In the past week, there has been a series of earthquakes in the New Britain trench. The largest quakes are M = 6.7 & 6.8. Now we might call those foreshocks to today’s M = 7.5 earthquake de Cinco de…
New Britain stays seismically active
We just had five M~5 earthquakes along the New Britain trench. The New Britain trench is formed by the subduction of the oceanic Solomon Sea microplate beneath the oceanic South Bismark microplate to the north. Here are the USGS web…
Coseismic Surface Deformation: Nepal
We just got an image with an estimate of coseismic surface deformation for the Nepal Earthquake.
Earthquake Pair in New Britain
Good Morning New Britain. Today we had a second M = 6.8 earthquake in as many days. Here are the USGS web pages for the 2015.04.30 and 2015.05.01 earthquakes. Here is my quick post from yesterday’s earthquake. Here is a…
Surface Displacement and Ground Motion Maps: Nepal
I have taken a couple products and combined them in google earth to help us learn about the impact of the Nepal 2015.04.25 Mw 7.8 earthquake. Here is the link to the USGS web page for this earthquake. I provide…
Nepal: PGA, DYFI, and the latest attenuation plot.
Well, data continue to come in. Below I plot the USGS Peak Ground Acceleration model results overlain upon the local map that I have been using to compare the current swarm of seismic activity with historic and prehistoric earthquake slip…
Updated Historic and Prehistoric Maps
I have updated a couple of these maps and include a figure from a recent presentation given by Roger Bilham at AGU (2011). Here was my original and first updated posts about this earthquake and here is my first compilation…
Historic Earthquakes in the Himalayas
I have digitized some compilations of earthquake slip regions from a few papers and summarize these on the map below. The two main references are Bilham (blue; 2004) and Bettinelli et al. (orange; 2006). There are a couple of earthquakes…
Nepal Aftershock Region and Historic Earthquakes
Here is an updated map that shows the aftershocks following the devastating earthquake in Nepal. I have tentatively plotted the locations (epicenters) of some historic earthquakes in this region. Today’s earthquake ranks among the largest and approaches the size and…
Earthquake in Nepal!
We just had a large earthquake in Nepal! The moment tensor shows that this is a thrust/reverse (originally it was solved as a strike slip) earthquake. I will need to do a little more investigating about this tomorrow. (I am…