Source mechanism of volcanic earthquakes

1981 ◽  
Vol 44 (3) ◽  
pp. 491-497 ◽  
Author(s):  
R. Schick
Keyword(s):  
Source Mechanism ◽  
Volcanic Earthquakes

REVISITING THE SOURCE MECHANISM OF THE AD 365 EARTHQUAKE CRETE, GREECE, AND IMPLICATIONS FOR EASTERN MEDITERRANEAN TECTONICS

2020 ◽  
Author(s):  
Sean Gallen ◽  
◽  
Richard Ott ◽  
Karl W. Wegmann ◽  
Frank J. Pazzaglia ◽  
...  
Keyword(s):  
Eastern Mediterranean ◽  
Source Mechanism

Diagnosis of Time of Increased Probability (TIP) for Volcanic Earthquakes at Mt. Vesuvius

2006 ◽  
Vol 163 (1) ◽  
pp. 19-39 ◽  
Author(s):  
I. Rotwain ◽  
G. De Natale ◽  
I. Kuznetsov ◽  
A. Peresan ◽  
G. F. Panza
Keyword(s):  
Volcanic Earthquakes ◽  
Time Of Increased Probability

scholarly journals The stop-start control of seismicity by fault bends along the Main Himalayan Thrust

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Sharadha Sathiakumar ◽  
Sylvain Barbot
Keyword(s):  
Seismic Hazards ◽  
Geodetic Data ◽  
Source Mechanism ◽  
Seismogenic Zone ◽  
Seismic Cycle ◽  
Rupture Propagation ◽  
Alternative Models ◽  
Nepal Earthquake

AbstractThe Himalayan megathrust accommodates most of the relative convergence between the Indian and Eurasian plates, producing cycles of blind and surface-breaking ruptures. Elucidating the mechanics of down-dip segmentation of the seismogenic zone is key to better determine seismic hazards in the region. However, the geometry of the Himalayan megathrust and its impact on seismicity remains controversial. Here, we develop seismic cycle simulations tuned to the seismo-geodetic data of the 2015 Mw 7.8 Gorkha, Nepal earthquake to better constrain the megathrust geometry and its role on the demarcation of partial ruptures. We show that a ramp in the middle of the seismogenic zone is required to explain the termination of the coseismic rupture and the source mechanism of up-dip aftershocks consistently. Alternative models with a wide décollement can only explain the mainshock. Fault structural complexities likely play an important role in modulating the seismic cycle, in particular, the distribution of rupture sizes. Fault bends are capable of both obstructing rupture propagation as well as behave as a source of seismicity and rupture initiation.

Source mechanism and triggered large aftershocks of the Mw 6.5 Ambon, Indonesia earthquake

2021 ◽  
Vol 799 ◽  
pp. 228709
Author(s):  
David P. Sahara ◽  
Andri D. Nugraha ◽  
Abdul Muhari ◽  
Andi Azhar Rusdin ◽  
Shindy Rosalia ◽  
...  
Keyword(s):  
Source Mechanism

Estimation of rockburst wall-rock velocity invoked by slab flexure sources in deep tunnels

2014 ◽  
Vol 51 (5) ◽  
pp. 520-539 ◽  
Author(s):  
Shili Qiu ◽  
Xiating Feng ◽  
Chuanqing Zhang ◽  
Tianbing Xiang
Keyword(s):  
Rock Mass ◽  
Seismic Source ◽  
Friction Angle ◽  
Wall Rock ◽  
Assessment Method ◽  
Source Mechanism ◽  
Uniaxial Tensile ◽  
Roughness Coefficient ◽  
Support Design ◽  
True Triaxial

For rock support in burst-prone ground, the wall-rock velocity adjacent to the surface of underground openings is a vital support design parameter, and depends on the seismic source mechanism inducing rockburst damage. In this study, to estimate the wall-rock velocity evoked only by rock slab buckling (an important rockburst source mechanism), a comprehensive velocity assessment method is proposed, using an excellent slab column buckling model with a small eccentricity, which relies on a novel compressive or tensile buckling failure criterion of rock slab. The true-triaxial loading–unloading tests and rockburst case analyses reveal that rock mass slabbing induced by high rock stress has major impacts on the evolution and formation of buckling rockburst in deep tunnels. Using a method based on the energy balance principle, the slabbing thickness of intact rock mass is also calculated by an analytical method, which indicates that the slabbing thickness parameter has a nonlinear relation to the following six parameters: uniaxial tensile strength (UTS), uniaxial compressive strength (UCS), normal stress (σn), length of joint (L), friction angle ([Formula: see text]), and joint roughness coefficient (JRC). These proposed models and methods have been quite successfully applied to rockburst and slabbing cases occurring in deep tunnels. These applications show that slab flexure is an important source mechanism invoking high wall-rock velocities and leading to severe rockburst damages in the area surrounding deep tunnels.

Source Mechanism Study of Local Earthquakes in Kuwait

2017 ◽  
Vol 88 (6) ◽  
pp. 1465-1471 ◽  
Author(s):  
Chen Gu ◽  
Farah Al‐Jeri ◽  
Abdullah Al‐Enezi ◽  
Oral Büyüköztürk ◽  
M. Nafi Toksöz
Keyword(s):  
Source Mechanism ◽  
Mechanism Study ◽  
Local Earthquakes
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