scholarly journals Source and progression of a submarine landslide and tsunami: The 1964 Great Alaska earthquake at Valdez

2014 ◽  
Vol 119 (11) ◽  
pp. 8502-8516 ◽  
Author(s):  
Tom Parsons ◽  
Eric L. Geist ◽  
Holly F. Ryan ◽  
Homa J. Lee ◽  
Peter J. Haeussler ◽  
...  
Keyword(s):  
Submarine Landslide ◽  
Alaska Earthquake

FUNDAMENTAL ANALYSIS ON TSUNAMI CHARACTERISTICS GENERATED BY SUBMARINE LANDSLIDE

2019 ◽  
Vol 75 (2) ◽  
pp. I_325-I_330
Author(s):  
Masatoshi YUHI ◽  
Akinori YAMAMOTO ◽  
Masanobu KOBA ◽  
Takuya UENO
Keyword(s):  
Submarine Landslide ◽  
Fundamental Analysis

A METHOD TO EVALUATE POSSIBLE FUTURE TSUNAMI CAUSED BY SUBMARINE LANDSLIDE.

2020 ◽  
Vol 76 (2) ◽  
pp. I_349-I_354
Author(s):  
Toshimichi KANETO ◽  
Kazuya YAMAMOTO ◽  
Masanobu KOBA ◽  
Tatsuto KIMURA ◽  
Ayumi NISHI ◽  
...  
Keyword(s):  
Submarine Landslide

AFTERSHOCK FORECASTS FOLLOWING THE M7.0 ANCHORAGE, ALASKA EARTHQUAKE

2019 ◽  
Author(s):  
Sara K. McBride ◽  
◽  
Jeanne Hardebeck ◽  
Andrew Michael ◽  
Morgan T. Page ◽  
...  
Keyword(s):  
Alaska Earthquake

Supplemental Material: Geophysical analysis of the 30 July 1972 Sitka, Alaska, earthquake sequence

2020 ◽  
Author(s):  
Juan A. Ochoa Chavez ◽  
Diane Doser
Keyword(s):  
Earthquake Sequence ◽  
Double Difference ◽  
Alaska Earthquake

Supplemental Material 1 contains relocated aftershocks of 30 July 1972 sequence. Supplemental Material 2 contains relocation parameters used in double-difference algorithm (HYPODD).<br>

scholarly journals Co-Seismic Ionospheric Disturbance with Alaska Strike-Slip Mw7.9 Earthquake on 23 January 2018 Monitored by GPS

Atmosphere ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 83
Author(s):  
Yongming Zhang ◽  
Xin Liu ◽  
Jinyun Guo ◽  
Kunpeng Shi ◽  
Maosheng Zhou ◽  
...  
Keyword(s):  
Fault Location ◽  
Ionospheric Disturbance ◽  
Near Field ◽  
Singular Spectrum Analysis ◽  
Maximum Amplitude ◽  
Strike Slip ◽  
Ionospheric Disturbances ◽  
Total Electron ◽  
Total Electron Contents ◽  
Alaska Earthquake

The Mw7.9 Alaska earthquake at 09:31:40 UTC on 23 January 2018 occurred as the result of strike slip faulting within the shallow lithosphere of the Pacific plate. Global positioning system (GPS) data were used to calculate the slant total electron contents above the epicenter. The singular spectrum analysis (SSA) method was used to extract detailed ionospheric disturbance information, and to monitor the co-seismic ionospheric disturbances (CIDs) of the Alaska earthquake. The results show that the near-field CIDs were detected 8–12 min after the main shock, and the typical compression-rarefaction wave (N-shaped wave) appeared. The ionospheric disturbances propagate to the southwest at a horizontal velocity of 2.61 km/s within 500 km from the epicenter. The maximum amplitude of CIDs appears about 0.16 TECU (1TECU = 1016 el m−2) near the epicenter, and gradually decreases with the location of sub-ionospheric points (SIPs) far away from the epicenter. The attenuation rate of amplitude slows down as the distance between the SIPs and the epicenter increases. The direction of the CIDs caused by strike-slip faults may be affected by the horizontal direction of fault slip. The propagation characteristics of the ionospheric disturbance in the Alaska earthquake may be related to the complex conditions of focal mechanisms and fault location.

