Well, there was quite a buzz on social media following this small magnitude earthquake today. Here is the USGS web page for this Mw 3.3 earthquake. The earthquake appears to be related to the Newport-Inglewood fault system and the epicenter…
Blanco fracture zone strikes again
The Blanco fracture zone (BFZ) is a transform plate boundary that connects the Juan de Fuca ridge with the Gorda rise spreading centers. This active fault zone consists of numerous right-lateral (dextral) faults. There is some debate as to how…
Mendocino fault earthquake
We had a small magnitude earthquake “today” along the Mendocino fault system approximately 150 km west of Cape Mendocino. Here is the USGS web page for the Mw 4.8 earthquake. Based upon the tectonic setting, the hypocentral depth, and the…
New Britain and Bougainville: tectonic domains?
I was taking a looksie at the different moment tensors for the years of 2000, 2010, 2014, and March 2015. I noticed that the transform plate boundary on the eastern side of the South Bismarck plate may separate segments of…
New Britain trench swarm
There have been a few aftershocks. I have outlines the region of the subduction zone that appears to have slipped in this March 2015 swarm. Here was my first post about the main shock and the tsunami notifications. I have…
New Britain trench seismicity: 2000 through March 2015
I have here placed the moment tensors for the large magnitude earthquakes along the New Britain trench for the time period from 2000 through March 2015. Note that the Mw 8.0 has a strike-slip moment tensor. There is a transform…
New Britain Earthquake Tsunami Update
The tsunami threat has now passed. There has been a single record of this tsunami so far. This is from the Pacific Tsunami Warning Center here. If one is ever interested in looking up information about tsunami warnings, watches, or…
Earthquake in the New Britain trench
We just had a large magnitude earthquake in the New Britain region, probably on the megathrust (subduction zone fault). There was a swarm of seismic activity in this region in July and August of 2010. Further to the southeast, there…
Earthquake in the New Britain trench
We just had a large magnitude earthquake in the New Britain region, probably on the megathrust (subduction zone fault). There was a swarm of seismic activity in this region in July and August of 2010. Further to the southeast, there…
Chile earthquakes in the 2010 slip region
We had a small flurry of earthquake activity in Chile today, along the subduction zone there. Today’s activity is in the the region of the 2010 earthquake sequence. The largest magnitude earthquake in today’s sequence is a M = 6.2.…