This earthquake happened last night as I was preparing course materials for this morning. Initially it was a magnitude 6.9, but later modified to be M 6.9. This earthquake happened in an interesting region of the world where there is…
Good Friday Earthquake 27 March 1964
In March of 1964, plate tectonics was still a hotly debated topic at scientific meetings worldwide. Some people still do not accept this theory (some Russian geologists favor alternative hypotheses; Shevchenko et al., 2006). At the time, there was some…
Earthquake Report: Bougainville and Solomons
In the past couple of weeks, there were some earthquakes in the equatorial western Pacific. Here are the USGS websites for the two largest earthquakes in the two regions. 2017.03.04 M 6.1 2017.03.19 M 6.0 The M 6.1 was a…
Earthquake Report: New Britain
We just had an earthquake with a USGS magnitude of M 6.5 along the subduction zone formed by the convergence of the Solomon Sea plate on the south and the South Bismarck plate on the north. Here is the USGS…
Earthquake Report: Banda Sea
Earlier this week there was a moderate earthquake along a strike-slip fault that appears to adjoin the Banda/Timor/Java Arc with New Guinea. This strike-slip fault appears to cross oblique to the subduction zone that forms the Timor Trench to the…
Earthquake Report: Alaska
We had an earthquake a few days ago along the Cook Strait west of Anchorage, Alaska. This earthquake happened nearby a couple earthquakes from the past 2 years that have similar senses of motion along faults that seem to be…
Earthquake Report: EOTD Chile M 8.8 2010.02.27
Earthquake of the Day: 2010.02.27 M 8.8 Maule, Chile. There was an earthquake with a magnitude of M 8.8 on this day in 2010. I have prepared an interpretive poster that shows the extent of ground shaking modeled for this…
Earthquake Report: 1700 Cascadia subduction zone 317 year commemoration
Today (possibly tonight at about 9 PM) is the birthday of the last known Cascadia subduction zone (CSZ) earthquake. There is some evidence that there have been more recent CSZ earthquakes (e.g. late 19th century in southern OR / northern…
Earthquake Report: Celebes Sea!
Catching up on some earthquake reports on a Friday night. This earthquake happened on 2017.01.10 in a region to the west of the Molluca Strait. I have reported on Molucca Strait earthquakes several times before as this is a very…
Earthquake Report: Arctic!
Well, I put this and my next earthquake report together shortly after these earthquakes happened, but I was otherwise busy before I could present them online. There was an earthquake in the Arctic on 2017.01.08, along the channel of one…