Earthquake in Izu-Bonin!

Early this morning (luckily I was not awake at the time) we had a really deep (~677km) M = 7.8 extensional earthquake along the Bonin Trench in the western Pacific. Here is the USGS page for this earthquake.

Here is a map that shows the epicenter in red (due to the depth), along with the moment tensor for this earthquake. I also plot the general location of the 1944 Tōnankai and 1946 and Nankai Earthquakes. I also include a cross section for this subduction zone (also from the wikipedia page).

Here I have plotted the slab contours (Hayes et al., 2012).

Here is a regional tectonic map from the wikipedia site on this region.

There is more about the regional tectonics on the USGS page here.

Here is a map showing the general locations of the 1946 Tōnankai and 1944 Nankai Earthquakes.

Category(s): Chemeketa Community College, education, Extension, geology, HSU, plate tectonics, subduction, tsunami

4 Responses to Earthquake in Izu-Bonin!

2 Responses in other blogs/articles

  1. […] I put together a couple animations. My post about the deep mainshock (magnitude M = 7.8) is here. My second post has some aftershocks plotted (and some foreshocks), as well as a little more about […]

  2. […] 2015.05.30 First Post: map and cross section […]

Leave a Reply

Your email address will not be published.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