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The Salton Sea geothermal power plant in southern California might be one of the new hot spots of triggering a major earthquake. The power plant is placed in an area that interconnects two major faults, the San Andreas Fault (SAF)
Region: Hebgen Lake, Montana, USA
ML 7.7 [noaa] Mw 7.3 [p&s]
Ms 7.5 [abe] Ms 7.5 [p&s]
Depth: 15 km
Deaths: 28 Injuries: n/a
Catalog Source: noaa
This earthquake caused 28 fatalities and about $11 million in damage. It is characterized by extensive fault scarps, subsidence and uplift, a massive landslide, and a seiche in Hebgen Lake.
New fault scarps as high as 6 meters formed near Hebgen Lake. The major fault scarps formed along pre-existing normal faults northeast of Hebgen Lake. Subsidence occurred over much of an area that was about 24 kilometers north-south and about twice as long east-west. As a result of the faulting near Hebgen Lake, the bedrock beneath the lake was permanently warped, causing the lake floor to drop and generate a seiche. Maximum subsidence was 6.7 meters in Hebgen Lake Basin. About 130 square kilometers subsided more than 3 meters, and about 500 square kilometers subsided more than 0.3 meters. The earth-fill dam sustained significant cracks in its concrete core and spillway.
Minor damage occurred throughout southern Montana, northeast Idaho, and northwest Wyoming. Felt as far as Seattle, Washington, Banff, Canada, Dickinson, North Dakota, and Provo, Utah. This area includes nine Western States and three Canadian Provinces. Aftershocks continued for several months
The details of the Hebgen quake don't match up with the NOAA and USGS account
Originally posted by muzzy
Just after lunch yesterday NZST
Reference Number 3521672
Universal Time May 30 2011 at 0:42
NZ Standard Time Monday, May 30 2011 at 12:42 pm
Latitude, Longitude 38.04°S, 178.07°E
Focal Depth 70 km
Richter magnitude 5.5 (5.487ML)
20 km north-west of Tokomaru Bay
30 km south-west of Ruatoria
70 km north of Gisborne
320 km south-east of Auckland
USGS and EMSC ( who use NEIC data) didn't pick it up
GEOFON and GEOAU did
GEOFON have it offshore
F-E Region: Off E. Coast of N. Island, N.Z.
Time: 2011-05-30 00:42:26.6 UTC
Magnitude: 5.0 (mb)
Epicenter: 178.39°E 38.18°S
Depth: 51 km
Status: M - manually revised
and GEOAU have it 28.28km SE of where Geonet put it.
E. Coast of N. Island, New Zealand.
Magnitude: 5.2 (Mb)
Depth: 30 km
Tsunamigenic: Not available
Date and Time
UTC: 30 May 2011 @ 00:42:26
AEST: 30 May 2011 @ 10:42:26
Coordinates: -38.260, 178.233
This quake was located 17.3km WNW of the 5.281ML quake of 2011/3/25.
There has only been one aftershock so far, a 2.974ML 2km to the SE of the Main Quake.
I was reading on ANSS that;
Since no two networks will locate an earthquake at the exact same location and time, we use the following critera to decide whether any 2 solutions represent the same earthquake:
* The two solutions must be submitted by different networks. We assume that each network has eliminated duplicate solutions to the same event within their own catalog.
* The two solutions must be within 100 km and within 16 seconds of each other.
Soooooooo differences in this case of 28km, and 32km are therefore considered "accurate"
From late evening on Saturday 28 May until early Monday 30 May, a small swarm of earthquakes occurred in the southern part of Lake Taupo between Kuratau and Motuoapa. Twenty-seven earthquakes were recorded and they were all located at shallow depths (< 10 km). The largest earthquake had a magnitude of 2.4, but they were mostly between magnitudes 1.7 and 2.2. Small swarms like this often occur within the central part of New Zealand and are likely to be associated with occasional movement on small faults in the southern part of the lake. We believe they are due to the normal extensional processes (stretching and thinning of crust) that occur in the Taupo Volcanic Zone. There is no evidence that the earthquakes are related to a change of volcanic activity.
Originally posted by crazydaisy
reply to post by StarTraveller
The 6.3 Japan quake was on land, not sure of population.
Hope it didn't cause further casualties and damage.
Originally posted by MountainEnigma
Apparently, it does not let you back in time to review, but there are some links that are showing activity. And they have some links inoperable. Is that because there is more activity going on than they care to let us know about?
Anyone care to dispute the importance of this activity?
Originally posted by Shenon
reply to post by PuterMan
This one might be interesting for you (and which some of you already suspected i guess)
New faultline found beneath Canterbury