In this prior posting I’d wondered if the “action” in Nevada just north of Mammoth “Lakes” was, perhaps, a bit of volcanic “wakey wakey”… Then, in “Tips” up top, Scarlet Pumpernickel pointed to a similar pondering by others:
Some info on the volcano in USA that’s coming?
That link has a video, along with some text. The video is well worth watching. It states that there has been more than 9 quakes of 4.x scale. This means that several were right on top of each other and I didn’t notice the blue square staying blue… The film also says that Nevada state emergency folks are “preparing” and that the Feds are a bit antsy too:
Five Hundred plus earthquakes near Hawthorne, Nev. over the past week have scientists looking closer at the ground.
They are looking at seismic and volcanic activity in Nevada. What is the possibility of “the big one” hitting Nevada? Or a volcano popping-up in Nevada?
The images from the movie “Volcano” are extreme. But, could we see the explosions or lava flow like in this film happen in Nevada? Seismologist Graham Kent says a movie-like eruption is not likely. “The type of lava that comes out of Aurora crater is much more like the Hawaiian. It is not the explosive kind.”
Kent is talking about the Aurora Volcanic Field located just miles from the area where hundreds of quakes began rumbling a week ago. The center of those quakes, just eight miles from Hawthorne, Nev.
Kent says there has not been any significant volcanic activity there for 250,000 years. And there is not much risk of a catastrophic volcanic event.
But, there is risk of a big quake. The tremors are near Hawthorne, yet that does not mean Nevada state residence should ignore them. Kent says “this is a very significant sequence.”
The Division of Emergency Management in Carson City is in place for quick action should it be needed. “Both folks at state and federal level are concerned,” says Kent. All of this could be leading to a big quake in other parts of the state.
Story by: Brooke Boone
If Mammoth “Lakes” decides to blow, where does the ash fall?
OK, so I’ve been watching the “California and nearby” map for a few years now. It usually runs in the 100-200 quake count. (It is a 2 week sliding window, so as new quakes are added, others are ‘aging out’). In the last couple of months, the count has steadily risen. First through 300, then 400. About a week back I commented that it was over 500, and just a day or so ago I noticed it pass through 600. Right now, it’s at 701 total quakes.
I note that the “quake count” on the California map is now at 646. 3 days ago it was 572. A few months back it was in the 100-200 range. Things are difinitely on an upswing.
In the upper left corner, notice that “count” at 374. I thought that was “a bit high” at the time. Now? Now it looks small in comparison to this:
So when will this stop rising? Don’t know. But here is a “live map” so we can see when it happens.
Original Image, with captions and description. The original is interactive with clickable regions for ‘close ups’.
On 16 April 2011 I’d noted in the prior posting:
Notice that in this image, the total quake count is 233 while yesterday it was 163. We are racking up new quakes (even if very small ones) at a prodigious rate…
The live close up. Count pushing 300 as I post.:
Here is an alternative view of things with the fault lines highlighted. It includes all of Nevada, not just a degrees arc, so the quake count is a bit different in this view:
Special Note on Cascadia
In taking a peak at the Cascadia area, I noticed that it, too, had a bunch of quakes under the area where the volcanoes live:
Notice that those small quakes are inland from the plate boundaries and the major spreading and subduction faults. They are where the volcanos sprout after the subducting plate melts and makes rising magma.
Here is a live view:
And remember, I have a dedicated CSZ page with closeups
Just as a reminder, Iceland is continuing to build up a “cumulative seismic moment”:
Asia and Russia
h/t Chuckes in comments: Not seeing anything in the area, but as we’ve had a big volcanic “blow” in Kamchatcka, here is the Asia chart:
While we don’t want to forget about Japan, it has very much quieted down. So just one panel. If you want more detail, see:
Australia / New Zealand
This is a map of the Australia / Indonesia / New Zealand area:
Here is a “live view” of South America so you can watch anything “new” that develops there:
Some Volcano Stuff
http://pangea.stanford.edu/~dsinnett/Pages/Links.html has a nice collection of links to volcano monitor pages. Just click the pictures for the different volcano observatories.
The Smithsonian page: