Very strong magnitude 7.7 earthquake struck Sea of Okhotsk


A very strong earthquake with recorded magnitude of 7.7 struck Sea of Okhotsk on August 14, 2012 at 2:59 UTC according to USGS. The earthquake had massive depth of 625.9 km (388.9 miles) so no tsunami is expected. Epicenter is located 158 km (98 miles) ENE of Poronaysk, Russia at coordinates 49.784°N, 145.126°E. Preliminary data showed magnitude 7.3 but USGS upgraded it to 7.7. EMSC still has initial magnitude of 7.3.

Following a huge earthquake like this there is a lot of possibilities of other strong aftershocks.

Magnitude 7.7
  • Tuesday, August 14, 2012 at 02:59:42 UTC
  • Tuesday, August 14, 2012 at 12:59:42 PM at epicenter
Location 49.784°N, 145.126°E
Depth 625.9 km (388.9 miles)
Distances 158 km (98 miles) ENE of Poronaysk, Russia
226 km (140 miles) ENE of Shakhtersk, Russia
236 km (146 miles) ENE of Uglegorsk, Russia
243 km (150 miles) ESE of Aleksandrovsk-Sakhalinskiy, Russia
Location Uncertainty horizontal +/- 14.5 km (9.0 miles); depth +/- 6.9 km (4.3 miles)
Parameters NST=999, Nph=999, Dmin=>999 km, Rmss=0.68 sec, Gp= 14°,
M-type=”moment” magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=B
  • Magnitude: USGS NEIC (WDCS-D)
    Location: USGS NEIC (WDCS-D)
Event ID usc000bz29

Historic seismicity

YouTube video

If you value what we do here, create your ad-free account and support our journalism.


Commenting rules and guidelines

We value the thoughts and opinions of our readers and welcome healthy discussions on our website. In order to maintain a respectful and positive community, we ask that all commenters follow these rules:

  • Treat others with kindness and respect.
  • Stay on topic and contribute to the conversation in a meaningful way.
  • Do not use abusive or hateful language.
  • Do not spam or promote unrelated products or services.
  • Do not post any personal information or content that is illegal, obscene, or otherwise inappropriate.

We reserve the right to remove any comments that violate these rules. By commenting on our website, you agree to abide by these guidelines. Thank you for helping to create a positive and welcoming environment for all.

Leave a reply

Your email address will not be published. Required fields are marked *