scholarly journals Evidence of Wadati-Benioff zone triggering following the M w 7.9 Little Sitkin, Alaska intermediate depth earthquake of 23 June 2014

2015 ◽  
Vol 42 (15) ◽  
pp. 6269-6277 ◽  
Author(s):  
Kenneth A. Macpherson ◽  
Natalia A. Ruppert
Keyword(s):  
Benioff Zone ◽  
Intermediate Depth ◽  
Intermediate Depth Earthquake

Tectonic regimes and stress patterns in the Vrancea Seismic Zone: Insights into intermediate-depth earthquake nests in locked collisional settings

2021 ◽  
Vol 799 ◽  
pp. 228688
Author(s):  
Laura Petrescu ◽  
Felix Borleanu ◽  
Mircea Radulian ◽  
Alik Ismail-Zadeh ◽  
Liviu Maţenco
Keyword(s):  
Seismic Zone ◽  
Intermediate Depth ◽  
Stress Patterns ◽  
Intermediate Depth Earthquake

Earthquake nests as natural laboratories for the study of intermediate-depth earthquake mechanics

2012 ◽  
Vol 570-571 ◽  
pp. 42-56 ◽  
Author(s):  
Germán A. Prieto ◽  
Gregory C. Beroza ◽  
Sarah A. Barrett ◽  
Gabriel A. López ◽  
Manuel Florez
Keyword(s):  
Intermediate Depth ◽  
Earthquake Mechanics ◽  
Intermediate Depth Earthquake

Stochastic Strong Ground Motion Simulation of the Southern Aegean Sea Benioff Zone Intermediate‐Depth Earthquakes

2018 ◽  
Vol 108 (2) ◽  
pp. 946-965 ◽  
Author(s):  
Ch. Kkallas ◽  
C. B. Papazachos ◽  
B. N. Margaris ◽  
D. Boore ◽  
Ch. Ventouzi ◽  
...  
Keyword(s):  
Aegean Sea ◽  
Benioff Zone ◽  
Model Parameters ◽  
Waveform Data ◽  
Intermediate Depth ◽  
Stress Parameter ◽  
Finite Fault ◽  
Strong Ground Motion Simulation ◽  
Back Arc ◽  
Parameter Values

Abstract We employ the stochastic finite‐fault modeling approach of Motazedian and Atkinson (2005), as adapted by Boore (2009), for the simulation of Fourier amplitude spectra (FAS) of intermediate‐depth earthquakes in the southern Aegean Sea subduction (southern Greece). To calibrate the necessary model parameters of the stochastic finite‐fault method, we used waveform data from both acceleration and broadband‐velocity sensor instruments for intermediate‐depth earthquakes (depths ∼45–140  km) with M 4.5–6.7 that occurred along the southern Aegean Sea Wadati–Benioff zone. The anelastic attenuation parameters employed for the simulations were adapted from recent studies, suggesting large back‐arc to fore‐arc attenuation differences. High‐frequency spectral slopes (kappa values) were constrained from the analysis of a large number of earthquakes from the high‐density EGELADOS (Exploring the Geodynamics of Subducted Lithosphere Using an Amphibian Deployment of Seismographs) temporary network. Because of the lack of site‐specific information, generic site amplification functions available for the Aegean Sea region were adopted. Using the previous source, path, and site‐effect constraints, we solved for the stress‐parameter values by a trial‐and‐error approach, in an attempt to fit the FAS of the available intermediate‐depth earthquake waveforms. Despite the fact that most source, path, and site model parameters are based on independent studies and a single source parameter (stress parameter) is optimized, an excellent comparison between observations and simulations is found for both peak ground acceleration (PGA) and peak ground velocity (PGV), as well as for FAS values. The final stress‐parameter values increase with moment magnitude, reaching large values (>300  bars) for events M≥6.0. Blind tests for an event not used for the model calibration verify the good agreement of the simulated and observed ground motions for both back‐arc and along‐arc stations. The results suggest that the employed approach can be efficiently used for the modeling of large historical intermediate‐depth earthquakes, as well as for seismic hazard assessment for similar intermediate‐depth events in the southern Aegean Sea area.

