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フィリピンM7.9
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投稿者 MR 日時 2012 年 8 月 31 日 22:24:59: cT5Wxjlo3Xe3.
 

情報発表時刻 2012年8月31日 22時10分
発生時刻 2012年8月31日 21時48分 ごろ
震源地 フィリピン付近
緯度 北緯10.9度
経度 東経127.1度
深さ ---
マグニチュード 7.9
http://typhoon.yahoo.co.jp/weather/jp/earthquake/

M7.9 - 93km E of Sulangan, Philippines
2012-08-31 12:47:34 UTC
PAGER - GREENShakeMap - VIIDYFI? - I
Google Earth KML
SummaryLocation and Magnitude contributed by: USGS, NEIC, Golden, Colorado (and predecessors)General

50 km
20 mi
Powered by Leaflet
10.828°N, 126.677°E
Depth: 34.9km (21.7mi)
Event Time

2012-08-31 12:47:34 UTC
2012-08-31 20:47:34 UTC+08:00 at epicenter
2012-08-31 21:47:34 UTC+09:00 system time
Nearby Cities

93km (58mi) E of Sulangan, Philippines
106km (66mi) ESE of Guiuan, Philippines
161km (100mi) ESE of Borongan, Philippines
174km (108mi) NE of Surigao, Philippines
746km (464mi) ESE of Manila, Philippines
Related Links

Additional earthquake information for Philippines
View location in Google Maps

Tectonic Summary

Seismotectonics of the Philippine Sea and Vicinity

The Philippine Sea plate is bordered by the larger Pacific and Eurasia plates and the smaller Sunda plate. The Philippine Sea plate is unusual in that its borders are nearly all zones of plate convergence. The Pacific plate is subducted into the mantle, south of Japan, beneath the Izu-Bonin and Mariana island arcs, which extend more than 3,000 km along the eastern margin of the Philippine Sea plate. This subduction zone is characterized by rapid plate convergence and high-level seismicity extending to depths of over 600 km. In spite of this extensive zone of plate convergence, the plate interface has been associated with few great (M>8.0) ‘megathrust’ earthquakes. This low seismic energy release is thought to result from weak coupling along the plate interface (Scholz and Campos, 1995). These convergent plate margins are also associated with unusual zones of back-arc extension (along with resulting seismic activity) that decouple the volcanic island arcs from the remainder of the Philippine Sea Plate (Karig et al., 1978; Klaus et al., 1992).

South of the Mariana arc, the Pacific plate is subducted beneath the Yap Islands along the Yap trench. The long zone of Pacific plate subduction at the eastern margin of the Philippine Sea Plate is responsible for the generation of the deep Izu-Bonin, Mariana, and Yap trenches as well as parallel chains of islands and volcanoes, typical of circum-pacific island arcs. Similarly, the northwestern margin of the Philippine Sea plate is subducting beneath the Eurasia plate along a convergent zone, extending from southern Honshu to the northeastern coast of Taiwan, manifested by the Ryukyu Islands and the Nansei-Shoto (Ryukyu) trench. The Ryukyu Subduction Zone is associated with a similar zone of back-arc extension, the Okinawa Trough. At Taiwan, the plate boundary is characterized by a zone of arc-continent collision, whereby the northern end of the Luzon island arc is colliding with the buoyant crust of the Eurasia continental margin offshore China.

Along its western margin, the Philippine Sea plate is associated with a zone of oblique convergence with the Sunda Plate. This highly active convergent plate boundary extends along both sides the Philippine Islands, from Luzon in the north to the Celebes Islands in the south. The tectonic setting of the Philippines is unusual in several respects: it is characterized by opposite-facing subduction systems on its east and west sides; the archipelago is cut by a major transform fault, the Philippine Fault; and the arc complex itself is marked by active volcanism, faulting, and high seismic activity. Subduction of the Philippine Sea Plate occurs at the eastern margin of the archipelago along the Philippine Trench and its northern extension, the East Luzon Trough. The East Luzon Trough is thought to be an unusual example of a subduction zone in the process of formation, as the Philippine Trench system gradually extends northward (Hamburger et al., 1983). On the west side of Luzon, the Sunda Plate subducts eastward along a series of trenches, including the Manila Trench in the north, the smaller less well-developed Negros Trench in the central Philippines, and the Sulu and Cotabato trenches in the south (Cardwell et al., 1980). At its northern and southern terminations, subduction at the Manila Trench is interrupted by arc-continent collision, between the northern Philippine arc and the Eurasian continental margin at Taiwan and between the Sulu-Borneo Block and Luzon at the island of Mindoro. The Philippine fault, which extends over 1,200 km within the Philippine arc, is seismically active. The fault has been associated with major historical earthquakes, including the destructive M7.6 Luzon earthquake of 1990 (Yoshida and Abe, 1992). A number of other active intra-arc fault systems are associated with high seismic activity, including the Cotabato Fault and the Verde Passage–Sibuyan Sea Fault (Galgana et al., 2007).

