Near Moodus-East Haddam, Connecticut
6
SUS
Near Essex, Massachusetts
Probably in the Saint Lawrence River valley, Canada
9
In the Saint Lawrence River valley region, Canada
10
1,900,000
In the Northern Cape Ann region, east of Newbury, Massachusetts
7
296,000
In the Saint Lawrence River valley, Canada
In the New York City area
In the Southern Cape Ann, Massachusetts, region (near Salem, Massachusetts)
157,000
East of Cape Ann, Massachusetts
8
1,000,000
5
127,000
Off the coast of Massachusetts
In the Los Angeles region, California
ML
ELL
In southern California
Near Petersburg, Virginia
FA
SC
Near the Muskingum River, Ohio
In Kentucky
F
In northwest Florida
West of New York City, New York (in New Jersey)
SET
On the Alaska Peninsula, Alaska
In the Shumagin Islands - Kodiak Island region, Alaska
Near Unga Island, Alaska
In the California - Nevada border region (in California)
Near Moodus, Connecticut
Near Kodiak Island, Alaska
Near Umnak Island, Alaska
Near San Juan Bautista, California
In the San Diego Region, California
DMG
In eastern Massachusetts
Near Unalaska Island, Alaska
Near San Diego, California
Near Fort Dearborn (Chicago), Illinois
78,000
Near Santa Barbara, California
Near San Francisco, California
Between Portsmouth and Hampton, New Hampshire
21,000
In northeast Arkansas
Mw
NLI
NU
11
5,000,000
SEE
Near Atka Island, Alaska
Near New Madrid, Missouri
12
In southwest San Bernardino County, California
West of Ventura in Santa Barbara Channel, California
In South Carolina
NUT
516,000
In northeast Massachusetts
55,000
In the California - Baja California border region
On the south flank of Kilauea, Hawaii
Near Saint Thomas, Virgin Islands
EHUS1982
Near New Harmony, Indiana
430,000
In southern Illinois
SG
BAR
Near Los Angeles, California
In West Virginia
490,000
Near San Louis Obispo, California
In central Virginia
135,000
Near Hilo, Hawaii
Near the Pribilof Islands, Alaska
In central California
In the San Francisco Bay area, California
In the San Francisco area, California
500,000
Near Santa Cruz, California
Near Hawaii
Near Monterey, California
In the New Madrid, Missouri  region (in Kentucky)
Near Marked Tree, Arkansas
NTI
1,500,000
In Arkansas
250,000
In southeastern Alaska
Near Sitka, Alaska
Probably north of Puerto Rico
MIDAS-IPGH
Near Knoxville, Tennessee
Near Stamford, Connecticut
Near Chirikof Island, Alaska
Near Harwich, Massachusetts
34,000
Near Wytheville, Virginia
359,000
66,000
In Baja California, Mexico
5MG
260,000
Near San Luis Obispo, California
Near Lowville, New York
In Virginia
159,000
Near Lexington, South Carolina
In Humboldt Bay, off the coast of Humboldt County, California
In the Kodiak Island Region, Alaska
In the Sierra County area, California
In the Hudson River valley area, New York
Near the coast of northern California
In the Socorro area, New Mexico
Near San Gabriel, California
North of San Francisco, California
South of San Francisco in San Mateo County, California
Near Santa Ysabel, California
Near Fort Tejon, California
HK
290,000
In northern California
200,000
Near Buffalo, New York
65,000
Near Lewiston, Maine
11,000
Near Line Shore, Kentucky
North of San Jose, California
Near San Bernardino, California
Near Long Prairie, Minnesota
Near Carson City, Nevada
Near Mayaguez, Puerto Rico
Near Eureka, California
Near Dublin, California
Near Wilkesboro, North Carolina
784,000
Near Honolulu, Hawaii
45,000
23,000
North of Watsonville, California
East of San Francisco, California
Southeast of San Francisco, California
36,000
20,000
14,000
Near Bennett Valley, California
South of San Jose, California
Near Memphis, Tennessee
30,000
In the Santa Cruz Mountains, California
100,000
Near Gilroy, California
120,000
Near Manhattan, Kansas
In northern Alaska
In the Virgin Islands
In northern New York
Near the Island of Hawaii
WY
Near Hilea, southeast Hawaii, Hawaii
Near the Shumagin Islands, Alaska
