کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4683394 | 1349304 | 2011 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Statistical analysis of seismicity in a wide region around the 1998 Mw 8.1 Balleny Islands earthquake in the Antarctic Plate Statistical analysis of seismicity in a wide region around the 1998 Mw 8.1 Balleny Islands earthquake in the Antarctic Plate](/preview/png/4683394.png)
A large earthquake (Mw 8.1) that occurred off the North Coast of the Antarctic continent near the Balleny Islands on 25 March 1998 was the largest intra-plate earthquake ever recorded in the Antarctic Plate. The earthquake hypocenter catalog for this area shows a marked change in seismicity following the main shock in a large area around the Balleny aftershock region. However, the earthquake catalog includes many aftershocks and is affected by a variable detection rate. To overcome these limitations, we applied statistical models and methods, including Gutenberg–Richter’s magnitude frequency distribution, the Epidemic-Type Aftershock Sequences (ETAS) model, and the space–time ETAS model, thereby enabling calculation of the change in detection rate. The results show a change in the spatial pattern of background seismicity over a large region after the 1998 event.
► We apply some statistical models and methods to the Balleny earthquake.
► We examine the background seismicity by the ETAS and space–time ETAS model.
► A change in the spacial and temporal distribution of the seismicity is indicated.
► We examine a change of the detection rate is indicated.
Journal: Polar Science - Volume 5, Issue 4, December 2011, Pages 421–431