Relative plate motion vectors near the Philippines (about 80 mm/yr) is oblique to the plate boundary along the two plate margins of central Luzon, where it is partitioned into orthogonal plate convergence along the trenches and nearly pure translational motion along the Philippine Fault (Barrier et al., 1991). Profiles B and C reveal evidence of opposing inclined seismic zones at intermediate depths (roughly 70-300 km) and complex tectonics at the surface along the Philippine Fault.

Several relevant tectonic elements, plate boundaries and active volcanoes, provide a context for the seismicity presented on the main map. The plate boundaries are most accurate along the axis of the trenches and more diffuse or speculative in the South China Sea and Lesser Sunda Islands. The active volcanic arcs (Siebert and Simkin, 2002) follow the Izu, Volcano, Mariana, and Ryukyu island chains and the main Philippine islands parallel to the Manila, Negros, Cotabato, and Philippine trenches.

Seismic activity along the boundaries of the Philippine Sea Plate (Allen et al., 2009) has produced 7 great (M>8.0) earthquakes and 250 large (M>7) events. Among the most destructive events were the 1923 Kanto, the 1948 Fukui and the 1995 Kobe (Japan) earthquakes (99,000, 5,100, and 6,400 casualties, respectively), the 1935 and the 1999 Chi-Chi (Taiwan) earthquakes (3,300 and 2,500 casualties, respectively), and the 1976 M7.6 Moro Gulf and 1990 M7.6 Luzon (Philippines) earthquakes (7,100 and 2,400 casualties, respectively). There have also been a number of tsunami-generating events in the region, including the Moro Gulf earthquake, whose tsunami resulted in more than 5000 deaths.

More information on regional seismicity and tectonics
http://earthquake.usgs.gov/earthquakes/eventpage/usc000cc5m#summary  

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コメント
 
01. 2012年9月01日 01:27:16 : fdsaTcdaWg
311をも行なった日本のちきゅう号ドリラーズハウスの写真だが
http://img.asyura2.com/us/bigdata/up1/source/8603.jpg
米国及び米軍といった装備は微塵も無い。


フィリピンを拠点とする亜細亜マルキストフリーメーソン(欧米とは逆の日本人殺しフリーメーソン)が台湾客家族を資金源とし、日本人に襲いかかっている。


02. 2012年9月01日 07:26:34 : ALt4LUQ0Ds
ちょうど、テレビで気象兵器HAARPとイルミナティ、秘密結社のことを放送していたら
21:46分フィリピンで7,9の地震で日本に津波警報。3,11の時は14:46分に地震が来ました。
奇妙な一致なのか、また46分です。

03. 2012年9月01日 08:35:40 : QRDQsLPBIo
東北とフィリピンが動けば後は東京から沖縄だ!カリフォルニアも群発地震?環太平洋(火山)造山運動の1995年以降の今が最盛期だ。

日本人は海岸から30m以上の山村僻地の岩盤の上に住もう!!

私は浅間山が好きで仕方ない。但し浅間は大爆発の前に1カ月の助走期間があり、一か月をよそで過ごせる人は良い。


04. 2012年9月01日 11:11:55 : urKiPCkocY
フィリピンは日本よりも早く「他国軍の駐留を禁止する憲法」を可決した国ですが、「某国の言うとおりが一番なんです。」と常に言っていないとドゥーンと脅かされてしまうらしい。

05. 2012年9月02日 00:52:24 : F0V4oXDwA6
>21:46分フィリピンで7,9の地震で日本に津波警報。3,11の時は14:46分に地震が来ました。
>奇妙な一致なのか、また46分です。

投稿に「発生時刻 2012年8月31日 21時48分 ごろ」って書いてあるけどな。
46分と48分。奇妙な一致(笑)ですな。


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