Near Virginia City, Nevada
190,000
West of Lone Pine, California
42,000
Near Hayward, California
125,000
Near Ukiah, California
28,000
180,000
In western Nevada
Near the Bay of Fundy
Near Oakland, California
35,000
Near Lanai, Hawaii
COX
Near Mattole, California
29,000
Near Lone Pine, California
Near Lily Park, Colorado
On the New Jersey - Delaware border (in Delaware)
Near Austin, southern Lander County, Nevada
SJG
31,000
In Owens Valley, near Lone Pine, California
HHT
480,000
300,000
Near Sierraville, California
32,000
160,000
In Round Valley, California
350,000
Near Cerro Gordo, California
In the Imperial Valley area, California
In the Aleutian Islands, Alaska
In Nevada
129,000
In western Montana
MMT
Near Lake Chelan, Washington
650,000
Near Crescent City, California
181,000
South of Janesville, California
Near Eureka, Nevada
In western Ohio
In northern Georgia
Near Arecibo, Puerto Rico
Near Moroni, northern Sanpete County, Utah
3,000
Near Freestone, California
In the Wabash River valley (in Illinois)
150,000
4
North of Portland, Oregon (in Washington)
40,000
In eastern Nebraska, between Lincoln and Columbus
450,000
Near Flushing, New York
Near Columbus, northwest Hickman County, Kentucky
Near Petrolia, California
8,000
Near Cimarron, New Mexico
Near Yuma, Arizona
Near Saint Augustine, Florida
25,000
Near Visalia, California
In the Andreanof Islands, Aleutian Islands, Alaska
In the Puget Sound area, Washington
South of Alaska
In Washington
North of Imusdale, California
Southwest of Modesto, California
140,000
Near La Salle, Illinois
Near Kona, Hawaii
East of Hollister, California
Near Olympia, Washington
In the Santa Cruz area, California
In southeast Oklahoma
Near Denver, Colorado
KRK
485,000
In the Mississippi River valley (in Kentucky)
185,000
70,000
Near Cairo, Illinois
Off the coast near Santa Barbara, California
In the Arkansas - Missouri border region
Off the coast of northern California
Near New York City
540,000
Near Lima, Ohio
373,000
Near Paris, Idaho
15,000
Near the Island of Maui, Hawaii
Near Susanville, California
110,000
South of Hollister, California
81,000
Near Parkfield, California
240,000
Near Cloverdale, California
In Inyo County, California
Near Summerville, South Carolina
Near Charleston, South Carolina
BOL
2,000,000
In the Kau District, Hawaii Island
Near Vincennes, Indiana
170,000
In northern Sonora, Mexico
NS
1,590,000
Near Halfway House, California
Near Kanab, Utah
North of Petaluma, California
9,000
Near Alturas, California
Near Cromberg, California
Yuma, Arizona
69,000
Near York, Pennsylvania
10,000
38,000
West of Antioch, California
North of Susanville, California
<1,000
53,000
Near Pomona, California
52,000
92,000
In northeast San Diego County, California
Near Corralitos, California
Near Ferndale, California
Near San Jose, California
50,000
Near Rusk, Texas
JLQ
Near Saint George, southern Washington County, Utah
Near Evansville, Indiana
22,000
Near Mount Vernon, Illinois
560,000
Near Napa, California
54,000
Near Port Angeles, Washington
Near Flagstaff, Arizona
WASHINGTON-OREGON BORDER REGION
UK
EPB
26,000
Near the California - Mexico border
Near Vacaville, California
Near Winters, California
Near Davis, California
West of Hollister, California
Near Umatilla, Oregon
NQT
Near Newhall, California
71,000
Near Belen, New Mexico
39,000
19,000
East of Santa Rosa, California
Near Los Lunas, New Mexico
In northern Utah
Northwest of San Bernardino, California
In southern Humboldt County, California
80,000
Near High Bridge, New Jersey
In Montana
Near Charleston, Missouri
2,037,000
In the Prince William Sound region, Alaska
Near Independence, California
In southwest Virginia
64,000
In northeast New York
225,000
In Giles County, Virginia
690,000
130,000
Near Dillon, Montana
Near Casper, Wyoming
In Kansas
116,000
Near Pulaski, Virginia
88,000
Near Mare Island, California
Near Greenwood, California
Ms
