scholarly journals Internal structure of the San Jacinto fault zone at Jackass Flat from data recorded by a dense linear array

2017 ◽  
Vol 209 (3) ◽  
pp. 1369-1388 ◽  
Author(s):  
H. Qiu ◽  
Y. Ben-Zion ◽  
Z.E. Ross ◽  
P.-E. Share ◽  
F.L. Vernon
Keyword(s):  
Internal Structure ◽  
Fault Zone ◽  
Linear Array ◽  
San Jacinto Fault ◽  
San Jacinto Fault Zone

scholarly journals Internal structure of the San Jacinto fault zone at Blackburn Saddle from seismic data of a linear array

2017 ◽  
Vol 210 (2) ◽  
pp. 819-832 ◽  
Author(s):  
Pieter-Ewald Share ◽  
Yehuda Ben-Zion ◽  
Zachary E. Ross ◽  
Hongrui Qiu ◽  
Frank L. Vernon
Keyword(s):  
Internal Structure ◽  
Fault Zone ◽  
Seismic Data ◽  
Linear Array ◽  
San Jacinto Fault ◽  
San Jacinto Fault Zone

Structural Properties of the San Jacinto Fault Zone at Blackburn Saddle from Seismic Data of a Dense Linear Array

2018 ◽  
Vol 176 (3) ◽  
pp. 1169-1191 ◽  
Author(s):  
Pieter-Ewald Share ◽  
Amir A. Allam ◽  
Yehuda Ben-Zion ◽  
Fan-Chi Lin ◽  
Frank L. Vernon
Keyword(s):  
Structural Properties ◽  
Fault Zone ◽  
Seismic Data ◽  
Linear Array ◽  
San Jacinto Fault ◽  
San Jacinto Fault Zone

Internal structure of the San Jacinto fault zone at the Ramona Reservation, north of Anza, California, from dense array seismic data

2020 ◽  
Vol 224 (2) ◽  
pp. 1225-1241
Author(s):  
Lei Qin ◽  
Pieter-Ewald Share ◽  
Hongrui Qiu ◽  
Amir A Allam ◽  
Frank L Vernon ◽  
...  
Keyword(s):  
Internal Structure ◽  
Fault Zone ◽  
Seismic Data ◽  
Damage Zone ◽  
Normal Direction ◽  
Bimaterial Interface ◽  
Trapped Waves ◽  
San Jacinto Fault ◽  
Core Damage ◽  
San Jacinto Fault Zone

SUMMARY We image the internal structure of the San Jacinto fault zone (SJFZ) near Anza, California, with seismic data recorded by two dense arrays (RA and RR) from ∼42 000 local and ∼180 teleseismic events occurring between 2012 and 2017. The RA linear array has short aperture (∼470 m long with 12 strong motion sensors) and recorded for the entire analysed time window, whereas the RR is a large three-component nodal array (97 geophones across a ∼2.4 km × 1.4 km area) that operated for about a month in September–October 2016. The SJFZ at the site contains three near-parallel surface traces F1, F2 and F3 from SW to NE that have accommodated several Mw > 6 earthquakes in the past 15 000 yr. Waveform changes in the fault normal direction indicate structural discontinuities that are consistent with the three fault surface traces. Relative slowness from local events and delay time analysis of teleseismic arrivals in the fault normal direction suggest a slower SW side than the NE with a core damage zone between F1 and F2. This core damage zone causes ∼0.05 s delay at stations RR26–31 in the teleseismic P arrivals compared with the SW-most station, and generates both P- and S-type fault zone trapped waves. Inversion of S trapped waves indicates the core damaged structure is ∼100 m wide, ∼4 km deep with a Q value of ∼20 and 40 per cent S-wave velocity reduction compared with bounding rocks. Fault zone head waves observed at stations SW of F3 indicate a local bimaterial interface that separates the locally faster NE block from the broad damage zone in the SW at shallow depth and merges with a deep interface that separates the regionally faster NE block from rocks to the SW with slower velocities at greater depth. The multiscale structural components observed at the site are related to the geological and earthquake rupture history at the site, and provide important information on the preferred NW propagation of earthquake ruptures on the San Jacinto fault.

scholarly journals Internal structure of the San Jacinto fault zone in the trifurcation area southeast of Anza, California, from data of dense seismic arrays

2017 ◽  
Vol 213 (1) ◽  
pp. 98-114 ◽  
Author(s):  
L Qin ◽  
Y Ben-Zion ◽  
H Qiu ◽  
P-E Share ◽  
Z E Ross ◽  
...  
Keyword(s):  
Internal Structure ◽  
Fault Zone ◽  
Seismic Arrays ◽  
San Jacinto Fault ◽  
San Jacinto Fault Zone

scholarly journals Basic data features and results from a spatially dense seismic array on the San Jacinto fault zone

2015 ◽  
Vol 202 (1) ◽  
pp. 370-380 ◽  
Author(s):  
Yehuda Ben-Zion ◽  
Frank L. Vernon ◽  
Yaman Ozakin ◽  
Dimitri Zigone ◽  
Zachary E. Ross ◽  
...  
Keyword(s):  
Fault Zone ◽  
Seismic Array ◽  
Basic Data ◽  
San Jacinto Fault ◽  
San Jacinto Fault Zone ◽  
Dense Seismic Array
Sign in / Sign up

Export Citation Format

Share Document