Quake Watch 2014

a reply to: dreamfox1
thats my point, they might as well just show a 50km diameter radius circle off Oregon roughly where it might be and say "light earthquake west of oregon" for what use their initial posting is worth.

low 6 Tonga

www.iris.edu...

F-E Region: Tonga Islands
Time: 2014-04-26 06:02:20.9 UTC
Magnitude: 6.3
Epicenter: 174.71°W 20.78°S
Depth: 38 km
Status: M - manually revised
geofon.gfz-potsdam.de...

or

Date and time uncertainty:
26 April 2014 @ 06:02:20 (+/- 0.04 seconds) (UTC)
Magnitude:
Mwp: 6.32 (Preferred)
Mb: 5.85
Location (uncertainty)
Latitude: -20.834 (+/- 1.0479km)
Longitude: -174.153 (+/- 0.9699km)
Depth: 64 km (+/- 0.8434km)
www.ga.gov.au...

THIS INFORMATION HAS NOT YET BEEN FINALISED

The eastern side of the Pacific plate still seems uncomfortable in its current position.
Oh heck, it's just earthquakey around the Pacific basin.
Mag 5.0 Mb off the coast of Guatemala

Event Time

2014-04-26 13:33:21 UTC
2014-04-26 07:33:21 UTC-06:00 at epicenter
2014-04-26 09:33:21 UTC-04:00 system time
Location

14.183°N 92.294°W depth=83.5km (51.9mi)

Nearby Cities

37km (23mi) SSW of Ocos, Guatemala
41km (25mi) SSW of Suchiate, Mexico
55km (34mi) SSW of Ciudad Tecun Uman, Guatemala
72km (45mi) SW of Flores Costa Cuca, Guatemala
198km (123mi) WSW of Guatemala City, Guatemala

GFZ-Potsdam Mag 4.9 Mb

There also looks to be a new small swarm of microquakes at Long Valley.


Mag 5.0 Mb Kuril Islands

further to post : muzzy
haven't done one of these tables since 25/09/2013 !!!


while I was on the networks I seen this one, that most of the main networks seemed to have missed


they were 4687 km and 3 hours, 28 minutes and 46 seconds (using GEOFON data) apart

interactive map of both strong events
Tonga Islands;
Because of the different magnitude estimates the Radiated Energy Released varies by 49,359.53TTNT (where available Mw is used, if not Ms)
The estimated locations spread over 113.5 km West to East
Given the number of large quakes the Tonga Region has you would think its about time IRIS plopped a seismograph there, the nearest is Nuie Island 545.8 km away!
Looking at that Nuie graph again, looks like a couple of aftershocks, at approx. 12:58:20 and 15:33:20, but no one is showing those.

summary
strong 5.83-6.6mb, 6.1-6.4Mw, 5.9-6.2Ms earthquake near Tonga within 65km of -20.8,-174.24
thats about the accuracy we can expect from todays technology!!


Damnit GSRAS have taken the Ms off their page now, thats unusual, they rarely alter their lists, I thought it was strange that it went from 6.6mb to 5.9Ms when converted, usually it goes UP, not DOWN. Disregard the TTNT ER for GSRAS then, no use putting the mb TTNT, that would be like comparing apples with oranges and potatoes, mb converts to 119,786.62TTNT, double or quadruple the others, just doesn't work.
I'll change the map data

My brother is working in Alert Bay right now as an accountant, here is his description of the 6.6 that hit off Port Hardy.


The earthquake was unreal. It came in waves, each successive wave
stronger than the preceding wave. I could see the walls inside the
house swaying back and forth. I was on the phone with Jake when it
happened - told him I had to hang up and run outside. Outside in the
driveway, I could feel the waves in the ground under my feet. Two
neighbors living in Alert Bay for long periods (32 and 50 years
respectively) said they'd never felt anything that strong before up
here. And it was only a 6.6 earthquake.

a reply to: AlexanderM

120km isn't that far from the epicenter
6.5-6.6 is pretty strong, smaller 6's have destroyed cities.
sounds similar to the Cook Strait quakes we had last year, the ground moving in waves etc
lucky it was offshore.

People on the mainland, in some places, claimed to have felt that quake, it was on the news. I had a hard time believing it was felt on the mainland.

originally posted by: AlexanderM
People on the mainland, in some places, claimed to have felt that quake, it was on the news. I had a hard time believing it was felt on the mainland.

There is video footage of it. In the high-rises it picks it up more. I think it's because high-rises shake at a different frequency compared to smaller buildings so they are able to pick up on it more. Something like that.

What do you guy's think about the chance of this happening

Big 9 +

a reply to: Trillium
Cascadia; it's a near certainty, in my opinion.
Soon? I don't know.

a reply to: phoenixlights321
You're right about the frequency.
When the frequency content of the seismic waves are near the building's natural frequency, it has a resonant effect which tends to amplify the motion of the building.
Buildings 5-20 stories can be more susceptible to collapse because of this resonance.
MCEER

When I go on USGS and look at earthquakes over the last 30 days, there is a pretty straight line of quakes from Masset, Canada down to Ferndale, California. What do you guys think? Right along the plate boundaries.

a reply to: phoenixlights321

thats wild looking. Take a look at Cobb / The Geysers Ca over the last week. 5 quakes all within about 6 miles of each other and shallow.

2.6
6km NW of The Geysers, California
2014-04-28 10:18:30 UTC-04:003.3 km
3.1
6km NW of The Geysers, California
2014-04-26 22:22:35 UTC-04:003.3 km
3.0
9km W of Cobb, California
2014-04-22 06:47:15 UTC-04:002.8 km
2.7
9km WNW of Cobb, California
2014-04-22 06:46:43 UTC-04:002.4 km
2.6
1km NNW of The Geysers, California
2014-04-21 19:49:30 UTC-04:002.0 k

Then zoom out to look at Ok compaired to the west coast over the past week. They are just starting fracking here in our area. Hope thats not what we have to look forward to

a reply to: phoenixlights321
That is called "background seismicity"
Anything under 4.5 is insignificant really, M3's can give a single wee bump if you are right on top of it, but anything less than 2.5 are rarely felt.
Switch to 30 days 4.5 plus, nothing to see on land!
Same with Geysers/Cobb that is pretty normal.
see Geysers for 31 days January 2014 to see whats "normal"
zoom out on that map to see the rest of the country.

www.isthisthingon.org...


Heads up,, something incomming,,





and why is this going backwards??




curiuos.

a reply to: BobAthome

There is nothing incoming. A number of them appear to be in straight-up error mode. See for yourself, plenty are operating normally while others definitely look borked.

a reply to: Nyiah

"There is nothing incoming" okey dokey.

a reply to: BobAthome
The Seizmos look pretty active and I think people have reason to watch and be wary of this beast. If it is just background noise fine, but if it is something else I would certainly want to know. Same with the activity at Cobb being that it is also a caldera, same goes for Clear Lake, Long Valley or the Salton Buttes.

a reply to: BobAthome

Yeah Bob, nothing incoming. As in, nothing remarkably different from the standard norm, and certainly not large enough to warrant a post about it. So, where is it, anyway? This "incoming" from 3 hours ago? I see nothing worth getting worked up over on the working seismos or EQ sites. Think of it this way. If there was anything going on that was major, it would be picked up clearly on other ones. It isn't, and there's a just those few that seem to need to be calibrated. A spazzy graph does not a rumbling Yellowstone make.

Sorry if I'm coming off as short, it's been a long day.

a reply to: Nyiah

yes,, 3 hrs,, uhummm ,,



this is current,, am i correct?

3 hrs