ABE
In Tennessee
In the Near Islands, Aleution Islands, Alaska
Susitna Station, Alaska
In southern Alaska
In the Rat Islands, Aleutian Islands, Alaska
132,000
265,000
Off the coast of Humboldt County, west of Eureka, California
179,000
Near Watsonville, California
Near San Francisco, in northern San Mateo County, California
Northeast of Watsonville, California
98,000
In Cook Inlet, Alaska
On the Kenai Peninsula, Alaska
West of Squirrel Inn, California
Near Lytle Creek Canyon, California
Near Cape Yakataga, Alaska
PT
610,000
Yakutat Bay, Alaska
700,000
Near the Cooper River delta, Alaska
Near Santa Rosa, California
2,000
Near Hemet - San Jacinto, California
Near Berea, Ohio
Near Goshen, Utah
In the Kodiak Island region, Alaska
310,000
In the Gulf of Alaska
104,000
Near Portsmouth, Ohio
Near Elko, Nevada
Southern Utah
Near Kenai, Alaska
In the Fox Islands, Aleutian Islands, Alaska
Near Saint Louis, Missouri
South of Elmira, California
33,000
Near Los Alamos, California
Near Battle Creek, Nebraska
90,000
Near Pine Valley, Utah
Near Wonder, Nevada
Near Savannah, Georgia
In the Mississippi River valley (in Illinois)
202,000
Near Helena, Montana
Near Willows, California
168,000
340,000
In southeast Maine
388,000
Near Rampart, Alaska
In southern Maine
Near Calumet, Michigan
375,000
Near Shoshone, Idaho
Near Bakersfield, California
In northeast Washington
18,000
95,000
233,000
TW
425,000
Near Brawley, California
Near Guerneville, California
Near Upper Lake, California
On the South Dakota - Nebraska border (in South Dakota)
Near Houghton, Michigan
In the Puerto Rico region
205,000
Near Piedras Blancas, California
Near Arvonia, Virginia
Near Bristol Bay, Alaska
mb
GR
South of the Aleutian Islands, Alaska
In the Bering Strait
In the Honey Lake region, California
In Prince William Sound, Alaska
In southeast Alaska
Near Allentown, Pennsylvania
16,000
CFR
Near Crater Lake, Montana
Near the British Columbia - Washington border (in Washington)
Near Yakutat, Alaska
In the North Dakota - Montana - Saskatchewan border region
Mn
1,300,000
Upper Mattole, California
Near Aurora, Illinois
South of Downieville, California
Between Havana and Petersburg, Illinois
121,000
Wabash River valley, between Terre Haute and Vincennes, Indiana
377,000
In the Hansel Valley, Utah
In the Cape Girardeau, Missouri region
Near Scotia, California
Near Richfield, Utah
Near Elsinore, Utah
155,000
Near Bishop, California
In the Lake Elsinore region, California
75,000
Near Salt Lake City, Utah
Off the coast of Oregon
In the Coconino National Forest, near Flagstaff, Arizona
Southeast of Goldfield, Nevada
In the California - Nevada border region (in Nevada)
In Esmeralda County, Nevada
East of Salinas, California
Near Hollister, California
Near Rison and Warren, Arkansas
99,000
In South Dakota
Near Coyote, California
Near San Jacinto, California
Near Aurora, Freeport, Morris, and Yorkville, Illinois
In central Alaska
In northern Arizona
142,000
Southeast of Oxnard, California
In the Union County, South Carolina
7,000
DDA
In north-central Idaho
Near Ridgway, Colorado
In Ontario, Canada
518,000
Near Reno, Nevada
In Georgia
246,000
269,000
Near Ogden, Utah
In Santa Clara County, California
Near Whitmore, California
North of Calexico, Imperial Valley, California
Near Provo, Utah
13,000
In Pleasant Valley, Nevada
WAL
788,000
Near Piedmont, California
In the New Madrid, Missouri  region
Off the coast of Humboldt County, California
3
Near Schenectady, New York
278,000
Near Waynesville, North Carolina
600,000
Near Nogales, Arizona
Near Boise, Idaho
PAS
Near Paicines, California
JON
Near Irondale, Alabama
384,000
Near Lebec, California
Near Avila, California
Near Hickman, Kentucky
In the Texas Panhandle area
5,000
In the Mississippi River Valley in southern Illinois
408,000
In the Imperial Valley, near Holtville, California
Near Owens Valley, California
Near Lopez Canyon, California
In the region northwest of Puerto Rico
Stables, Minnesota
48,000
In eastern Idaho
Near Downieville, California
Near Luray, Virginia
184,000
390,000
Near Corona, California
Near Calexico, California
Near Cerrillos, New Mexico
Near Hemet, California
Off the coast of northern Humboldt County, California
Near El Reno, Oklahoma
1,000
In the northwestern Mona Passage, Puerto Rico
In the New Madrid, Missouri  region (in Tennessee)
106,000
Near Mauna Loa, Hawaii
Near Venice, California
East of Redding, California
Near Maricopa, California
Near Front Royal, Virginia
Near Kilauea, Hawaii
In the Juneau area, Alaska
Near Warner Springs, California
In the Strait of Georgia, northwest Washington
Near Inglewood, California
In the Leeward Islands
6,000
Near Hot Springs, California
Near Terre Haute, Indiana
89,000
Near Winner, South Dakota
In the Cholame Valley area, California
230,000
175,000
In the Unimak Island region, Alaska
Near Eldorado, Illinois
Near Lakeview, southern Lake County, Oregon
2
Near Bellingham, Washington
Near Redlands, California
In Missouri
Near Wardboro, Idaho
Near Salinas, California
17,000
Wabash River valley, near Princeton, Indiana
325,000
In the Clarkston Valley, north of Gallatin County, Montana
DOR
Near Three Forks, Montana
Near Santa Barbara, in the Santa Barbara Channel, California
520,000
Near Henderson, Kentucky
In eastern New Hampshire, near Lake Winnipesaukee
In Wyoming
In the southern Mitchell County area, North Carolina
Near Idria, California
In the Bering Sea
Off the coast of Monterey County, California
In southeast Ohio, near Pomeroy
In the Imperial Valley, California
Between Jonesboro and Marked Tree, Arkansas
Near Asbury Park, New Jersey
In Santa Monica Bay, California
Northwest of Bishop, California
194,000
Off the coast of Santa Barbara County, west of Lompoc, California
Near Santa Maria, California
Near Startup, southern Snohomish County, Washington
Near Milo, Maine
REN
Near Saranac Lake, New York
West of Paskenta, California
Near Weaverville, California
In western Idaho
In the southern Appalachian Mountains (in Tennessee)
DG
Near Fairbanks, Alaska
161,000
KAN
Near Whittier, California
RIC
Near Attica, New York
ST
880,000
Near Holualoa, Hawaii
Southeast of Aberdeen, California
Near Charlottesville, Virginia
Near Summit, California
Near Westmorland, California
Near Lake Tahoe, Nevada
49,000
Near Fernley, Nevada
Near Grover, northern Lincoln County, Wyoming
Near Perrydale, Oregon
24,000
In Santa Monica Bay, west of the Los Angeles basin, California
12,000
Near Anna, Ohio
Near Napoleonville, Louisiana
48, 000
Off the coast of California
Near Albuquerque, New Mexico
In the Lake George area, New York
Near Birmingham, Alabama
Near Attu Island, Alaska
Near Merriam, Kansas
Near Valentine, Texas
NTT
980,000
Off the coast, southwest of Cape Mendocino, California
BRK
Off the coast of Humboldt County, northwest of Cape Mendocino, California
Near Charleston, Mississippi
Western Wyoming
Near Big Sur, California
VIC
In south-central Alaska
In western Texas
Near the forks of the Tolt River, Washington
Near Springville, California
Near Seattle, Washington
Near Cedar Mountain, Nevada
795,000
In the California - Nevada border region
Near Parowan, Utah
Southeast of Long Beach, near Newport Beach, California
213,000
Near Anchorage, Alaska
Near Niles, California
In the Excelsior Mountains, Nevada
Near Kosmo, Hansel Valley, Utah
DOS
405,000
In Utah
Near Kosmo, Utah
165,000
In southern Nevada
In the Adirondack Mountains area, near Lake Champlain, New York
WOO
Near Aromas, California
Near Chadron, Nebraska
60 ,000
In the Mississippi River valley near the Illinois - Missouri border (in Missouri)
85,000
Near Rock Island, Illinois
Wellton, Arizona
In the Grand Canyon, Arizona
Near Bernardo, New Mexico
Near Tecumseh, Nebraska
210,000
Near Craig, Montana
570,000
315,000
Near Timiskaming, Quebec, Canada
2,590,000
