Monday, September 8, 2014

Oregon's Mount Hood Rumbles.

Oregon's Mount Hood, one of the famed Cascades volcanoes, has produced a few shallow earthquakes below the summit. What this means is uncertain, but it is probably typical of the volcano. Mt Hood last erupted in 1866 although there are some unconfirmed reports of eruptions in the very early 1900's. A magnitude 2.6 quake occurred below the summit at 3.7km depth, and a much shallower 2.1 one at 0.9km depth. There are currently no reports on these quakes at CVO or USGS.

At this time it is unlikely this means an eruption is occurring, but it could mean anything.


Google Earth with USGS overlay showing 2.6 quake near summit of Mt Hood, Oregon, USA



Images from CVO website showing approximate magnitudes and depths.

Earthquake swarms are common at Mt Hood, they are not out of the ordinary. If these were volcanic quakes, there would probably be a lot more of them. Hood is a very well monitored volcano, as it has the potential to be very dangerous if it erupts. Like most Cascades range volcanoes, it is covered with glaciers, which can be a problem if lava comes into contact with it, or melts the ice. Lahars, landslides, and ash are all potential hazards if Hood ever erupts.

the last large quake at Hood was a magnitude 4.5 in 2002, which occurred beneath the summit at a depth of around 4.5km. This of course did not result in an eruption.

Right now it's way too soon to tell if this means anything or not, but as with all USA mainland volcanoes, it's best to remain vigilant and keep up to date with their goings-on.



No comments:

Post a Comment

Comments are moderated. See the comment policy for details.