Circles of investigation used for prediction of magnitude 8.0+ earthquakes

Number

Latitude

Lontitude

Flinn-Enghdal Seismic Region
name
number
115.00S175.00WTONGA ISLANDS173
217.50S174.00WTONGA ISLANDS173
320.00S175.00WTONGA ISLANDS173
422.50S176.00WSOUTH OF FIJI ISLANDS171
525.00S177.00WSOUTH OF FIJI ISLANDS171
627.50S177.50WKERMADEC ISLANDS REGION177
730.00S178.00WKERMADEC ISLANDS, NEW ZEALAND178
832.50S179.00WSOUTH OF KERMADEC ISLANDS179
935.00S180.00EEAST OF NORTH ISLAND, N.Z.688
1037.00S178.00EOFF E. COAST OF N. ISLAND, N.Z.160
1139.00S176.00ENORTH ISLAND, NEW ZEALAND159
122.00S136.00EIRIAN JAYA REGION, INDONESIA196
132.25S138.50EIRIAN JAYA, INDONESIA201
142.50S141.00ENEAR NORTH COAST OF IRIAN JAYA197
153.75S143.50ENEAR N COAST OF NEW GUINEA, PNG.200
165.00S146.00EEASTERN NEW GUINEA REG., P.N.G.207
175.00S149.00EBISMARCK SEA203
185.00S152.00ENEW BRITAIN REGION, P.N.G.192
196.25S154.00ESOLOMON ISLANDS193
207.50S156.00ESOLOMON ISLANDS193
218.75S158.00ESOLOMON ISLANDS193
2210.00S160.00ESOLOMON ISLANDS193
2310.50S162.50ESOLOMON ISLANDS193
2411.00S165.00ESANTA CRUZ ISLANDS184
2513.00S166.25EVANUATU ISLANDS186
2615.00S167.50EVANUATU ISLANDS186
2717.50S168.25EVANUATU ISLANDS186
2820.00S169.00EVANUATU ISLANDS186
2921.25S170.75ELOYALTY ISLANDS REGION189
3011.00N93.00EANDAMAN ISLANDS, INDIA703
319.5N93.75ENICOBAR ISLANDS, INDIA704
327.00N94.50ENICOBAR ISLANDS, INDIA704
335.00N95.75ENORTHERN SUMATERA, INDONESIA706
343.00N97.00ENORTHERN SUMATERA, INDONESIA706
352.00N98.50ENORTHERN SUMATERA, INDONESIA706
361.00S100.00ESOUTHERN SUMATERA, INDONESIA274
373.00S101.50ESOUTHERN SUMATERA, INDONESIA274
385.00S103.00ESOUTHERN SUMATERA, INDONESIA274
396.50S105.00ESUNDA STRAIT276
408.00S107.00EJAWA, INDONESIA277
418.50S109.50EJAWA, INDONESIA277
429.00S112.00ESOUTH OF JAWA, INDONESIA282
439.25S114.50ESOUTH OF BALI, INDONESIA284
449.50S117.00ESUMBAWA REGION, INDONESIA285
459.50S119.50ESUMBA REGION, INDONESIA287
469.50S122.00ESAVU SEA288
478.25S124.50ETIMOR REGION, INDONESIA289
487.00S127.00EBANDA SEA280
496.00S129.00EBANDA SEA280
505.00S131.00EBANDA SEA280
513.50S129.25ESERAM, INDONESIA272
522.00S127.50ECERAM SEA270
531.00S125.25ESOUTHERN MOLUCCA SEA269
540.00S123.00EMINAHASSA PENINSULA, SULAWESI265
550.00S120.50EMINAHASSA PENINSULA, SULAWESI265
561.50N125.00EMINAHASSA PENINSULA, SULAWESI265
573.00N127.00ETALAUD ISLANDS, INDONESIA263
585.25N126.50EMINDANAO, PHILIPPINE ISLANDS259
597.50N126.00EMINDANAO, PHILIPPINE ISLANDS259
609.75N125.50EMINDANAO, PHILIPPINE ISLANDS259
6112.00N125.00ELEYTE, PHILIPPINE ISLANDS256