KJ
In Yellowstone National Park, Wyoming
Near Pampa, Texas
87,000
Near Milton - Freewater, Oregon
In western Ohio, near Anna and Sidney
280,000
In the San Francisco Bay region, California
In western Ohio, near Anna
Terwilliger Valley, California
37,000
Near Salcha, Alaska
North of the Island of Maui, Hawaii
Near Long Beach, California
Near Trident, Montana
In southern Blair County, Pennsylvania
South of Pepperwood, California
In southwest New Mexico, near the Continental Divide
TAG
In southwest New Mexico
In the Shumagin Islands region, Alaska
Near Talmage, California
In New Mexico
In Alameda County, north of San Jose, California
In Inyo County, northwest of Bishop, California
62,000
Near Gardnerville, Nevada
Near Boulder City, southern Nevada
Northeast of Mina, Nevada
115,000
Southwest of Hollister, California
In the southern Puget Sound area, Washington
Near Griggs, Illinois
440,000
Near Cholame, California
North of Paradise, California
72,000
Near Branscomb, California
In the Imperial Valley, near El Centro, California
North of the Island of Hawaii
In the Kenai Peninsula area, Alaska
ROG
Near Ossipee Lake, New Hampshire
356,000
Southwest of Benbow, California
ESM
Off the coast of Humboldt County, west of Ferndale, California
Near Okanogan, north-central Washington
Near Mammoth Lakes, California
60,000
Near Gardena, California
Near Portland, Oregon
Near Mount Montgomery, Nevada
Near Cedar City, Utah
Near Borrego Valley, California
TH
57,000
In the Lake Erie area, Ohio
BAS
In Southern Sheridan County, Montana
Northwest of Puerto Rico
Near Lake Arrowhead, California
Near San Leandro, California
27,000
East of Banning, California
41,000
Near Redondo Beach, California
Near Sheep Mountain, southwest Idaho
153,000
Between Massena, New York, and Cornwall, Ontario, Canada
1,095,000
In New York
Near Basalt, Colorado
Near Aberdeen, Washington
Near Idaho City, Idaho
128,000
Near North Bend, Washington
Off the coast of southern Humboldt County, California
4,000
Near Camden, South Carolina
In northwest Montana
In south-central Utah
West of Bishop, California
North of Walker Pass, California
222,000
Unimak Island region, Alaska, southeast of Scotch Cap Lighthouse
Strait of Georgia, British Columbia, Canada
Wessington, South Dakota
In the Dominican Republic
Near Banning, California
East of King City, California
Near Seeley Lake, Montana
Near Manix, California
151,000
Waterloo-Dupo, Illinois, area, south of Saint Louis, Missouri
In southern Michigan
158,000
In Placer County, southwest of Reno, Nevada (in California)
In the Fairbanks area, Alaska
In the San Antonito area, New Mexico
In southwest Montana
In Maine
East of Tipton, California
In Hartley County in northwest Texas
123,000
Southwest of Oxnard, California
Off the Island of Oahu, Hawaii
UH
In the Hoover Dam area, Nevada
Near Desert Hot Springs, California
West of Reno, Nevada
Southeast of Bishop, California
77,000
Northwest of Hollister, California
BL
295,000
82,000
Near Richmond, California
Near Point Concepcion, California
Near Huntington Park, California
Near Punta Gorda, California
In Apache County, Arizona
North of Santa Paula, California
Near Langley, Washington
67,000
Near Calipatria, California
44,000
Near Idyllwild, California
Near Hawthorne, California
Near Herlong, California
56,000
In the western Arizona - Sonora border region
Near Kilauea caldera, Hawaii
In the Pinnacles National Monument area, California
Near Napoopoo, Hawaii
Off Cape Mendocino, California
South of Eureka, California
Near the southeast point of San Clemente Island, California
Near Burlington, Vermont
Northeast of Lone Pine, California
587,000
Near Boulder City, Nevada
Near Zanesville, Ohio
Near Dyersburg, Tennessee
In Kern County, California
BLT
353,000
East of Bakersfield, California
Near Acton, California
Southwest of Petrolia, California
Near Bryson, California
Near Shemya Island, Alaska
