Monthly Archives: April 2014

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 … Continue reading

Posted in cascadia, College Redwoods, earthquake, education, geology, plate tectonics, research, subduction, tsunami

Another triggered earthquake in the Solomon Islands

This is a very interesting part of the world, where subduction and transform faults interact with each other. The New Britain trench is linked to the New Hebrides trench with a plate boundary fault. Based on plate motions, this could … Continue reading

Posted in College Redwoods, earthquake, education, geology, plate tectonics, research, subduction

Solomon M 7.6 aftershocks

The aftershocks continue to light up the earthquake fault that is participating in the part of the three pronged swarm in this region, I mentioned earlier. Two deep swarm regions of compressional earthquakes in the north, with this strike slip … Continue reading

Posted in College Redwoods, earthquake, education, geology, plate tectonics, subduction

Solomon aftershocks are lining up!

This is an update to some material I posted earlier. The possible orietation of the M 7.6 earthquake may be revealing itself by the spatial pattern of aftershocks. This map shows some aftershocks. I placed the moment tensor here also. … Continue reading

Posted in College Redwoods, earthquake, education, geology, plate tectonics, subduction

These earthquakes, in the Solomons

Here is the latest in the story this April 2014. Another large magnitude earthquake has occurred in locations associated with the New Britain trench in the Solomon Islands. Here is the USGS website for this earthquake. There is some background … Continue reading

Posted in College Redwoods, earthquake, education, geology, plate tectonics, subduction

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 … Continue reading

Posted in College Redwoods, earthquake, education, geology, plate tectonics, research, subduction, tsunami

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 … Continue reading

Posted in College Redwoods, earthquake, education, geology, plate tectonics, research, subduction, tsunami

SCEC Animation of earthquakes in Southern CA 1983-2003

Here is an animation from the Southern California Earthquake Center that shows earthquake hypocenters in relation the SCEC fault model. By clicking on the map below, you will download a 24 mb avi file. Some browsers may open the video.

Posted in College Redwoods, earthquake, education, geology, plate tectonics, San Andreas

SCSN animation of the seismic waves from the Puente Hills Thrust fault

The Southern California Seismic Network published this animation. Robert Graves, with the URS corporation, created the simulation. The San Diego Super Computer Center also helped. They are all given proper credit in the animation. The animation shows the simulated seismic … Continue reading

Posted in College Redwoods, earthquake, education, geology, plate tectonics, research, San Andreas

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 … Continue reading

Posted in College Redwoods, earthquake, education, geology, plate tectonics, subduction, tsunami