Posted on 06/26/2005 11:51:51 AM PDT by Atlas Sneezed
Magnitude ? (not yet determined)
Time Sunday, June 26, 2005 at 11:45:57 AM (PDT)
Sunday, June 26, 2005 at 18:45:57 (UTC)
Distance from Tahoe Vista, CA - 7 km (5 miles) N (353 degrees)
Kings Beach, CA - 9 km (5 miles) NNW (339 degrees)
Incline Village-Crystal Bay, NV - 12 km (7 miles) NW (308 degrees)
Reno, NV - 31 km (19 miles) SW (221 degrees)
Sacramento, CA - 148 km (92 miles) NE (55 degrees)
Coordinates 39 deg. 18.8 min. N (39.313N), 120 deg. 3.6 min. W (120.059W)
Depth 6.3 km (3.9 miles)
Location Quality Good
Location Quality Parameters Nst= 25, Nph= 25, Dmin=16 km, Rmss=0.1 sec, Erho=0.3 km, Erzz=1.6 km, Gp=126 degrees
Event ID# nc51161673
Additional Information 2-degree map
Topo map centered at earthquake (This link takes you offsite).
Sure felt it here in Reno.
I actually rocked here in my chair for a few seconds. Saw the preliminary red x on the map when I checked the earthquake site.
I'm in San Fran - Marina.
is that pretty big for Reno?
I'm in Carson City. We're full time RVers. And I accused my husband of shaking the 5th wheel to bug me.
Under 5.0, dog figures a squirrel tripped on an acorn.
For comparison sake, what I felt here was stronger and the rocking was more pronounced than that produced by the big ones up north a week or so ago.
The first one up north, I was not even certain it was a quake. I thought it could have been a bus going by, but I DID go straight to the EQ map, which I never seem to do when there is a quake. That one was barely perceptible, but I must have been highly aware at the moment.
The second one up north, I was fairly certain there was a quake and the rocking lasted much longer. 5 - 10 seconds.
This one in Reno, I was absolutely certain that there was a quake somewhere due to the strength of the rocking. It did not last quiie as long as the second quake up north though. Maybe 3 - 4 seconds?
There's my report - too lazy to fill it in the "Did you feel it" thing.
I should add that I'm liekly on a very sensitive spot. The 89 quake completely collapsed the building on the spot where my current building sits - people killed in it. The new one is like a fortress, but probably on very flexible / wobbly foundation to dissipate shock. I feel everything.
is that pretty big for Reno?
5.0 is a pretty good threshold of perceptibility. Above that, most everyone feels it. Much below, and it depends on circumstances.
5.0 is probably loud enough to hear. Anybody sitting down would probably notice some movement. Something that was about to fall over anyway might just fall over. It will be over before it can do much of anything significant. It's just a little reminder from Mother Nature, a postcard saying 'thinking of you.'
The earth calleth you....
I lost 15 pounds. All of it brown.
Pingaroonie!
Perhaps a bit too much information there! HA!
There's a significant risk of strong (even magnitude 7-7.5) quakes in the Reno-Tahoe area.
Including a risk of tsunamis on Lake Tahoe of up to 40 feet high.
What? I've never heard that before - are you serious? I always figured a big one might cause a crack that would drain the lake into the Carson Valley. Lakefront property would then be "canyonfront".
Completely serious...even posted on FR about it before.
http://www.seismo.unr.edu/htdocs/WGB/LakeTahoeTsunami/2colpaper.aw.pdf
The potential hazard from tsunami and seiche waves generatedby large earthquakes within Lake Tahoe, California-Nevada
Gene A. Ichinose and John G. Anderson
Nevada Seismological Laboratory, Reno, Nevada
Kenji Satake
Geological Survey of Japan, Earthquake Research Department, Tsukuba, Japan
Rich A. Schweickert and Mary M. Lahren
University of Nevada, Department of Geological Sciences, Reno, Nevada
Abstract. We investigate the potential of local earthquakes to
generate tsunamis and seiches within Lake Tahoe. We calculated
the long wavelength oscillations generated by 3 hypothetical Mw >
7 earthquake scenarios for faults with normal slip directly under
and outside the lake basin. The scenarios involving fault slip under
the lake are the North Tahoe-Incline Village and West
Tahoe-Dollar Point scenarios. The Genoa scenario involves a fault
that crops out 10 km east of the lake. Faulting beneath the lake
generates a tsunami followed by a seiche that continues for hours
with waves as large as 3 to 10 m. The seiche potentially threatens
low lying lakeside communities and lifelines. We also compare the
spectral characteristics of synthetic tide gauge records with wind
swell observations. The fundamental mode calculated for a seiche
is consistent with the wind swell observations.
Introduction
Large prehistoric earthquakes have occurred beneath Lake
Tahoe [Hyne et al., 1972; Schweickert et al., 1999]. Considering
the size and active tectonic history of Tahoe, it is reasonable to ask
if moment magnitude (Mw) 7 earthquakes can generate large
devastating tsunamis and seiches. In an enclosed basin, we will
refer to the tsunami as the initial wave produced by coseismic
displacement from an earthquake and the seiche as the harmonic
resonance within the lake.
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