6213.50N123.00ELUZON, PHILIPPINE ISLANDS249
6315.00N121.00ELUZON, PHILIPPINE ISLANDS249
6435.00N136.00ENEAR S. COAST OF WESTERN HONSHU233
6534.00N134.00ESHIKOKU, JAPAN236
6633.00N132.00EKYUSHU, JAPAN235
6731.00N132.00ESOUTHEAST OF SHIKOKU, JAPAN237
6829.00N131.00ESOUTHEAST OF RYUKYU ISLANDS239
6927.00N129.00ERYUKYU ISLANDS238
7026.00N127.00ERYUKYU ISLANDS238
7125.00N124.50ENORTHEAST OF TAIWAN245
7225.00N122.00ETAIWAN244
7322.50N121.50ETAIWAN REGION243
7420.00N121.50EPHILIPPINE ISLANDS REGION248
7517.50N121.00ELUZON, PHILIPPINE ISLANDS249
7645.50N150.50EKURIL ISLANDS221
7744.00N148.00EEAST OF KURIL ISLANDS222
7843.50N145.50EHOKKAIDO, JAPAN REGION224
7943.00N143.00EHOKKAIDO, JAPAN REGION224
8041.00N141.00ENEAR EAST COAST OF HONSHU, JAPAN228
8139.00N142.00ENEAR EAST COAST OF HONSHU, JAPAN228
8236.50N141.00ENEAR EAST COAST OF HONSHU, JAPAN228
8335.00N139.00ENEAR S. COAST OF HONSHU, JAPAN230
8433.00N141.00ESOUTH OF HONSHU, JAPAN211
8531.00N142.00ESOUTH OF HONSHU, JAPAN211
8629.00N142.50ESOUTH OF HONSHU, JAPAN211
8727.00N143.00EBONIN ISLANDS REGION212
8825.00N143.00EVOLCANO ISLANDS REGION213
8923.00N143.00EVOLCANO ISLANDS REGION213
9021.00N144.50EMARIANA ISLANDS REGION215
9119.00N146.00EMARIANA ISLANDS216
9216.50N147.00EMARIANA ISLANDS REGION215
9314.00N146.00ESOUTH OF MARIANA ISLANDS210
9412.00N144.00ESOUTH OF MARIANA ISLANDS210
9512.00N141.00ESOUTH OF MARIANA ISLANDS210
9646.00N152.00EKURIL ISLANDS221
9748.50N155.50EKURIL ISLANDS221
9851.00N158.00ENEAR EAST COAST OF KAMCHATKA218
9953.50N160.00ENEAR EAST COAST OF KAMCHATKA218
10056.50N161.50ENEAR EAST COAST OF KAMCHATKA218
10155.00N166.50EKOMANDORSKY ISLANDS REGION4
10253.00N171.00ENEAR ISLANDS, ALEUTIAN ISLANDS5
10351.50N176.00ERAT ISLANDS, ALEUTIAN ISLANDS6
10451.00N178.50WANDREANOF ISLANDS, ALEUTIAN IS.7
10551.50N173.00WANDREANOF ISLANDS, ALEUTIAN IS.7
10652.50N167.50WFOX ISLANDS, ALEUTIAN ISLANDS9
10754.00N162.50WALASKA PENINSULA12
10855.50N157.50WALASKA PENINSULA12
10956.50N152.00WKODIAK ISLAND REGION13
11060.00N153.00WSOUTHERN ALASKA2
11163.00N151.00WCENTRAL ALASKA1
11262.00N145.00WCENTRAL ALASKA1
11360.50N140.00WSOUTHEASTERN ALASKA19
11447.50N122.50WWASHINGTON29
11544.50N130.00WOFF COAST OF OREGON30
11643.00N126.00WOFF COAST OF OREGON30
11740.50N128.00WOFF COAST OF NORTHERN CALIFORNIA34
11840.50N123.00WNORTHERN CALIFORNIA36
11938.00N119.00WCALIFORNIA-NEVADA BORDER REGION40
12037.50N122.00WCENTRAL CALIFORNIA39
12135.00N118.50WCENTRAL CALIFORNIA39
12237.00N118.00WCALIFORNIA-NEVADA BORDER REGION40
12332.00N115.00WCALIF.-BAJA CALIF. BORDER REGION45
12429.00N112.50WBAJA CALIFORNIA, MEXICO48