In the Near Islands area, Aleution Islands, Alaska
Near Concho, Oklahoma
ROT
Near Calpella, California
In the Brawley area, California
In the Flathead lake area, Montana
Southwest Illinois
In southeast Kentucky
Near Sinking Spring, Pennsylvania
West of Wheeler Ridge, California
Near Wilkes-Barre, Pennsylvania
KIR
In the Santa Rosa Mountains, California
East of Watsonville, California
Near Lake Stevens, Washington
HVO
In the Fallon - Stillwater area, Nevada
347,000
SAW
Off the coast of Ventura County, near Anacapa Island, California
In Dixie Valley, Nevada
Near Lakeport, California
In the Dixie Valley - Fairview Peak area, Nevada
East of San Leandro, California
Near Eureka-Arcata, California
In the Mississippi River valley, near Finley, Tennessee
Near San Ardo, California
Near Hawaii Volcanoes National Park, Hawaii
Near Finley, Tennessee
West of Sparta, Illinois
Near Lower Lake, California
Near Lake City, Colorado
UPP
East of San Jose, California
In the Concord - Walnut Creek area, California
Near Glen Ivy, California
Near South-central Kansas
In Oregon
Near the Arkansas - Tennessee border (in Arkansas)
86,000
Near Saint Helena, California
West of Catoosa, Oklahoma
SLM
Northwest of Parkfield, California
Wayne County, Missouri
MOS
Near Hawthorne, Nevada
In northwest Washington
RK
In the Fox Islands, Andreanof Islands, Alaska
South of Oxnard, California
West of Daly City, California
In the Long Valley area, New Jersey
Southwest end of Salton Sea, California
Near the coast of Maine
Near Woodlawn, North Carolina
Off the coast of southeastern Alaska
In the Buncombe County area, North Carolina
MAT
Northwest of Salem, Oregon
In northwest Jackson County, North Carolina
In northern Idaho
Near Huslia, Alaska
In north-central Washington
In the Boulder City area, Nevada
Southeast of Soledad, California
Southeast of Sierraville, California
Near Willapa Bay, Washington
In southeast Illinois, near the Indiana border
Southwest of San Francisco, California
In the eastern Dominican Republic
Near Panguitch, western Garfield County, Utah
In the Dixie Valley area, Nevada
Northeast of Loyalton, California
North of Ukiah, California
In southwest Oklahoma
Near Schurz, northeast Mineral County, Nevada
105,000
Near the Arizona-Utah border (in Arizona)
In the Charleston - Summerville area, South Carolina
Near Chelan, Washington
Near Hazel Green, Alabama
Near Hebgen Lake, Montana
DSR
BOT
1,175,000
In the Hebgen Lake region, Montana
In the Yellowstone region, Wyoming
Near the coast of Oregon
In eastern Arizona
Near Owens Peak, California
Near Chesterfield, South Carolina
MD
YEL
Near Lajoya, New Mexico
Near Soda Springs, Idaho
Near Montrose, Colorado
PAL
Near Walker Pass, California
Near Ephraim, Utah
In northwest Oregon
WYS
GW
In Clark County, near the Oregon - Washington border (in Washington)
East of Brown, California
Near Huntington Beach, California
Near Wheeler Ridge, California
Near Pierre, South Dakota
Near New Madrid, Catron and Marston, Missouri
HRN
In Colorado
GOL
In western Arizona
Near the north coast of Haiti
Near Perris, California
STT
Off the coast of Del Norte County, California
In Cache Valley, Utah
UU
Northwest of Arcata, California
In the Anchorage area, Alaska
Near Big Bear, California
YP
Near Berkley, Washington
Near Maple Valley, Washington
Near Clayton, Idaho
DW
Near Poplar Bluff, Missouri
208,000
West of Sunnyvale, California
In central Utah
In central Idaho
Near the coast of Massachusetts
Northeast of Peabody, Massachusetts
WES
Near Toms Place, California
Near Prince William Sound, Alaska
ISC
Near Merriman, Nebraska
Near Cornwall, Pennsylvania
In the California - Mexico border region
Near Warner, New Hampshire
Off the coast of Washington
In the Dyer area, Nevada
In the Nome area, Alaska
West of Ensenada, Mexico
Southwest of Fontana, California
In Southwest Montana
KA
Near San Bernardino Valley, California
LB
337,000
