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2014年11月22日長野県北部の地震
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1.地震について (Earthquake Information)

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2014/11/22,22:08:17.90 36.693 137.891 4.6 6.7
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Table1. Earthquake information. Origin time, Epicentral latitude, longitude, depth, and JMA magnitude from the left.(ref. Hi-net and JMA source mechanisms)

Fig.1. Event location.

2.観測点分布 (Station Distribution)

Fig.2. Station Distribution.

3.緊急地震速報発信状況 (Earthquake Early Warning Report)

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   [02] 14/11/22-22:08:17 6- M6.6 36.7N 137.9E 010km (14/11/22-22:08:26)
   [07] 14/11/22-22:08:17 6+ M6.8 36.7N 137.9E 010km (14/11/22-22:08:53)
   [08] 14/11/22-22:08:17 6+ M6.8 36.7N 137.9E 010km (14/11/22-22:09:13)
   [09] 14/11/22-22:08:17 6+ M6.8 36.7N 137.9E 010km (14/11/22-22:09:21)
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（左から順に情報番号，震源時，最大予測震度，マグニチュード，震央緯度，震央経度，震源深さ，電文発表時刻） from CEORKA
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Table2. Earthquake early warning reports. Information ID, Origin time, Maximum Intensity, JMA magnitude, Epicentral latitude, longitude, depth, and time to issue the report from the left.(ref. The Committee of Earthquake Observation and Research in the Kansai Area)

--> 気象庁による緊急地震速報の内容

4.観測記録 (Observed Records)

Fig.3. Peak Ground Acceleration (left) and Peak Ground Velocity (right).

Fig.4. JMA seismic intensity.

Fig.5. Population exposure. A circle size shows the population at the town, and a circle color shows the seismic intensity at the town.

Fig.6. Seismic activity of past 40 years.

5.解析結果 (Analytical Result)

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   NGN0051411222208 137.854 36.698 2.987 1.120 3.320 6.7 6.5
   NGNH281411222208 138.096 36.708 1.721 3.680 18.425 6.7 6.0
   NGNH341411222208 137.820 36.533 2.332 3.470 18.886 6.7 6.3
   NGNH271411222208 138.048 36.577 1.808 3.940 19.042 6.7 6.0
   NGN0061411222208 137.851 36.509 0.999 4.020 20.779 6.7 5.5
   NIGH171411222208 138.097 36.857 2.030 4.850 25.840 6.7 6.1
   NGNH331411222208 137.964 36.460 1.669 5.330 26.684 6.7 6.0
   NGN0071411222208 138.119 36.534 1.335 4.900 26.983 6.7 5.7
   NIGH161411222208 137.848 36.938 3.210 4.910 27.436 6.7 6.5
   NGN0041411222208 138.194 36.649 1.863 5.350 27.513 6.7 6.1
   Observed/Estimated Mw(median) tauc 6.7 6.05 1.8
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Table3. Analytical results using Tau_c method (Wu and Kanamori, 2005). Station ID, Station longitude, latitude, tauc, P-arrival time, epicentral distance(km) , magnitude, and estimated magnitude from the left.

Fig.7. Time history of the estimates for source parameters by the IPF method (Wu et al., 2014). The error of epicenter, depth, error of origin time, JMA magnitude are shown. X-axis shows the time after the closest o'clocck sharp.