| 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 | ||||||||||