Microseismicity around rupture area of the 1944 Tonankai earthquake from ocean bottom seismograph observations
Microseismicity around rupture area of the 1944 Tonankai earthquake from ocean bottom seismograph observations
复制标题
从海底地震仪观测到的1944年东南海地震破裂区周围的微震活动
DOI：
10.1016/j.epsl.2004.02.032
复制
发表时间：
2004
影响因子：
5.3
通讯作者：
Y. Kaneda
中科院分区：
文献类型：
--
作者：
K. Obana;S. Kodaira;Y. Kaneda
沿着日本西南部的南开海槽，菲律宾海板块(PSP)俯冲到欧亚板块之下，板间大地震反复发生，重复发生的时间间隔约为100-200年。最近的一次大型逆冲事件发生在离岛不远的南开海槽东部，发生在1944年的托南凯地震。该地区目前地震活动性很低，陆地地震台网不能准确地确定震源。我们使用海底地震仪(OBSS)在1944年托南凯地震破裂区域周围进行了微震活动观测。震中是用基于AIRGRON-OBS地震调查的二维地震速度结构模型确定的。结果表明，地震活动在海槽轴附近相对活跃。这些地震可能与俯冲的菲律宾海板块的变形有关。另一方面，1944年托南凯地震破裂地区的微震活动很低。1944年托南凯地震同震破裂区的这种低水平地震活动很可能与基伊半岛附近的一个大凹陷有关。
Along the Nankai trough, southwestern Japan, the Philippine Sea plate (PSP) is subducting beneath the Eurasian plate, and large interplate earthquakes have occurred repeatedly with a recurrence interval of about 100–200 years. The most recent large thrust event in the eastern Nankai trough off Kii Peninsula was the 1944 Tonankai earthquake. In this region, current seismicity is very low and hypocenters are not determined accurately by the land seismic network. We conducted microseismicity observations around the rupture area of the 1944 Tonankai earthquake using ocean bottom seismographs (OBSs). Hypocenters were determined using a 2-D seismic velocity structure model based on an airgun-OBS seismic survey. Results obtained show that the seismicity was relatively active near the trough axis. These earthquakes may relate to deformation of the subducting Philippine Sea plate. On the other hand, microseismicity in the rupture area of the 1944 Tonankai earthquake was very low. This low-level seismic activity in the co-seismic rupture area of the 1944 Tonankai earthquake likely relates to a single large asperity off Kii Peninsula.
登录
查看更多内容
影响因子：
--
作者：
N. Takahashi;S. Kodaira;A. Nakanishi;Jin-Oh Park;S. Miura;T. Tsuru;Y. Kaneda;K. Suyehiro;H. Kinoshita;N. Hirata;T. Iwasaki
通讯作者：
N. Takahashi;S. Kodaira;A. Nakanishi;Jin-Oh Park;S. Miura;T. Tsuru;Y. Kaneda;K. Suyehiro;H. Kinoshita;N. Hirata;T. Iwasaki
影响因子：
--
作者：
A. Nakanishi;N. Takahashi;Jin-Oh Park;S. Miura;S. Kodaira;Y. Kaneda;N. Hirata;T. Iwasaki;Masao Nakamura
通讯作者：
A. Nakanishi;N. Takahashi;Jin-Oh Park;S. Miura;S. Kodaira;Y. Kaneda;N. Hirata;T. Iwasaki;Masao Nakamura
多道地震剖面推断南开海槽东部周边断裂配置
DOI：
--
发表时间：
2002
期刊：
Marine Geology 187
影响因子：
--
作者：
N.Takahashi;H.Amano;K.Hirata;H.Kinoshita;S.Lallemant;H.Tokuyama;F.Yamamoto;A.Taira;K.Suyehiro
通讯作者：
K.Suyehiro
影响因子：
3
作者：
Kikuchi, M;Nakamura, M;Yoshikawa, K
通讯作者：
Yoshikawa, K