Near Saugus, California
Near Pittsburg, California
Southeast of Newberry, California
Near Palm Springs, California
In eastern Missouri
420,000
South of Glendale, California
STR
Near Dulce, New Mexico
HDP
South of Luning, Nevada
BAK
Near Chico, California
Southwest South Dakota
In the Gulf of California
Near Kermit, Texas
Near Boca, California
Near Palos Verdes Peninsula, California
Near Trinidad, Colorado
In the Mona Passage, Puerto Rico
HER
Near Anza, California
Near Greenville, Mississippi
JDH
Near Redwood Valley, California
Northeast of Morgan Hill, California
74,000
At Borrego Mountain, near Ocotillo Wells, California
South of Willows, California
In southern Oregon
Off the coast of southern California in Santa Barbara Channel, California
Near Durant, Oklahoma
GS
1,473,000
In Central Arkansas
Near Palmdale, California
Near Ketchum, Idaho
Near Borrego Springs, California
THH
JM
Near Elgood, West Virginia
GB
In southern Arizona
Near Cupertino, California
In the Amistad area, New Mexico
NMI
Near Danville, California
Off the coast of central California in Monterey Bay, California
In the Lytle Creek area, California
North of San Fernando, California
212,000
Near San Fernando, California
Near Newry, South Carolina
West of Brawley, California
HRM
76,000
Southeast of Hollister, California
SOM
SR
In northern Illinois
Near Midway, Utah
South of San Juan Bautista, California
Off the coast of Ventura County, near Point Mugu, California
In the Chesapeake Bay region
PDE
In the Yellowstone Region, Wyoming
GM
ERL
Near the northeast coast of the Island of Hawaii
In the New Hampshire - Quebec border area
182,000
In the California - Baja California, Mexico border region
PMR
BLA
In the California-Nevada border region (in Nevada)
ADK
In the Grants area, New Mexico
Southwest of Nubieber, California
In the Texas Panhandle region
Near Healdsburg, California
In southeast Illinois
400,000
In the Fox Islands, Aleutian Islands
In the New Madrid, Missouri, region
In the Wappingers Falls area, New York
Near Sunnymead, California
South of Calipatria, California
Near Compton, California
SLC
Near Bartlett, Nebraska
In the Galway Lake area, California
In central Callifornia
Near Fortuna, California
In Alabama
Western Minnesota
TUL
Near Oroville, California
HBK
HB
In the Oroville area, California
Near Firebaugh, California
South of Mariposa, California
Near Palmerdale, Alabama
JLM
West of Avenal, California
Near Foster, Oklahoma
AND
Near Brea, California
Near Crownpoint, New Mexico
North of Avenal, California
EBE
In northern Georgia, south of Conasauga, Tennessee
Near Newport, in southeast Rhode Island
CON
In the Pompton Lakes area, New Jersey
Near Granada Hills, California
In northern Oregon
Near Ridgefield, New Jersey
In the Vancouver Island region, British Columbia, Canada
Northwest of Brawley, California
HH
West of Los Angeles, California
MSO
In the Hawaii region
In the Near Islands, Aleutian Islands
51,000
Southwest Broadwater County, Montana
In western Arkansas
In northwest Ohio
AAM
Southwest of French Camp, California
In northeast Utah
CDL
Northwest of West Yellowstone, Montana
Ikn Mississippi
Near El Centro, California
Near Willits, California
Near Cascade, Idaho
Near Concord, New Hampshire
Near Magna, Utah
WAS
94,000
Near Snyder, Texas
VOS
In the Andreanof Islands, Aleutian Islands
Near Goleta, California
ED
In the Lake Tahoe region, California
In the Lake Crowley area, California
In Pennsylvania
In southeast Idaho
Near Malibu, California
Near Cripple Creek, Colorado
In the Honey Lake Valley, California
46,000
HLS
In southwest Washington
Near Landers, California
LGO
In the Alaska Peninsula area, Alaska
Near Onyx, California
Near Big Bear Lake, California
WK
Near Mahaska, Kansas
Near the Alaska Peninsula
63,000
In northwest South Carolina
In the Imperial Valley area, on the California - Baja California, Mexico, border
FRK
North of Livermore Valley, California
