H/t to Boballab http://chiefio.wordpress.com/t3/#comment-29832 for spotting the 3 quakes that have just happened on the Cascadia Fault. The detailed parameters of those quakes are in that comment so I’m not going to repeat them here. Suffice it to say it’s a good time to watch the Cascadia again to see if this is ‘business as usual’ or the start of something bigger. Watch for ‘aftershocks’ that are about the same size or increasing in frequency / distribution / strength…
This link: takes you to the dedicated CSZ page with closeups so you can see things happening in as much detail as you like.
The USA map must have a lower limit of measured quakes as the count is much higher. There’s quite a few ‘small ones’ scattered all over the place…
Here is a static image of what I’m seeing now:
I find this Pacific Ring Of Fire view interesting… there is activity all over the place including a rather large aftershock near Vanuatu.
A Static capture at the moment of the posting:
Magnitude 6.1 – VANUATU
2012 February 05 00:15:40 UTC
This event has been reviewed by a seismologist.Magnitude 6.1
Date-Time Sunday, February 05, 2012 at 00:15:40 UTC
Sunday, February 05, 2012 at 11:15:40 AM at epicenter
Time of Earthquake in other Time Zones
Location 18.935°S, 168.923°E
Depth 163.4 km (101.5 miles)
Distances 77 km (47 miles) NNW of Isangel, Tanna, Vanuatu
147 km (91 miles) SSE of PORT-VILA, Efate, Vanuatu
309 km (192 miles) NNE of Tadine, Loyalty Islands, New Caledonia
1882 km (1169 miles) ENE of BRISBANE, Queensland, Australia
Location Uncertainty horizontal +/- 14.1 km (8.8 miles); depth +/- 6.2 km (3.9 miles)
Parameters NST=314, Nph=375, Dmin=433 km, Rmss=0.87 sec, Gp= 25°,
M-type=teleseismic moment magnitude (Mw), Version=C
Source Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID usb0007w23
Australia / New Zealand
This is a live map of the Australia / Indonesia / New Zealand area:
There is also a rather odd ‘string of pearls’ of quakes across the middle of Asia:
Asia and Russia
A ‘static image’ that captures the several 5.x quakes scattered all over Asia / Pacific, including the string across the middle.
Quakes from 8 to 30 days ago
As New Zealand had some activity recently, I’m leaving this closeup in place. Just so it’s easy to keep an eye on it.
I’m promoting the Australia / New Zealand / Indonesia map up here to it’s easier to keep an eye on Indonesia as a broad active area.
Action Closer to Me
I felt the 3.x on the San Andreas near me but it wasn’t enough to get me looking at the quake page. Still, we’ve got ‘action’ in the Golden State. Note the cluster up near Geyserville is still very active.
As I live in California, it makes it easier for me if I keep them in the list where I can see what’s shaking near me.
Here is an alternative view of things with the fault lines highlighted:
This page lists historical quakes by year, with news headlines too. I’ve pointed the link at 2011, but other years are there to choose too.
Oddly, just clicking on years and looking how long the list is, I find that 2011 is longer than 2009 is longer than 2005 etc. It looks like, at a gross measure, quake activity is higher. (Presuming they have standard criteria for what makes the list…)
While this page says for the USA 2010 was larger (but global quakes under 4.5 have a 2009 cut off so those numbers are not comparable):
Map of Plates
You can see it is where plates collide here:
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: