ogs.ou.eduOklahoma Geological Survey

OU Homepage Search OU The University of OklahomaHome About OGS Staff OPIC Research Publications Maps Data OGS App Technical Workshops Education and Outreach General Interest Contact Quicklinks Recent Earthquakes Report an Earthquake FAQ Twitter Facebook Tweets by @OKearthquakes Recent Earthquakes Latest OGS News February 2, 2024 OGS Statement on February 2, 2024 M5.1 Prague earthquake There was a M5.1 event at 11:24 PM local time last night located approximately 8 km to the northwest of Prague, OK. This event has been followed by several aftershocks in the intervening hours. There were reports of strong shaking in the immediate area and it was widely reported as being felt statewide, including the Oklahoma City and Tulsa metro areas. We should expect several strong aftershocks in the coming weeks that may be widely felt. Whereas most aftershocks are smaller than the mainshock, a very small fraction of aftershocks result in a larger earthquake than the main event. The seismic hazard remains high in the area. Citizens should secure valuables that might shake during possible strong aftershocks and practice Drop, Cover, and Hold On in the event of damaging events. The event occurred in nearly the same area as the 2011 M5.7 Prague earthquake that has been identified as having been induced by wastewater disposal activities. We will continue to monitor the seismicity and provide assistance to the Oklahoma Corporation Commission (OCC), other state agencies, and the public. The earthquake catalog is updated in real-time ( https://wichita.ogs.ou.edu/staff/earthquake/events.html ) and the state catalog is redundantly reported to USGS; USGS events within the state are derived directly from OGS earthquake locations and magnitudes since May 2019. The (OGS) is a state agency and a research organization of the University of Oklahoma. OGS monitors seismicity throughout the state; an effort that began with the Leonard Geophysical Observatory starting in the 1970s and continues today in Norman. Today, the seismic network encompasses 90+ seismometers that deliver real-time data to the central data hub in Norman. Analysts in Norman process the seismic data and deliver updated earthquake locations, magnitudes, and other scientific data products that are freely-available and shared through the OGS website ( http://ogs.ou.edu/ ) and through collaborative partners. Contact: Dr. Jake Walter, State Seismologist 405-325-8497 jwalter@ou.edu January 13, 2024 OGS Statement on January 12/13, 2024 earthquakes near Arcadia, OK There was a M4.3 event at 9:46 PM local time yesterday evening, followed by a M4.1 this morning, about 5:36 AM on January 13, 2024. There were reports of strong shaking in the immediate area and across Oklahoma City. The M4.4 yesterday evening was preceded by a M3.2 foreshock almost 10 minutes prior to the M4.4. In addition, there has been activity along this fault in the last month starting on December 29, with 5 events between M1.0-1.6 between December 29 and January 6. The seismicity from the last decade indicates there were 3 M4.0 or greater events in 2015 and 2017, corresponding to a time period when wastewater disposal volumes were higher. Whereas most aftershocks are smaller than the mainshock, a very small fraction of aftershocks result in a larger earthquake than the main event. The seismic hazard remains high in the area. Citizens should secure valuables that might shake during possible strong aftershocks and practice Drop, Cover, and Hold On in the event of damaging events. We will continue to monitor the seismicity and provide assistance to the Oklahoma Corporation Commission (OCC), other state agencies, and the public. The earthquake catalog is updated in real-time ( https://wichita.ogs.ou.edu/staff/earthquake/events.html ) and the state catalog is redundantly reported to USGS; USGS events within the state are derived directly from OGS earthquake locations and magnitudes since May 2019. The (OGS) is a state agency and a research organization of the University of Oklahoma. OGS monitors seismicity throughout the state; an effort that began with the Leonard Geophysical Observatory starting in the 1970s and continues today in Norman. Today, the seismic network encompasses 90+ seismometers that deliver real-time data to the central data hub in Norman. Analysts in Norman process the seismic data and deliver updated earthquake locations, magnitudes, and other scientific data products that are freely-available and shared through the OGS website ( http://ogs.ou.edu/ ) and through collaborative partners. Contact: Dr. Jake Walter, State Seismologist 405-325-8497 jwalter@ou.edu September 29, 2023 Registration is now open Geology Field Trip to the Wichita Mountains Click here to learn more April 6, 2023 OGS Statement on April 6, 2023 earthquake near Chandler, OK At nearly 4:00 AM local time, on April 6, 2023, a M4.0 earthquake occurred northwest of Chandler, OK. There were reports of strong shaking in the immediate area and across Tulsa, Oklahoma City, Norman, and Wichita. The M4.0 earthquake was preceded by 7 events beginning Tuesday evening and include activity in the last several years, with most previous earthquakes too small to be felt by people. At least 6 aftershocks have been recorded as of mid-day Thursday and there remains a high likelihood of more aftershocks for the next several days. Whereas most aftershocks are smaller than the mainshock, a very small fraction of aftershocks result in a larger earthquake than the main event. The seismic hazard remains high in the area. We will continue to monitor the seismicity and provide assistance to the Oklahoma Corporation Commission (OCC), other state agencies, and the public. The earthquake catalog is updated in real-time ( https://wichita.ogs.ou.edu/staff/earthquake/events.html ) and the state catalog is redundantly reported to USGS; USGS events within the state are derived directly from OGS earthquake locations and magnitudes since May 2019. The (OGS) is a state agency and a research organization of the University of Oklahoma. OGS monitors seismicity throughout the state; an effort that began with the Leonard Geophysical Observatory starting in the 1970s and continues today in Norman. Today, the seismic network encompasses 100+ seismometers that deliver real-time data to the central data hub in Norman. Analysts in Norman process the seismic data and deliver updated earthquake locations, magnitudes, and other scientific data products that are freely-available and shared through the OGS website ( http://ogs.ou.edu/ ) and through collaborative partners. OGS Workshop: Oklahoma and the Energy Transition Visit the workshop website Behind-the-Scenes Visit to the Sam Noble Museum Girl Scout Aleigha O. poses with some orthoceras fossils and her completed Mass Extinction Passport Book! The OGS, in collaboration with the Oklahoma Geological Foundation and the Sam Noble Museum of Natural History took the Girl Scouts of Western Oklahoma Geology Club (with funding from Devon Energy) on a behind-the-scenes tour of the Vertebrate Paleontology department , and the brand new Sahara Sea Monsters exhibit which is about to open to the public. This was an amazing way to explore their interests in STEM careers with wonderful role models, Tia Ruppert and Dr. Jac Lungmus! Sixty-six enthuiastic visitors enjoyed this experience, and we look forward to future collaborations between the OGS, OGF, SNMNH, and the Girl Scouts! Be prepared for an earthquake! Register for the Great ShakeOut (worldwide earthquake drill) today! If you’re a teacher looking for specific grade-appropriate videos, please click here. January 31, 2022 OGS Statement on January 31, 2022 earthquake near Medford Updated 12:30 PM January 31, 2022 Around 11:10 AM, local time, on January 31, 2022, a M4.5 earthquake occurred northwest of Medford, OK. There were reports of strong shaking in the immediate area and across Tulsa, Oklahoma City, Norman, and Wichita. The...