scholarly journals Consecutive ruptures on a complex conjugate fault system during the 2018 Gulf of Alaska earthquake

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shinji Yamashita ◽  
Yuji Yagi ◽  
Ryo Okuwaki ◽  
Kousuke Shimizu ◽  
Ryoichiro Agata ◽  
...  
Keyword(s):  
Gulf Of Alaska ◽  
Source Model ◽  
Fault System ◽  
Complex Conjugate ◽  
Inversion Method ◽  
Fault Geometry ◽  
Conjugate System ◽  
Finite Fault Inversion ◽  
Finite Fault ◽  
Alaska Earthquake

AbstractWe developed a flexible finite-fault inversion method for teleseismic P waveforms to obtain a detailed rupture process of a complex multiple-fault earthquake. We estimate the distribution of potency-rate density tensors on an assumed model plane to clarify rupture evolution processes, including variations of fault geometry. We applied our method to the 23 January 2018 Gulf of Alaska earthquake by representing slip on a projected horizontal model plane at a depth of 33.6 km to fit the distribution of aftershocks occurring within one week of the mainshock. The obtained source model, which successfully explained the complex teleseismic P waveforms, shows that the 2018 earthquake ruptured a conjugate system of N-S and E-W faults. The spatiotemporal rupture evolution indicates irregular rupture behavior involving a multiple-shock sequence, which is likely associated with discontinuities in the fault geometry that originated from E-W sea-floor fracture zones and N-S plate-bending faults.

Line length balancing to evaluate multi-phase submarine landslide development: an example from the Storegga Slide, Norway

2019 ◽  
Vol 500 (1) ◽  
pp. 531-549 ◽  
Author(s):  
Suzanne Bull ◽  
Joseph A. Cartwright
Keyword(s):  
Seismic Data ◽  
Large Scale ◽  
Line Length ◽  
Proximal Region ◽  
Submarine Landslide ◽  
Landslide Development ◽  
Multi Phase ◽  
Storegga Slide ◽  
2D And 3D ◽  
3D Seismic Data

AbstractThis study shows how simple structural restoration of a discrete submarine landslide lobe can be applied to large-scale, multi-phase examples to identify different phases of slide-lobe development and evaluate their mode of emplacement. We present the most detailed analysis performed to date on a zone of intense contractional deformation, historically referred to as the compression zone, from the giant, multi-phase Storegga Slide, offshore Norway. 2D and 3D seismic data and bathymetry data show that the zone of large-scale (>650 m thick) contractional deformation can be genetically linked updip with a zone of intense depletion across a distance of 135 km. Quantification of depletion and accumulation along a representative dip-section reveals that significant depletion in the proximal region is not accommodated in the relatively mild amount (c. 5%) of downdip shortening. Dip-section restoration indicates a later, separate stage of deformation may have involved removal of a significant volume of material as part of the final stages of the Storegga Slide, as opposed to the minor volumes reported in previous studies.

A submarine landslide complex affecting the Jan Mayen Ridge, Norwegian–Greenland Sea: slide-scar morphology and processes of sediment evacuation

2013 ◽  
Vol 34 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Jan S. Laberg ◽  
Kiichiro Kawamura ◽  
Hilde Amundsen ◽  
Nicole Baeten ◽  
Matthias Forwick ◽  
...  
Keyword(s):  
Submarine Landslide ◽  
Greenland Sea ◽  
Slide Scar

scholarly journals Submarine landslide as the source for the October 11, 1918 Mona Passage tsunami: Observations and modeling

2008 ◽  
Vol 254 (1-2) ◽  
pp. 35-46 ◽  
Author(s):  
A.M. López-Venegas ◽  
U.S. ten Brink ◽  
E.L. Geist
Keyword(s):  
Submarine Landslide ◽  
Tsunami Observations
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