This one is large and fairly deep. Here is the USGS web page for this earthquake. There are several aftershocks, the largest so far is M 6. Today’s earthquakes are located along the Aleutian subduction zone, nearby the Bolan Ridge…
Earthquake offshore Panama
Good sized earthquake offshore Panama! Here is the USGS page. This is probably an earthquake on an oblique high angle reverse fault, based on this early moment tensor. The hypocentral depth is pretty shallow too. This looks related to the…
1964 Great Alaska Earthquake: Before and After Photos
I just got back from a great Seismological Society Meeting in Anchorage, Alaska. The meeting was held there in part to celebrate the 50th anniversary of the 1964 Great Alaska Earthquake. I will post more online in the coming week.…
Vancouver Isle M 6.6 Earthquake
Interesting little swarm here, on the coast of northwestern Vancouver Island. The convergence of these plates results in the Cascadia subduction zone (CSZ), that extends from Cape Mendocino in the South to at least Haida Gwaii in the North (there…
Where is waldo?
This earthquake swarm is pretty interesting. We clearly have lots to learn about the tectonics of this region. One of the biggest mysteries yet to be solved is what fault the mainshock occurred on. The M 7.1, reported about early…
Panguna, Papua New Guinea: subduction zone earthquake
This looks to have shaken people up, just by looking at the intensity map below. These are generated automatically and take some assumptions that simplify the results (so the real shaking is probably not what the shake map intensity maps…
northern Chile M 8.2 earthquake series animations
As I mentioned in my earlier post, there were some foreshocks and have been aftershocks, related to this M 8.2 earthquake on the subduction zone fault offshore of northern Chile. This story may not yet be over… The aftershocks are…
all right, another M 6.2 aftershock in Chile
While I was writing my post about the M 7.6 aftershock, we got a M 6.2 aftershock. A M 6.2, while still large, is much smaller than a M 7.6. Each step in earthquake magnitude (e.g. from M 5 to…
large magnitude aftershock in northern Chile
There have been many aftershocks in the region of the 4/1/14 M 8.2 subduction zone earthquake offshore Iquique, Chile. There was a swarm of earthquakes up to M 6.7 in the weeks prior to the current main shock, here is…
M 8.2 northern Chile tsunamis recorded at tide gages
Here are some plots from PMEL comparing model predictions with observations at several tide gages in the Pacific Basin. Crescent City, CA Los Angeles, CA Honolulu, HI Hilo, HI Kahului, HI