Earthquake swarms in non-volcanic regions: What fluids have to say

2009 ◽  
Vol 36 (17) ◽  
Author(s):  
Karin Bräuer ◽  
Horst Kämpf ◽  
Gerhard Strauch
Keyword(s):  
Earthquake Swarms

Models of tremor and low-frequency earthquake swarms on Montserrat

2000 ◽  
Vol 101 (1-2) ◽  
pp. 83-104 ◽  
Author(s):  
J Neuberg ◽  
R Luckett ◽  
B Baptie ◽  
K Olsen
Keyword(s):  
Low Frequency ◽  
Earthquake Swarms

scholarly journals Interplay of seismic and aseismic deformations during earthquake swarms: An experimental approach

2012 ◽  
Vol 331-332 ◽  
pp. 215-223 ◽  
Author(s):  
O. Lengliné ◽  
J.E. Elkhoury ◽  
G. Daniel ◽  
J. Schmittbuhl ◽  
R. Toussaint ◽  
...  
Keyword(s):  
Experimental Approach ◽  
Earthquake Swarms

Earthquake swarms in Taiwan: A composite declustering method for detection and their spatial characteristics

2021 ◽  
Vol 574 ◽  
pp. 117160
Author(s):  
Wei Peng ◽  
David Marsan ◽  
Kate Huihsuan Chen ◽  
Erwan Pathier
Keyword(s):  
Earthquake Swarms ◽  
Spatial Characteristics

Tectonics and recent seismicity near Flathead Lake, Montana

1982 ◽  
Vol 72 (5) ◽  
pp. 1591-1599
Author(s):  
Anthony Qamar ◽  
Jerry Kogan ◽  
Michael C. Stickney
Keyword(s):  
Ice Sheet ◽  
Normal Faults ◽  
Earthquake Swarms ◽  
Flathead Lake ◽  
Glacial Processes ◽  
Cordilleran Ice Sheet ◽  
Large Earthquakes ◽  
East West

abstract Since 1900, more than 290 earthquakes have been reported near Flathead Lake, Montana. Surprisingly, none has exceeded magnitude 5 to 512. Most recent earthquake swarms appear to result from east-west or northwest-southeast extension along short fault segments west and north of the lake. Major normal faults like the Swan and Mission faults east of the lake may pose higher risk, but they appear dormant today. Deformation of sediments in Flathead Lake may be caused by several large earthquakes more than 10,000 years ago but is more probably due to glacial processes accompanying the last retreat of the Cordilleran ice sheet.

scholarly journals Event couple spectral ratio Q method for earthquake clusters: application to North-West Bohemia

2018 ◽  
Author(s):  
Marius Kriegerowski ◽  
Simone Cesca ◽  
Matthias Ohrnberger ◽  
Torsten Dahm ◽  
Frank Krüger
Keyword(s):  
Wave Attenuation ◽  
Attenuation Factor ◽  
Source Region ◽  
Spectral Ratio ◽  
Ratio Method ◽  
Earthquake Swarms ◽  
North West ◽  
High Attenuation ◽  
West Bohemia ◽  
Spectral Ratio Method

Abstract. We develop an amplitude spectral ratio method for event couples from clustered earthquakes to estimate seismic wave attenuation (Q−1) in the source volume. The method allows to study attenuation within the source region of earthquake swarms or aftershocks at depth, independent of wave path and attenuation between source region and surface station. We exploit the high frequency slope of phase spectra using multitaper spectral estimates. The method is tested using simulated full wavefield seismograms affected by recorded noise and finite source rupture. The synthetic tests verify the approach and show that solutions are independent of focal mechanisms, but also show that seismic noise may broaden the scatter of results. We apply the event couple spectral ratio method to North-West Bohemia, Czech Republic, a region characterized by the persistent occurrence of earthquake swarms in a confined source region at mid-crustal depth. Our method indicates a strong anomaly of high attenuation in the source region of the swarm with an averaged attenuation factor of Qp 

Sign in / Sign up

Export Citation Format

Share Document