Intermediate-depth earthquake faulting by dehydration embrittlement with negative volume change

Nature ◽  
2004 ◽  
Vol 428 (6982) ◽  
pp. 545-549 ◽  
Author(s):  
Haemyeong Jung ◽  
Harry W. Green II ◽  
Larissa F. Dobrzhinetskaya
Keyword(s):  
Volume Change ◽  
Intermediate Depth ◽  
Earthquake Faulting ◽  
Intermediate Depth Earthquake ◽  
Negative Volume

scholarly journals Large seismic faults in the Hellenic arc

1996 ◽  
Vol 39 (5) ◽  
Author(s):  
B. S. Papazachos
Keyword(s):  
Eastern Mediterranean ◽  
Large Earthquake ◽  
Mediterranean Area ◽  
Strike Slip ◽  
Benioff Zone ◽  
Fault Plane Solutions ◽  
Intermediate Depth ◽  
Hellenic Arc ◽  
Mediterranean Countries ◽  
Concave Part

Using information concerning reliable fault plane solutions, spatial distribution of strong earthquakes (Ms³ 6.0) as well as sea bottom and coastal topography, properties of the seismic faults (orientation, dimension, type of faulting) were determined in seven shallow (h < 40 km) seismogenic regions along the convex part of thc Hellenic arc (Hellenic trench) and in four seismogenic regions of intermediate depth earthquakes (h = 40-100 km) along the concave part of this arc. Except for the northwesternmost part of the Hellenic trench, where the strike-slip Cephalonia transform fault dominates, all other faults along this trench are low angle thrust faults. III thc western part of the trench (Zante-west Crete) faults strike NW-SE and dip NE, while in its eastern part (east Crete-Rhodos) faults strike WNW-ESE and dip NNE. Such system of faulting can be attributed to an overthrust of the Aegean lithosphere on the eastern Mediterranean lithosphere. The longest of these faults (L = 300 km) is that which produced the largest known shallow earthquake in the Mediterranean area (21 July 365, Ms = 8.3) which is located near the southwestern coast of Crete. The second longest such fault (L = l 70 km) is that which produced a large earthquake (December 1303, Ms = 8.0) in the easternmost part of the trench (east of Rhodos island). Both earthquakes were associated with gigantic tsunamis which caused extensive damage in the coast of many Eastern Mediterranean countries. Seismic faults of the intermediate depth earthquakes in the shallow part of the Benioff zone (h = 40- 100 km) are of strike-slip type, with a thrust component. The orientations of these faults vary along the concave part of the arc in accordance with a subduction of remnants of all old lithospheric slab from the convex side (Mediterranean) to the concave side (Aegean) of thc Hellenic arc. The longest of these faults (L = 220 km) is that which produced the largest known intermediate depth earthquake in the whole Mediterranean area (12 October 1856, M = 8.2) north of Crete. The second longest such fault (L = 160 km) produced a large earthquake (26 June 1926, M = 8.0) in the easternmost part of the concave part of the arc (near Rhodos). Both earthquakes caused very serious damage in several Eastern Mediterranean countries but were not associated with tsunamis.

scholarly journals Abundant aftershock sequence of the 2015 Mw7.5 Hindu Kush intermediate-depth earthquake

2018 ◽  
Vol 213 (2) ◽  
pp. 1121-1134 ◽  
Author(s):  
Chenyu Li ◽  
Zhigang Peng ◽  
Dongdong Yao ◽  
Hao Guo ◽  
Zhongwen Zhan ◽  
...  
Keyword(s):  
Aftershock Sequence ◽  
Intermediate Depth ◽  
Hindu Kush ◽  
Intermediate Depth Earthquake
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