12523.00N108.00WGULF OF CALIFORNIA49
12620.00N109.00WREVILLA GIGEDO ISLANDS REGION53
12718.50N106.00WOFF COAST OF JALISCO, MEXICO54
12819.00N103.50WJALISCO, MEXICO524
12917.00N100.00WNEAR COAST OF GUERRERO, MEXICO58
13016.00N97.00WNEAR COAST OF OAXACA, MEXICO66
13115.00N94.00WOFF COAST OF CHIAPAS, MEXICO68
13214.00N91.00WNEAR COAST OF GUATEMALA71
13312.00N88.00WNEAR COAST OF NICARAGUA74
13410.00N85.00WCOSTA RICA78
1358.00N82.50WSOUTH OF PANAMA83
1365.00N82.50WSOUTH OF PANAMA83
1376.00N76.00WNORTHERN COLOMBIA99
1388.00N73.00WNORTHERN COLOMBIA99
13910.00N70.00WVENEZUELA101
14013.00N60.00WWINDWARD ISLANDS95
14116.00N61.00WLEEWARD ISLANDS92
14219.00N63.00WLEEWARD ISLANDS92
14319.50N66.50WPUERTO RICO REGION90
14416.00N88.00WCARIBBEAN SEA94
1453.00N78.00WNEAR WEST COAST OF COLOMBIA102
1460.00S80.00WNEAR COAST OF ECUADOR105
1473.00S81.50WNEAR COAST OF ECUADOR105
1485.00S77.00WNORTHERN PERU111
1496.00S81.00WNEAR COAST OF NORTHERN PERU109
1508.00S74.00WPERU-BRAZIL BORDER REGION112
1519.00S79.00WNEAR COAST OF NORTHERN PERU109
15211.00S74.00WCENTRAL PERU116
15312.00S77.50WNEAR COAST OF PERU115
15415.00S75.00WCENTRAL PERU116
15517.50S71.00WNEAR COAST OF PERU115
15620.50S69.00WNORTHERN CHILE123
15722.00S67.00WCHILE-BOLIVIA BORDER REGION124
15823.50S70.00WNEAR COAST OF NORTHERN CHILE122
15925.00S68.00WCHILE-ARGENTINA BORDER REGION127
16027.00S71.00WNEAR COAST OF NORTHERN CHILE122
16128.00S69.00WLA RIOJA PROVINCE, ARGENTINA138
16230.00S71.50WNEAR COAST OF CENTRAL CHILE135
16331.00S70.00WCHILE-ARGENTINA BORDER REGION127
16433.00S72.50WOFF COAST OF CENTRAL CHILE134
16534.00S71.00WNEAR COAST OF CENTRAL CHILE135
16636.00S73.00WOFF COAST OF CENTRAL CHILE134
16739.00S73.50WOFF COAST OF CENTRAL CHILE134
16856.00S27.00WSOUTH SANDWICH ISLANDS REGION153
16957.00S25.00WSOUTH SANDWICH ISLANDS REGION153
17058.50S25.50WSOUTH SANDWICH ISLANDS REGION153
17146.13N12.68ENORTHERN ITALY545
17245.68N16.32ENORTHWESTERN BALKAN REGION383
17345.23N9.92ENORTHERN ITALY545
17443.43N12.09ECENTRAL ITALY381
17543.43N17.05ENORTHWESTERN BALKAN REGION383
17642.08N19.22EALBANIA391
17741.63N14.10ESOUTHERN ITALY390
17840.73N25.67EAEGEAN SEA365
17940.73N29.21ETURKEY366
18040.73N32.75ETURKEY366
18140.28N16.23ESOUTHERN ITALY390
18240.28N22.72EGREECE364
18340.28N36.29ETURKEY366
18439.83N20.36EGREECE-ALBANIA BORDER REGION392
18538.93N26.97EAEGEAN SEA365
18638.48N16.25ESOUTHERN ITALY390
18738.48N37.91ETURKEY366
18838.03N31.07ETURKEY366
18937.58N21.38ESOUTHERN GREECE368
19036.68N28.28EDODECANESE ISLANDS369
19136.23N35.56ETURKEY366
19235.33N23.38ECRETE370
