5/26/2015 — West Coast Earthquake unrest — 4.4 Magnitude strikes North California

After a week of rare earthquake activity, including a 5.4M earthquake near Las Vegas Nevada, we now see a 4.4 magnitude earthquake has struck off the shores of Northern California.

4.4m california may 26 2015


This magnitude 4.4 earthquake struck directly along the Gorda Escarpment, which is an undersea volcanic ridge which extends off the Southern portion of the Axial Seamount.

The Axial seamount is currently erupting off the West coast of Oregon, confirmed by the USGS (on May 1, 2015) with multiple news reports, and international media coverage.


The location of the earthquake is no surprise, since we were watching for movement to strike Northern California in the 4.0M range.

A watch was issued for near San Francisco for a 4.0M earthquake on May 21, 2015, and May 23, 2015.


Over the past 7 days (up to May 26, 2015), we have seen the West coast show major seismic activity.  Multiple 4.0M+ earthquakes struck California, Nevada, Kansas, Oregon, and near Washington State.

4.4m california may 26 2015a

Four days ago (May 22, 2015) the whole of the West coast showed multiple 4.0M+ earthquake activity, as well as earthquakes at several dormant volcanoes throughout California, Nevada, Oregon, Washington State, and Wyoming.

This post was issued on May 22, 2015 showing the West coast activity:



Still two days left in the Earthquake forecast issued on May 21, 2015.  Watch the forecast for the West coast of the United States here:


Watch the West Coast earthquake update issued May 23, 2015 here:


Information on this 4.4M earthquake from the USGS:

Magnitude 4.4 mw
Location / uncertainty 40.655°N 124.680°W± 0.9 km
Depth / uncertainty 10.9 km± 1.3
Origin Time 2015-05-26 10:17:35.220 UTC
Number of Stations 86
Number of Phases 82
Minimum Distance 50.03 km (0.45°)
Travel Time Residual 0.19 sec
Azimuthal Gap 221°
FE Region Offshore Northern California (35)


Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s