scholarly journals Analysis of seismic magnitude differentials (m b−M w) across megathrust faults in the vicinity of recent great earthquakes

2012 ◽  
Vol 64 (12) ◽  
pp. 1199-1207 ◽  
Author(s):  
Teresa M. Rushing ◽  
Thorne Lay
Keyword(s):  
Great Earthquakes ◽  
Megathrust Faults ◽  
Seismic Magnitude

AN INCOMPLETE HISTORY OF LATE HOLOCENE GREAT EARTHQUAKES AT THE NEHALEM RIVER ESTUARY, CENTRAL CASCADIA SUBDUCTION ZONE

2017 ◽  
Author(s):  
Alan R. Nelson ◽  
◽  
Yuki Sawai ◽  
Andrea D. Hawkes ◽  
Simon E. Engelhart ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Late Holocene ◽  
River Estuary ◽  
Cascadia Subduction Zone ◽  
Great Earthquakes ◽  
History Of

Geological Evidence of Great Earthquakes along the Eastern Himalayan Foothills

2021 ◽  
Vol 97 (8) ◽  
pp. 823-826
Author(s):  
R. Jayangonda Perumal
Keyword(s):  
Geological Evidence ◽  
Great Earthquakes ◽  
Himalayan Foothills

Spatiotemporal clustering of great earthquakes on a transform fault controlled by geometry

2021 ◽  
Author(s):  
Jamie D. Howarth ◽  
Nicolas C. Barth ◽  
Sean J. Fitzsimons ◽  
Keith Richards-Dinger ◽  
Kate J. Clark ◽  
...  
Keyword(s):  
Transform Fault ◽  
Great Earthquakes ◽  
Spatiotemporal Clustering

Estimation of frictional properties and slip evolution on a long-term slow slip event fault with the ensemble Kalman filter: numerical experiments

2019 ◽  
Vol 219 (3) ◽  
pp. 2074-2096 ◽  
Author(s):  
Kazuro Hirahara ◽  
Kento Nishikiori
Keyword(s):  
Surface Displacement ◽  
Slip Rate ◽  
Slow Slip ◽  
Slow Slip Events ◽  
Actual Distribution ◽  
Frictional Properties ◽  
Data Analyses ◽  
Bungo Channel ◽  
Megathrust Faults ◽  
Gnss Data

Summary A variety of slow slip events at subduction zones have been observed. They can be stress meters for monitoring the stress state of megathrust faults during their earthquake cycles. In this study, we focus on long-term slow slip events (LSSEs) recurring at downdip portions of megathrust faults among such slow earthquakes. Data analyses and simulation studies of LSSEs have so far been executed independently. In atmosphere and ocean sciences, data assimilations that optimally combine data analyses and simulation studies have been developed. We develop a method for estimating frictional properties and monitoring slip evolution on an LSSE fault, with a sequential data assimilation method, the ensemble Kalman filter (EnKF). We executed numerical twin experiments for the Bungo Channel LSSE fault in southwest Japan to validate the method. First, based on a rate- and state-dependent friction law, we set a rate-weakening circular LSSE patch on the rate-strengthening flat plate interface, whose critical nucleation size is larger than that of the patch, and reproduced the observed Bungo Channel LSSEs with recurrence times of approximately 7 yr and slip durations of 1 yr. Then, we synthesized the observed data of surface displacement rates at uniformly distributed stations with noises from the simulated slip model. Using our EnKF method, we successfully estimated the frictional parameters and the slip rate evolution after a few cycles. Secondly, we considered the effect of the megathrust fault existing in the updip portion of the LSSE fault, as revealed by kinematic inversion studies of Global Navigation Satellite System (GNSS) data and added this locked region with a slip deficit rate in the model. We estimated the slip rate on the locked region only kinematically, but the quasi-dynamic equation of motion in each LSSE fault cell includes the stress term arising from the locked region. Based on this model, we synthesized the observed surface displacement rate data for the actual distribution of GNSS stations and executed EnKF estimations including the slip rate on the locked region. The slip rate on the locked region could be quickly retrieved. Even for the actual distribution of GNSS stations, we could successfully estimate frictional parameters and slip evolution on the LSSE fault. Thus, our twin numerical experiments showed the validity of our EnKF method, although we need further studies for actual GNSS data analyses.

Estimates of long-term probabilities for future great earthquakes in the Aleutians

1984 ◽  
Vol 11 (4) ◽  
pp. 295-298 ◽  
Author(s):  
Klaus H. Jacob
Keyword(s):  
Great Earthquakes

scholarly journals Acoustic response of submarine volcanoes in the Tofua Arc and northern Lau Basin to two great earthquakes

2013 ◽  
Vol 196 (3) ◽  
pp. 1657-1675 ◽  
Author(s):  
DelWayne R. Bohnenstiehl ◽  
Robert P. Dziak ◽  
Haru Matsumoto ◽  
James A. Conder
Keyword(s):  
Acoustic Response ◽  
Lau Basin ◽  
Great Earthquakes

Simulation of Tsunamis from Great Earthquakes on the Cascadia Subduction Zone

Science ◽  
1990 ◽  
Vol 250 (4985) ◽  
pp. 1248-1251 ◽  
Author(s):  
M. K.-F. Ng ◽  
P. H. Leblond ◽  
T. S. Murty
Keyword(s):  
Subduction Zone ◽  
Cascadia Subduction Zone ◽  
Great Earthquakes

Spatiotemporal characteristics of the energy radiation sources of the three great earthquakes near Sumatra Island in September 2007

2008 ◽  
Vol 53 (15) ◽  
pp. 2364-2370
Author(s):  
LiSheng Xu ◽  
HaiLin Du ◽  
HongXia Zhang ◽  
Yong Zhang ◽  
ChunLai Li ◽  
...  
Keyword(s):  
Energy Radiation ◽  
Spatiotemporal Characteristics ◽  
Great Earthquakes ◽  
Radiation Sources ◽  
Sumatra Island

Great Earthquakes

1937 ◽  
Vol 27 (3) ◽  
pp. 262-264
Author(s):  
Harry O. Wood
Keyword(s):  
Great Earthquakes
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