19335.33N31.08ECYPRUS REGION372
19434.88N26.68ECRETE370
19534.43N33.28ECYPRUS REGION372
19642.53N46.06EEASTERN CAUCASUS337
19741.18N48.90EEASTERN CAUCASUS337
19840.73N43.96ENORTHWESTERN CAUCASUS362
19939.83N41.01ETURKEY366
20039.83N51.63ECASPIAN SEA338
20138.93N54.81ETURKMENISTAN340
20238.48N45.89EARMENIA-AZERBAIJAN-IRAN BORD REG344
20338.03N43.04ETURKEY366
20437.58N48.74ENORTHWESTERN IRAN345
20537.58N57.29ETURKMENISTAN-IRAN BORDER REGION341
20636.68N51.24ENORTHERN IRAN348
20736.23N45.08EIRAN-IRAQ BORDER REGION346
20836.23N54.04ENORTHERN IRAN348
20935.78N59.68ENORTHERN IRAN348
21034.43N46.48EWESTERN IRAN347
21132.63N48.5EWESTERN IRAN347
21232.63N56.98ENORTHERN IRAN348
21332.18N60.16ENORTHERN IRAN348
21430.38N50.18ENORTHERN IRAN348
21529.93N57.46ENORTHERN IRAN348
21629.93N60.06ESOUTHWESTERN PAKISTAN354
21728.13N51.77ESOUTHERN IRAN353
21827.68N56.87ESOUTHERN IRAN353
21927.23N59.93ESOUTHERN IRAN353
22026.78N53.75ESOUTHERN IRAN353
22142.98N78.43ELAKE ISSYK-KUL REGION330
22242.08N74.73EKYRGYZSTAN716
22341.63N81.3ESOUTHERN XINJIANG, CHINA321
22440.28N64.02ENORTHWESTERN UZBEKISTAN339
22540.28N70.51ETAJIKISTAN715
22640.28N78.18ESOUTHERN XINJIANG, CHINA321
22739.83N67.56ESOUTHEASTERN UZBEKISTAN714
22839.83N73.46ETAJIKISTAN-XINJIANG BORDER REG.719
22939.83N75.82ESOUTHERN XINJIANG, CHINA321
23038.93N71.63EAFGHANISTAN-TAJIKISTAN BORD REG.717
23138.48N73.82ETAJIKISTAN-XINJIANG BORDER REG.719
23238.03N69.83EAFGHANISTAN-TAJIKISTAN BORD REG.717
23338.03N84.65ESOUTHERN XINJIANG, CHINA321
23436.68N71.40EAFGHANISTAN-TAJIKISTAN BORD REG.717
23536.68N76.44EKASHMIR-XINJIANG BORDER REGION324
23636.68N82.60EXIZANG306
23736.23N68.60EHINDU KUSH REGION, AFGHANISTAN718
23835.78N73.43EPAKISTAN710
23935.78N79.48EKASHMIR-XIZANG BORDER REGION304
24034.43N70.68EAFGHANISTAN709
24134.43N82.23EXIZANG306
24233.53N73.17EPAKISTAN710
24333.08N75.87EEASTERN KASHMIR302
24432.18N82.95EXIZANG306
24531.73N78.18EXIZANG-INDIA BORDER REGION305
24630.83N66.30EAFGHANISTAN709
24730.38N69.42EPAKISTAN710
24829.93N80.34ENEPAL-INDIA BORDER REGION309
24930.83N89.70EXIZANG306
25029.93N99.58ESICHUAN, CHINA307
25129.03N95.63EEASTERN XIZANG-INDIA BORDER REG.313
25228.13N92.57EEASTERN XIZANG-INDIA BORDER REG.313
25327.23N100.22EYUNNAN, CHINA318
25426.78N97.25EMYANMAR-INDIA BORDER REGION294
25526.33N89.75EINDIA-BANGLADESH BORDER REGION315
25624.98N92.25EINDIA-BANGLADESH BORDER REGION315
25724.98N95.25EMYANMAR296
25824.53N98.25EMYANMAR-CHINA BORDER REGION297
25922.28N94.33EMYANMAR296
26022.28N99.72EMYANMAR-CHINA BORDER REGION297
26119.58N94.32EMYANMAR296
26216.88N94.24EMYANMAR296