東海地域とその周辺地域の地震活動（2007年11月～2008年4月）

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1 eismic Activity in and around Tokai Area (ovember 2007 April 2008) arthquake rediction Information Division, JMA M4 120M M M4.2 M4 420M M M ) 5 )

2 MM1.1M2.0M3.5M M M M M % M3.1

3 ) (1998).

4 ᶏ ධ㑐 ߩ 㔡ᵴ ᐕ 1 (a) ᶏ ධ㑐 ߦ ߒߚ 㔡ߩ 㔡ᄩಽᏓ㧔2007ᐕ11 㧕 Fig.1 (a) Monthly epicenter distribution in Tokai and outhern Kanto Districts (ovember 2007). 㪄㩷㩷㪉㪊㪌㩷㩷㪄

5 1(b) Fig.1 (b) Continued (December 2007).

6 ᶏ ධ㑐 ߩ 㔡ᵴ ᐕ 1 (c) ߟߠ߈㧔2008ᐕ1 㧕 Fig.1(c) Continued (January 2008). 㪄㩷㩷㪉㪊㪎㩷㩷㪄

7 1(d) Fig.1 (d) Continued (February 2008).

8 1(e) Fig.1 (e) Continued (March 2008).

9 1(f) Fig.1 (f) Continued (April 2008).

10 36 eriod:2007/11/01 00: /01/31 24:00 M D epth(km) 2(a) Fig.2 (a) Focal mechanism solutions of major earthquakes in Tokai and outhern Kanto Districts (ovember January 2008).

11 (b) Fig.2 (b) Continued (ovember 2007 January 2008).

12 (c) Fig.2 (c) Continued (ovember 2007 January 2008).

13 36 eriod:2008/02/01 00: /04/30 24:00 M D epth(km) 2(d) Fig.2 (d) Continued (February April 2008).

14 1 2008/02/01 17:03: H: 32KM M: /02/11 03:46: H: 54KM M: /02/11 07:45: H: 35KM M: /02/25 20:45: H: 53KM M: /02/25 23:31: H: 57KM M: /03/02 11:11: H: 20KM M: /03/05 06:41: H: 43KM M:2.9 T T T T T T T 8 TR DI LI AZM LG T /03/19 02:07: H: 42KM M:3.7 9 TR DI LI AZM LG T /03/24 17:19: H: 22KM M:2.8 TR DI LI AZM LG T /04/01 14:48: H: 89KM M: T TR DI LI AZM LG T /04/09 04:47: H: 51KM M: TR DI LI AZM LG T /04/20 01:00: H: 36KM M: TR DI LI AZM LG T /04/24 12:45: H: 53KM M: TR DI LI AZM LG T T T T T TR DI LI AZM LG T TR DI LI AZM LG T TR DI LI AZM LG T T TR DI LI AZM LG T TR DI LI AZM LG T TR DI LI AZM LG T (e) Fig.2 (e) Continued (February April 2008).

15 3 M Fig.3 eismic activity in the crust near the locked zone of the anticipated Tokai earthquake since 1997 (M 1.1). Right figures show activities of declustered earthquakes.

16 4 M Fig.4 eismic activity in the hilippine ea slab near the locked zone of the anticipated Tokai earthquake since 1997 (M1.1). Right figures show activities of declustered earthquakes.

17 Fig.5 Time series of seismic activity level in the locked zone of the anticipated Tokai earthquake since 1997.

18 6 M M Fig.6 eismic activity in the hilippine ea slab near the locked zone of the anticipated Tokai earthquake. The bottom figure shows seismic activity since eptember 1987 (M3.5). This figure shows the quiescence started late in 2001.

19 7 M Fig.7 eismic activity in crust in Aichi refecture since 1997 (M1.1). This area is adjacent to the locked zone of the anticipated Tokai earthquake. Right figures show activities of declustered earthquakes.

20 8 M Fig.8 eismic activity in the hilippine ea slab in Aichi refecture since 1997 (M1.1). This area is adjacent to the locked zone of the anticipated Tokai earthquake. Right figures show activities of declustered earthquakes.

21 Fig.9 Time series of eismic activity level in Aichi refecture since 1997.

22 10 Fig.10 Activity of declustered earthquakes in the hilippine ea slab near the Lake of Hamanako region.

23 11 M Fig.11 eismic activity in the uruga Bay since 1990 (M1.4). This area includes uruga Trough where the hilippine ea late should start subducting. Right figures show activities of declustered earthquakes.

24 Fig.12 Time series of eismic activity level in Hamanako and uruga Bay since 1995 and 1990, respectively.

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