scholarly journals Three-Dimensional Velocity Structure around the Focal Area of the 2021 MS6.4 Yangbi Earthquake

2021 ◽  
Vol 34 (0) ◽  
pp. 1-14
Author(s):  
Yunpeng Zhang ◽  
◽  
Weitao Wang ◽  
Wei Yang ◽  
Min Liu ◽  
...  
Keyword(s):  
Velocity Structure ◽  
Three Dimensional ◽  
Focal Area

scholarly journals Three-dimensional seismic velocity structure around the focal area of the 1978 Miyagi-Oki earthquake

2006 ◽  
Vol 33 (10) ◽  
pp. n/a-n/a ◽  
Author(s):  
Yojiro Yamamoto ◽  
Ryota Hino ◽  
Minoru Nishino ◽  
Tomoaki Yamada ◽  
Toshihiko Kanazawa ◽  
...  
Keyword(s):  
Velocity Structure ◽  
Seismic Velocity ◽  
Three Dimensional ◽  
Seismic Velocity Structure ◽  
Focal Area

scholarly journals P-wave crustal tomography of Greece with use of an accurate two-point ray tracer

1997 ◽  
Vol 40 (1) ◽  
Author(s):  
G. Drakatos ◽  
G. Karantonis ◽  
G. N. Stavrakakis
Keyword(s):  
Large Scale ◽  
Velocity Structure ◽  
Three Dimensional ◽  
Seismic Energy ◽  
Aegean Sea ◽  
P Wave ◽  
Low Velocity ◽  
Aegean Area ◽  
Arrival Times ◽  
Horizontal Variations

The three-dimensional velocity structure of the crust in the Aegean sea and the surrounding regions (34.0º-42.OºN, 19.0ºE-29.0ºE) is investigated by inversion of about 10000 residuals of arrival times of P-wave from local events. The resulting velocity structure shows strong horizontal variations due to the complicated crustal structure and the variations of crustal thickness. The northern part of the region generally shows high velocities. In the inner part of the volcanic arc (Southern Aegean area), relatively low velocities are observed, suggesting a large-scale absorption of seismic energy as confirmed by the low seismicity of the region. A low velocity zone was observed along the subduction zone of the region, up to a depth of 4 km. The existence of such a zone could be due to granitic or other intrusions in the crust during the uplift of the region during Alpidic orogenesis.

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