博文
震群的定义与实例
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震群在地震教科书上的定义并不严谨。根据我们的理解，震群事件可定义为在一个较小的区域范围内（属于同一个地震区）、1年左右的时间范围内，发生的一连串不同大小的地震事件。在震群事件中，往往有一个或两个震级显著较大的地震，称之为震群中的标志性地震事件。
通常认为，强震是断层中高强岩石发生宏观破裂的结果。岩石要发生宏观破裂，须经过岩石变形破坏过程的体积膨胀点，因此震群事件必然发生。震群事件是强震前唯一的、人类目前监测技术可识别的前兆现象。
以下是近些天来发生在PUERTO RICO的部分地震目录，这是一个典型的震群事件实例。
引自：
http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/quakes_all.php
Update time = Sun Dec 18 13:05:13 UTC 2011
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2.6 |
18.196 |
-67.354 |
15.2 |
MONA PASSAGE, PUERTO RICO |
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2.8 |
18.202 |
-67.364 |
13.8 |
MONA PASSAGE, PUERTO RICO | ||
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3.2 |
18.177 |
-67.367 |
17.7 |
MONA PASSAGE, PUERTO RICO | ||
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2.5 |
18.180 |
-67.356 |
15.9 |
MONA PASSAGE, PUERTO RICO | ||
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3.0 |
18.166 |
-67.366 |
12.4 |
MONA PASSAGE, PUERTO RICO | ||
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2.6 |
18.191 |
-67.307 |
16.0 |
MONA PASSAGE, PUERTO RICO | ||
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2.9 |
18.212 |
-67.346 |
18.1 |
MONA PASSAGE, PUERTO RICO | ||
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3.1 |
18.165 |
-67.375 |
17.8 |
MONA PASSAGE, PUERTO RICO | ||
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2.8 |
18.188 |
-67.372 |
11.8 |
MONA PASSAGE, PUERTO RICO | ||
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2.5 |
18.167 |
-67.369 |
19.2 |
MONA PASSAGE, PUERTO RICO | ||
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2.5 |
18.194 |
-67.340 |
15.6 |
MONA PASSAGE, PUERTO RICO | ||
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2.6 |
18.191 |
-67.342 |
17.2 |
MONA PASSAGE, PUERTO RICO | ||
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3.1 |
18.179 |
-67.371 |
16.2 |
MONA PASSAGE, PUERTO RICO | ||
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3.1 |
18.195 |
-67.380 |
16.8 |
MONA PASSAGE, PUERTO RICO | ||
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2.7 |
18.238 |
-67.355 |
13.2 |
MONA PASSAGE, PUERTO RICO | ||
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2.8 |
18.161 |
-67.368 |
16.6 |
MONA PASSAGE, PUERTO RICO | ||
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3.1 |
18.178 |
-67.366 |
21.5 |
MONA PASSAGE, PUERTO RICO | ||
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2.5 |
18.174 |
-67.382 |
16.3 |
MONA PASSAGE, PUERTO RICO | ||
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2.7 |
18.174 |
-67.377 |
24.0 |
MONA PASSAGE, PUERTO RICO | ||
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2.8 |
18.173 |
-67.362 |
21.2 |
MONA PASSAGE, PUERTO RICO | ||
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3.2 |
18.184 |
-67.394 |
7.6 |
MONA PASSAGE, PUERTO RICO | ||
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2.5 |
18.152 |
-67.397 |
17.2 |
MONA PASSAGE, PUERTO RICO | ||
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2.7 |
18.160 |
-67.391 |
15.1 |
MONA PASSAGE, PUERTO RICO | ||
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3.1 |
18.158 |
-67.365 |
16.0 |
MONA PASSAGE, PUERTO RICO | ||
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2.6 |
18.189 |
-67.357 |
13.0 |
MONA PASSAGE, PUERTO RICO | ||
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3.2 |
18.185 |
-67.380 |
17.0 |
MONA PASSAGE, PUERTO RICO | ||
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2.5 |
18.186 |
-67.355 |
12.0 |
MONA PASSAGE, PUERTO RICO | ||
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2.6 |
18.194 |
-67.367 |
15.6 |
MONA PASSAGE, PUERTO RICO | ||
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3.0 |
18.186 |
-67.319 |
7.2 |
MONA PASSAGE, PUERTO RICO | ||
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3.2 |
18.170 |
-67.165 |
41.0 |
PUERTO RICO | ||
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5.3 |
18.172 |
-67.371 |
17.0 |
MONA PASSAGE, PUERTO RICO | ||
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5.1 |
18.188 |
-67.370 |
14.0 |
MONA PASSAGE, PUERTO RICO |
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3.0 |
19.235 |
-67.582 |
19.2 |
PUERTO RICO REGION | ||
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2.8 |
19.146 |
-66.805 |
16.0 |
PUERTO RICO REGION | ||
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3.0 |
19.141 |
-66.850 |
32.5 |
PUERTO RICO REGION |
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2.8 |
18.003 |
-66.939 |
13.0 |
PUERTO RICO |
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3.2 |
19.101 |
-66.808 |
38.0 |
PUERTO RICO REGION |
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2.7 |
19.084 |
-67.402 |
1.7 |
PUERTO RICO REGION | ||
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3.1 |
19.237 |
-67.488 |
28.0 |
PUERTO RICO REGION | ||
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3.2 |
19.215 |
-67.462 |
18.4 |
PUERTO RICO REGION |
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2.5 |
18.288 |
-67.174 |
31.1 |
PUERTO RICO | ||
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3.1 |
18.566 |
-66.644 |
102.9 |
PUERTO RICO REGION |
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3.0 |
18.304 |
-68.037 |
4.5 |
MONA PASSAGE, DOMINICAN REPUBLIC | ||
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2.9 |
19.129 |
-66.792 |
13.8 |
PUERTO RICO REGION |
https://blog.sciencenet.cn/blog-575926-519732.html
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