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Spatial-temporal scanning and statistical test of accelerating moment

Spatial-temporal scanning and statistical test of accelerating moment release(AMR) using Australian earthquake data Yucang Wang, Can Yin, Peter Mora QUAKES. Outline. 1 Motivation 2 Seismicity in Australia 3 Methods 4 Results 5 Conclusions.

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Spatial-temporal scanning and statistical test of accelerating moment

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  1. Spatial-temporal scanning and statistical test of accelerating moment release(AMR) using Australian earthquake data Yucang Wang, Can Yin, Peter Mora • QUAKES

  2. Outline • 1 Motivation • 2 Seismicity in Australia • 3 Methods • 4 Results • 5 Conclusions

  3. Australian earthquakes of above 4.0 since 1960

  4. Australian earthquakes of above 5.0 since 1980

  5. Methods 1 retrospective fitting test with large events (Bufe,Varnes,1993) (Bowman,1998) optimal size Rc  minimum C and m

  6. No. Time Long. Lat. Mag. AMR or not ? m C Rc (Km) 1 1981/6/16 144.20 -38.90 5.1 Yes 0.25 0.45 125 2 1982/11/21 146.96 -37.20 5.4 Yes 0.42 0.60 150 3 1988/1/28 119.60 -21.05 5.0 No, few data 4 1989/10/13 122.43 -17.64 5.4 No, few data 5 1989/12/27 151.61 -32.95 5.5 Yes 0.25 0.55 175 6 1990/1/17 116.99 -31.72 5.5 Yes 0.25 0.62 125 7 1994/8/6 151.29 -32.92 5.3 No, too close to No.5 8 1996/9/25 146.47 -37.88 5.0 Yes 0.36 0.55 200 9 1997/3/5 138.97 -33.82 5.0 Yes 0.62 0.65 100 10 2000/8/29 146.29 -38.41 5.0 No, too close to No.8 11 2001/9/28 117.00 -30.50 5.1 Yes 0.47 0.60 100 12 2001/10/20 120.60 -33.60 5.2 No, few data

  7. 12 events chosen7 with sufficient data were preceded by AMR3 could not be analyzed due to insufficient data2 are too close to other events

  8. Scaling: Rc ~ M

  9. Scaling: fitting time ~ M

  10. R = 150Km 2 Spatial –temporal scanning of AMR • dx = dy = 0.1 degree, dt = 3 months

  11. 24 AMR sequences are found20 were followed by earthquakes of above 4.54 false alerms

  12. Conclusions and discussions 1 Our results support CPH 2 What control AMR ? fault system , loading rate

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