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Ivins (2002) and Rundle and Kellogg (2002) argue, instead, that earthquake systems have “memory,” with large earthquakes moving the crust away from SOC through “stress shadowing” (Fig-ure 2.1). This provides testable observations of seismicity and late seismic cycle deformation that could be measured both seismically and with radar interferometry (Figure 2.2). The stress shadow models for the earthquake cycle (Figure 2.1) predict that when the surrounding crust is moved away from SOC less background seismicity is expected, but as a future earthquake approaches an increase in surrounding activity should occur. The basis for this model is the seismicity and stress shadow models derived for the large earthquake sequences of the 1990s described previously. The exciting aspect of these recent seismic cycle models is that they predict temporally and spatially varying deformation patterns in the termination regions of locked fault segments. These models can constrain earthquake fault system behavior, and should be of a magnitude measurable with radar satellite systems. Part of the model for individual faults and fault systems consists of sections that experience either continuous or transient creep. Creep, or aseismic slip, describes slip on fault surfaces that does not produce seismic waves, or discernible shaking. While some creeping fault segments are recognized, and several such segments are monitored locally in wellinstrumented regions such as California, many creeping faults are still unknown. InSAR is a valuable measurement technique for detecting and measuring the spatial and temporal characteristics of creeping faults (Figures 2.3 and 2.4), including strike-slip faults
Tara,
Extending further south is definitely an interest of ours, but there are issues to work around regarding data flow between different networks. The stations down there are beyond the PNSN's network.
The evidence is mounting from here as well as other subduction zones around the world that these tremors represent the plates slowing slipping past one another and has nothing to do with magma. And there's no other seismic evidence to suggest such a magma body exists. I wouldn't worry too much it....
I wouldn't worry too much it....
Originally posted by whiteblack
Link here
"Last night it was really bad," said MaKenzie. "We went outside and it was almost like it was vibrating your eardrums."
The Ontario Ministry of the Environment has ruled out industrial sources as the culprit, but Coun. Al Maghnieh wants to know why. "They're not giving us answers,"
"It's just frustrating," said Jeff Temple, who lives in a basement unit. "I want to know what's causing my walls to vibrate."
I have heard about this before but seem getting worse now. It's one of these mysterious that hasn't been solved yet. Strange, isn't it?
Just a quick update, literally have to log off ASAP, but time is of the essence here. This is what was forecast yesterday, foreshock within 72 to 96 hours:
Magnitude
4.1
Date-Time
Wednesday, September 14, 2011 at 14:44:51 UTC
Wednesday, September 14, 2011 at 07:44:51 AM at epicenter
Time of Earthquake in other Time Zones
Location
33.953°N, 117.076°W
Depth
16.9 km (10.5 miles)
Region
GREATER LOS ANGELES AREA, CALIFORNIA
Distances
9 km (6 miles) SSW (196°) from Yucaipa, CA
10 km (6 miles) WNW (289°) from Beaumont, CA
13 km (8 miles) SSE (162°) from Mentone, CA
14 km (9 miles) ENE (78°) from Moreno Valley, CA
109 km (67 miles) E (96°) from Los Angeles Civic Center, CA
Location Uncertainty
horizontal +/- 0.2 km (0.1 miles); depth +/- 0.4 km (0.2 miles)
Parameters
Nph=145, Dmin=9 km, Rmss=0.21 sec, Gp= 32°,
M-type=local magnitude (ML), Version=3
I hope no one is doubting me any longer. More to come.
Please prepare.
Just a quick update, literally have to log off ASAP, but time is of the essence here. This is what was forecast yesterday, foreshock within 72 to 96 hours:
Magnitude
4.1
Date-Time
Wednesday, September 14, 2011 at 14:44:51 UTC
Wednesday, September 14, 2011 at 07:44:51 AM at epicenter
Time of Earthquake in other Time Zones
Location
33.953°N, 117.076°W
Depth
16.9 km (10.5 miles)
Region
GREATER LOS ANGELES AREA, CALIFORNIA
Distances
9 km (6 miles) SSW (196°) from Yucaipa, CA
10 km (6 miles) WNW (289°) from Beaumont, CA
13 km (8 miles) SSE (162°) from Mentone, CA
14 km (9 miles) ENE (78°) from Moreno Valley, CA
109 km (67 miles) E (96°) from Los Angeles Civic Center, CA
Location Uncertainty
horizontal +/- 0.2 km (0.1 miles); depth +/- 0.4 km (0.2 miles)
Parameters
Nph=145, Dmin=9 km, Rmss=0.21 sec, Gp= 32°,
M-type=local magnitude (ML), Version=3
I hope no one is doubting me any longer. More to come.
Please prepare.
Originally posted by westcoast
"Time is of the essence..." pretty dramatic statement. Does this imply it is the last fore-shock?
ETA.....my dog that sensed the Japan quake has really been on edge the past three days. He is starting to spook me....barking right now at nothing. A high-pitch excited bark. He's done it on and off the past three days.
Originally posted by westcoast
There has been a TON of info ecvhanged in a very short time!!!