BMU
Near Livermore, California
Southeast of Anza, California
QAM
QMA
Near Mount Saint Helens, Washington (earthquake and volcanic eruption)
349,000
In the Mammoth Lakes area, California
272,000
224,000
In the Owens Valley area, California
ARC
In the Owens Valley area, California (in California)
Near Sharpsburg, Kentucky
HRR
667,000
97,000
East of Truckee, California
In northwest Tennessee
BUR
In central Washington
In the Rat Islands, Aleutian Islands
Near Orem, Utah
Near Fremont, California
Near Island of Molokai, Hawaii
73,000
Near Hendersonville, North Carolina
In the California-Nevada border region (in California)
Near Honeydew, California
In western Tennessee
Off the coast of Los Angeles County, California
Near New Brunswick, Canada
Near Laconia, New Hampshire
In the area of Enola-Naylor, Arkansas
SRT
HAV
Southwest Utah
Near Inyokern, California
Near Coalinga, California
93,000
59,000
Near Lagrangeville, New York
Near Fort Thompson, South Dakota
Near Lincoln, Montana
108,000
Northwest of San Simeon, California
In the Blue Mountain Lake area, New York
634,000
Near Borah Peak, Idaho
855,000
Near Kaoiki, Hawaii
In eastern Tennessee
TEC
In Lancaster County, Pennsylvania
Near Morgan Hill, California
GDW
173,000
68,000
Near Ringgold, Georgia
GT
In eastern Wyoming
287,000
Near Santa Ynez, California
114,000
BU
South of the Aleutian Islands
Near Avenal, California
GP
Near Grand Terrace, California
In southeast New York
In northeast Ohio
322,000
Near North Palm Springs, California
134,000
In northwest Georgia, near Chattanooga, Tennessee
SZ
Off the coast of San Diego County, California
Near Chalfant, California
258,000
Near Greenback, Tennessee
Near Olney, Illinois
433,000
Near Whittier Narrows, California
West of Westmorland, California
470,000
580,000
MH
Near Clawson, Utah
In northeast Kentucky, near Sharpsburg
103,000
In the Hawaiian Islands region
Near Berlin, New Hampshire
Northeast of Logan, Utah
Off the coast near Malibu, California
Near Salina, Utah
148,000
Southern Alaska
Northeast of San Jose, California
Near Newport Beach, California
Near Steele, Missouri
Near Okanogan, Washington
Near Bell Gardens, California
Near Kalapana, Puna District, Hawaii
Near Redwood Estates, California
Near Littleville, Alabama
Loma Prieta, California, earthquake
Near Mona Passage
MPR
FDF
SEA
TRN
South of Cape Girardeau, Missouri
Near Malden, Missouri
Near Sierra Madre, California
Near Alton, Missouri
Near Joshua Tree, California
Near Cape Mendocino, California
Offshore Cape Mendocino, California
BUT
Near Little Skull Mountain, Nevada
AEI
HRV
Near Scotts Mills, Oregon
In Minnesota
mbLg
In Mississippi
AEIC
Near Northridge, California
ME
In the Mariana Islands
Near Ridgecrest, California
PGC
Near Bremerton, Washington
Near Ada, Oklahoma
In Escambia County, Alabama
Near Quincy, California
In Oklahoma
Near Pymatuning, Pennsylvania
Near Redding, California
Near Scottys Junction, Nevada
Near Bolinas, California
Near Hector Mine, California
West of Eureka, California
NC
Near Missoula, Montana
Near Napa and Yountville, California
Near South Lake Tahoe, California
Near Healy, Alaska
Near Truckee, California
In the Mona Passaga off Mayaguez, Puerto Rico
Near Burney, California
MW
Near Nisqually, Washington
Near Conway, Arkansas
Near Satsop, Washington
Near Portola, California
South of the Mariana Islands
Near Road Town, British Virgin Islands
RSPR
In the Channel Islands region, California
Near Plattsburgh, New York
OTT
Near Charlotte Amalie, U.S. Virgin Islands
Near Beatty, Nevada
In the Mount Hood area, Oregon
In the greater Los Angeles area, California
Nenana Mountain, Alaska
The Denali, Alaska, earthquake
On the Olympic Peninsula, Washington
In western Kentucky
In the Unimak Island region
In Mona Passage
In the Rat Islands
In the Andreanof Islands
In central  California
In the Guam region
In the Kodiak Island region
In Alaska Peninsula