Very strong M 7.3 earthquake struck South Sandwich Islands region

A vey strong earthquake with recorded magnitude of 7.3 (USGS and EMSC preliminary reports) struck south of South Sandwich Islands on July 15, 2013 at 14:03 UTC. Both USGS and EMSC measured depth at 30 km.
Epicenter was located at sea, 185km (115mi) SSE of Bristol Island, South Sandwich Islands and 2587km (1607mi) ESE of Ushuaia, Argentina at coordinates 60.600°S 25.400°W. It is also at a subduction zone where different complex plates are colliding.
There are no people living within 100 km radius. No widespread tsunami warning was issued.
The islands are volcanic and only occupied by birds (including all sorts of penguins).
ER reports no widespread tsunami is expected and an eventual local tsunami will be ok because the birds can fly and the sea lions and penguins can swim 🙂
This seismicity maps have been generated by concatenating the ISC catalogue (since 1964), the EMSC Euro-Med Bulletin catalogue and the EMSC Real Time catalogue. Therefore, they show the seismicity from 1964 until the earthquake occurrence.
Featured image: USGS/Leaflet
If you value what we do here, create your ad-free account and support our journalism.
Your support makes a difference
Dear valued reader,
We hope that our website has been a valuable resource for you.
The reality is that it takes a lot of time, effort, and resources to maintain and grow this website. We rely on the support of readers like you to keep providing high-quality content.
If you have found our website to be helpful, please consider making a contribution to help us continue to bring you the information you need. Your support means the world to us and helps us to keep doing what we love.
Support us by choosing your support level – Silver, Gold or Platinum. Other support options include Patreon pledges and sending us a one-off payment using PayPal.
Thank you for your consideration. Your support is greatly appreciated.
Sincerely,
Teo Blašković
Excellent materials!
Do you know if the strong ground motion records (accelerograms) exists for the main event M7.3?
Hi, thanks. We found only PGA, PGV and PSA maps from USGS.