I'm Sexy 0 Posted July 16, 2007 Share Posted July 16, 2007 Kowai ne. I hope all is ok. Link to post Share on other sites
charlotte 0 Posted July 16, 2007 Share Posted July 16, 2007 Yaaaaaaa, I was in Iiyama (Nagano between Nozawa/Nagano city)... luckily on the 1st floor of a modern building. But the place moved like nothing I've ever felt before. That was something I do NOT want to experience as well. Link to post Share on other sites
soubriquet 0 Posted July 16, 2007 Author Share Posted July 16, 2007 It's not about being fair, it's about being in a part of Japan where they have measured the highest strain rates. It's compressional too, which is very bad news. There's a very useful article here with some nice diagrams. http://cais.gsi.go.jp/Virtual_GSI/Tectonics/Niigata_Kobe/niigata_kobe.html Link to post Share on other sites
sanjo 2 Posted July 16, 2007 Share Posted July 16, 2007 Still not fair! I might take a look at that when I have calmed down a bit more. Thanks soubs Link to post Share on other sites
sunrise 0 Posted July 16, 2007 Share Posted July 16, 2007 glad you guys are okay. Link to post Share on other sites
muikabochi 208 Posted July 16, 2007 Share Posted July 16, 2007 OK here those I was shaking for 20 minutes or so there. I think Muikamachi is built on a base of jelly. Link to post Share on other sites
muikabochi 208 Posted July 16, 2007 Share Posted July 16, 2007 2 dead and over 250 injured so far it seems. Link to post Share on other sites
iiyamadude 6 Posted July 16, 2007 Share Posted July 16, 2007 I can indeed confirm it was a BLOODY BIG EARTHQUAKE!! Link to post Share on other sites
Curt 1 Posted July 16, 2007 Share Posted July 16, 2007 At least it seems that the aftershocks aren't off the chart like they were last time for you. Hope all are ok. Link to post Share on other sites
SerreChe 2 Posted July 16, 2007 Share Posted July 16, 2007 Glad did not go to Yuzawa this w/e in the end. Did not feel anything in Tokyo. I think I may have been driving at the time. Scary stuff. Never feels great to feel powerless and wondering how bad it's gonna be. Given how thin the SJ building is, must have been quite a ride. Was it built post or pre 1992? Link to post Share on other sites
SnowJapan Admin SnowJapan#Andrew 6 Posted July 16, 2007 SnowJapan Admin Share Posted July 16, 2007 Thanks. Yes it moved a lot. Not sure when it was built but I would guess pre-92. Happily I haven't felt any aftershocks since the main one this morning, unlike 04 when it was one every few minutes or so for the first few days! Link to post Share on other sites
SnowJapan Admin SnowJapan#Andrew 6 Posted July 16, 2007 SnowJapan Admin Share Posted July 16, 2007 I spoke too soon. Another strong one just a few minutes ago. Please stop. Link to post Share on other sites
soubriquet 0 Posted July 16, 2007 Author Share Posted July 16, 2007 I certainly felt that one too. Not as big the first but stuff was banging around in the house. Link to post Share on other sites
BagOfCrisps 24 Posted July 16, 2007 Share Posted July 16, 2007 Sorry to hear that I can only imagine what it is like. And enduring it for the second time must be rather annoying/worrying/other adjectives. Link to post Share on other sites
soubriquet 0 Posted July 16, 2007 Author Share Posted July 16, 2007 Here it is: I noticed on the lunchtime TV coverage that pretty well all of the collapsed buildings were old wooden structures, crucially with tiled roofs. When I put a 50m2 extension on my house, I calculated I lifted 2.5 tonnes of tiles up. A biggish house here could easily have 10 tonnes supported by some flimsy walls. Link to post Share on other sites
BagOfCrisps 24 Posted July 16, 2007 Share Posted July 16, 2007 That looks like a very wide area! Link to post Share on other sites
BagOfCrisps 24 Posted July 16, 2007 Share Posted July 16, 2007 I have an earthquake question. It may be stupid, I'm not sure. If you were on top of a mountain would you feel the moving as much as if you were down below? Link to post Share on other sites
joshnii 2 Posted July 16, 2007 Share Posted July 16, 2007 OK here too apart from being a bit shook up emotionally and a lot shook up physically. I'll tell you what in times like this keitai phones are TOTALLY USELESS. Public phones and the normal phone in the house was fine. But trying to call our or receive on keitai is a waste of time.... even now. Link to post Share on other sites
soubriquet 0 Posted July 16, 2007 Author Share Posted July 16, 2007 So that's all our Niigata friends accounted for A very good question, BoC. One I can't answer, but tsonda may. Places to avoid are ridges (re Pakistan) and sedimentary basin filled with saturated and poorly consilidated materials. The latter are prone to seismic amplification, as well as liquifaction. I had an exchange with tsonda about this in the Japan Earthquake Map thread. Link to post Share on other sites
joshnii 2 Posted July 16, 2007 Share Posted July 16, 2007 This thread I think http://www.snowjapanforums.com/ubbthreads.php/ubb/showflat/Number/109635 Link to post Share on other sites
thursday 1 Posted July 16, 2007 Share Posted July 16, 2007 Top of buildings here in HK are designed to move 2 feet when shaken. Not sure about the mountain question. Hope it quietens down for you guys soon. Be safe. Link to post Share on other sites
tsondaboy 0 Posted July 16, 2007 Share Posted July 16, 2007 Soubs was faster than me in answering. For sure you are not going to feel it the same. It depends a lot on the surface geology, how much will the amplitude of the waves be. If you are in the bottom of a basin, filed with loose sediments, then most probably the amplitude of the waves will become bigger when they reach that layer. On the top of a mountain you can hardly expect to find a long series of sediments, so most probably you won’t get the local structure effect that much. There are also many other factors, such as what kind of rocks you have as bedrock, rise angle of the waves, distance from the hypocenter etc... Link to post Share on other sites
joshnii 2 Posted July 16, 2007 Share Posted July 16, 2007 Thanks thursday. I can predict not much sleep tonight. Definitely having experienced this lot before I think it makes you more uneasy about it all. Link to post Share on other sites
soubriquet 0 Posted July 16, 2007 Author Share Posted July 16, 2007 Tsonda has confirmed what I had surmised. I think you'd get some kind of attenuation, mountains being pretty massive, like Link to post Share on other sites
SirJibAlot 0 Posted July 16, 2007 Share Posted July 16, 2007 and, the details....as always, you can drop the coordinates into Google Earth to get the epicenter location on the map...Coordinates are: 37.584N, 138.377E == PRELIMINARY EARTHQUAKE REPORT == ***This event supersedes event AT00117880. Region: NEAR WEST COAST OF HONSHU, JAPAN Geographic coordinates: 37.584N, 138.377E Magnitude: 6.7 Mw Depth: 49 km Universal Time (UTC): 16 Jul 2007 01:13:27 Time near the Epicenter: 16 Jul 2007 10:13:27 Location with respect to nearby cities: 70 km (43 miles) WSW (238 degrees) of Niigata, Honshu, Japan 106 km (66 miles) N (10 degrees) of Nagano, Honshu, Japan 145 km (90 miles) NNW (335 degrees) of Maebashi, Honshu, Japan 246 km (153 miles) NNW (331 degrees) of TOKYO, Japan ADDITIONAL EARTHQUAKE PARAMETERS ________________________________ event ID : US 2007ewac This event has been reviewed by a seismologist at NEIC For subsequent updates, maps, and technical information, see: http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/us2007ewac.php or http://earthquake.usgs.gov/ Link to post Share on other sites
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