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『翻訳家 山岡朋子ファンクラブ初代会長の日記』　より移行

2018年01月17日 隕石落下による地震？

　Meteorite fall 　隕石の一覧 ← ニアミスの小惑星は何事も無く通り過ぎたものの、その前の隕石落下は −−− / 2013-02-16


合衆国ミシガン州に隕石落下；



　National Weather Service: Bright light, loud sound over SE Michigan was 'a likely meteor'
　WXYZ-TV Detroit | Channel 7, 2018/01/16 に公開



目撃された 火球 に関しては；

隕石落下の衝撃？

M 2.0 Meteorite - 0km N of Walled Lake, Michigan / 2018-01-17 01:10:10 UTC 42.538°N 83.481°W 0.0 km depth
　USGS

　”Meteor seen and heard in Detroit area. Location is approximate. The experienced sound and shaking from this event was created in the atmosphere by the meteor and not the impact of the meteorite. The shaking detected by seismic and infrasound instruments originated in the atmosphere and not from the impact. Therefore the magnitude reported for this meteor cannot be directly used to compare its size to an earthquake because the source of the seismic signals are different.”

　※ 上掲注釈は、当初掲載されていなかった。（ならばついでに ”M 2.0 Meteor” と訂正すべきと思うけど） なお "meteor" と "meteorite" の違いは；

    • Meteor, Meteorite, Asteroid: What's the Difference?
      　by AMNH on 02/15/2013 11:35 am
      　”Meteors are not meteorites. Like meteorites, meteors are objects that enter Earth’s atmosphere from space. But meteors—which are typically pieces of comet dust no larger than a grain of rice—burn up before reaching the ground. As they vaporize, they leave behind the fiery trails sometimes called “shooting stars,” even though meteors are not really stars. The term “meteorite” refers only to those bodies that survive the trip through the atmosphere and reach Earth’s surface.”

      　※ すると今回の ”meteor” による地震もどきの衝撃は、 ”sonic boom” によるそれと同じ様なもの。


M 2.0 - SOUTHERN ONTARIO, CANADA - 2018-01-17 01:09:50 UTC
　CSEM - EMSC

大気圏突入後の空気との摩擦熱に耐えて地上まで到達した ”meteorite” に関しては；

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