Oklahoma Earthquakes and Syzygy


Oklahoma Earthquakes and Seismic Windows
Date Time Epicenter Mg/Int Lat Lon FM Per NM Sync Notes
22-Oct-1882 15:15 SE Oklahoma? 4.9/VI 34.0 98.0 -4 -3 10 32 hrs Felt 450 miles away
10-Sep-18 10:30 El Reno(swarm) 3.6/V 35.5 98.0 -10 -10 5 16 hrs. objects from shelves
11-Sep-18 06:30 El Reno 3.5/V 35.5 98.0 -9 -9 6 16 hrs.
11-Sep-18 08:00 El Reno 3.5/V 35.5 98.0 -9 -9 6 16 hrs.
27-Dec-29 18:30 El Reno 4.0/VI 35.5 98.0 -18 -19 3 2 hrs. People fled houses
19-Aug-33 13:30 El Reno 3.4/VI 35.5 98.0 13 14 -1 46 hrs. Chimneys cracked
11-Apr-34 11:40 Hugo + Paris, TX 4?/V 33.9 95.5 11 0 -4 79 hrs. Strong
14-Mar-36 11:20 Vallant, SE Okla 3+/V 34.0 95.2 7 -8 -8 5 hrs. Many alarmed
19-Jun-36 21:24 Kenton, 3.5?/V 35.8 101.3
2 0 61 hrs. Slight damage
09-Apr-52 10:29 El Reno 5.5/VII 35.4 97.8
0 -3 88 hrs. 50'crack state Capitol building
16-Apr-52 10:29 El Reno 4./V 35.4 97.8
7 4 88 hrs. Many awakened.
17-Mar-53 07:12 Concho, Minco 4.2/VI 35.6 97.8
2 2 13 hrs. Foundation damage
17-Mar-53 08:25 Concho, El Reno 4?/V 35.6 97.8
2 2 13 hrs.
16-Feb-56 17:30 Edmund, Guthrie 4?/VI 35.4 97.3 -13 -11 2 48 hrs. Broke windows
02-Apr-56 10:03 Antlers, SE Okla 3+/V 35.0 95.0 4 7
70 hrs. Thunderous noises
30-Oct-56 04:36 Beggs, Catoosa 4.2/VII 36.2 95.9 8 -4 -6 58 hrs. Oilwell shutdown
15-Jun-59 06:45 Seminole 3+/V 34.6 98.1 -6 -5 8 30 hrs. dishes broken
17-Jun-59 04:27 Cache, Duncan 4.3/VI 34.6 98.1 -4 -3 9 30 hrs. Many alarmed
10-Jan-61 19:40 Dow, SE Okla 4?/V 35.0 95.0 8 -6 -6 1hr.! Thunder under ground
22-Feb-61 03:45 Amsden, Arcadia 3+/V 36.0 101.0
7 et7 21 hrs. Fostoria awakened
27-Apr-61 01:30 Antlers, SE Okla _._/V 35.0 95.0 -1 -3
47 hrs. Thunder underground
14-Oct-68 08:43 Durant, Bryan Co. 3.5/VI 34.0 96.4 -7 -6 7 38 hrs. Fled homes, office
02-May-69 05:33 Wenoka, Chandler 4.6/V 35.2 96.3 2 3
47 hrs. Plaster cracked
15-Feb-74 22:49 Texhoma 4.6/VI 36.5 100.7 9 10
24 hrs. Plaster cracked
29-Nov-75 14:30 Foster 3.6/VI 34.5 97.3 9 -3 -5 57 hrs. Foundations cracked
30-Mar-76 09:27 Keyes, NW Okla 2.7/V 36.6 102.1 15 15 0 16 hrs. Objects fell
14-Mar-79 04:37 W. Yukon, C. Okla 2.2/V 35.5 97.8 1 16 et16 19 hrs. Objects fell
25-Jul-79 03:16 Wilson, S. Okla 2.7/V 34.0 97.6 13 13 -1 16 hrs. Objects fell
02-Nov-80 04:01 Mustang, C. Okla 3.0/V 35.5 97.8 10 10
7 hrs. Objects fell
03-May-82 01:55 Durant, Bryan Co. 3.1/VI 34.0 96.5 5 21 20 22 hrs. Pipes broken
20-Jul-89 00:08 Enid, Canton 3.1/V 36.4 98.9 3 6
73 hrs.
09-Aug-92 15:06 Ada, E. Okla 2.2/IV 34.8 97.5 11 11 -3 12 hrs.
10-Aug-92 14:03 Duncan, Chickasha 2.9/IV 35.0 97.5 12 12 -2 12 hrs.
04-Oct-92 22:44 Enid 2.8/IV 36.4 97.5 8 7
31 hrs.
14-Jan-93 13:06 Enid, Jet, Wakita 3.1/IV 36.6 90.0 5 4
42 hrs.
10-Mar-93 19:15 McAlester 2.7/V 35.2 95.9 2 2
2 hrs.
28-Apr-94 21:29 Drumond, Enid 3.0/IV 36.3 98.1 3 3
3 hrs.
Bold type indicates a "Seismic Window" of increased, potential for earthquakes.
Underlined items for quakes within perigean spring tides with Sychroneity less than 37 hrs.
Mg = Magnitude
Int = Mercalli Intensity
Lat = North Latitude
Lon = West Longitude
e = Eclipse
FM = Date of Full Moon in relation to Quake
Per = Perigee = Date of Perigee in relation to Quake
NM = Date of New Moon in relation to Quake
Sync = Synchroneity is time difference between Syzygy (new or full stage of the Moon) and Perigee (On same day, only 2 to 5 times per year)
Jim Berkland, Geologist, Aug 12, 1997
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