1. 2005 年 3 月 20 日福岡県西方沖地震 Photo source: Yomiuri.comPresented by Dr. Takuya Watanuki

2. 2005/03/20 Mw:6.6 By Kamata(Kyoto Univ.)

3. Date : 05/03/20 10:53 (JST) Location: 33.90°N 130.20°E depth: 9 km Mj: 7.0 Mw : 6.6

4. 05/03/20 10:53 (JST) JMA hypo : 33.90N 130.20E 9.0km Mj7.0 (Strike, Dip, Rake) = (302, 87, -5) Seismic moment, Mo = 8.7x10**18 Nm (Mw = 6.6) Depth H = 12 km Source duration, T = 8 s by Y. YAMANAKA (ERI, Univ. of TOKYO)

5. Main shock Aftershocks Fukuoka city by Kyusyu university Kego fault

6. Active fault at Osano trench Active fault at Yakushi trench Kego( 警固） active fault Displacement rate : 4~7cm/1000years Interval : 15000-26000years Last active : 16000yBP~5000yBP Grade : C

7. By Japan Meteorological Agency Historical Earthquakes from AD 416