Rupture Process of the 1969 and 1975 Kurile Earthquakes Estimated from Tsunami Waveform Analyses

Ioki, Kei; Tanioka, Yuichiro

doi:10.1007/s00024-016-1402-0

Cited by 7 publications

(7 citation statements)

References 20 publications

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“…This could suggest that the depth of slip along this section of the trench is possibly controlled by the slip history of the earthquakes rupturing into this zone from both the north (e.g., 1730) and south (e.g., 1751). Similar fault behaviors of deep ruptures followed by shallower ones along the same fault sections have also been reported in other subduction zones, such as in that of Kurile for the 1969-1975 earthquake sequence [Ioki and Tanioka, 2016] and in that of Mentawai for the 2007-2010 earthquake sequence [Lay, 2015].…”

Section: Journal Of Geophysicalsupporting

confidence: 81%

Source of the 1730 Chilean earthquake from historical records: Implications for the future tsunami hazard on the coast of Metropolitan Chile

2017

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Historical records of an earthquake that occurred in 1730 affecting Metropolitan Chile provide essential clues on the source characteristics for the future earthquakes in the region. The earthquake and tsunami of 1730 have been recognized as the largest to occur in Metropolitan Chile since the beginning of written history. The earthquake destroyed buildings along >1000 km of the coast and produced a large tsunami that caused damage as far as Japan. Here its source characteristics are inferred by comparing local tsunami inundations computed from hypothetical earthquakes with varying magnitude and depth, with those inferred from historical observations. It is found that a 600–800 km long rupture involving average slip amounts of 10–14 m (Mw 9.1–9.3) best explains the observed tsunami heights and inundations. This large earthquake magnitude is supported by the 1730 tsunami heights inferred in Japan. The inundation results combined with local uplift reports suggest a southward increase of the slip depth along the rupture zone of the 1730 earthquake. While shallow slip on the area to the north of the 2010 earthquake rupture zone is required to explain the reported inundation, only deeper slip at this area can explain the coastal uplift reports. Since the later earthquakes of the region involved little or no slip at shallow depths, the near‐future earthquakes on Metropolitan Chile could release the shallow slip accumulated since 1730 and thus lead to strong tsunami excitation. Moderate shaking from a shallow earthquake could delay tsunami evacuation for the most populated coastal region of Chile.

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Section: Journal Of Geophysicalsupporting

confidence: 81%

Source of the 1730 Chilean earthquake from historical records: Implications for the future tsunami hazard on the coast of Metropolitan Chile

2017

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“…These events considered in [7,8], also parameters of those source models reviewed in [9,10,11]. The exact match of observed and simulated tsunami heights is not necessary, as shown in [12] only height ratio estimates are enough for the point where tsunami height is known.…”

Section: Extension Of Recurrence Function To the Adjacent Areas Of Thmentioning

confidence: 99%

“…To conduct detailed simulations in bays of Shikotan Island and refine calculation in Yuzhno-Kurilskaya Bay and Kitoviy Bay of Iturup Island the 15-arcsecond grid has been interpolated for coupling with digitized bathymetries of bays to 2-arcsecond resolution. The seismological finite-fault data of tsunamigenic earthquakes were taken from USGS and articles devoted to old events of 1958-1994 [15,9,10,11,16]. After carrying out calculations of the propagation of all significant tsunamis, the numerical waveforms in each point along the isobath of about 8 m were processed with a special transformation allowing one to estimate the wave height on the shore with assumption the one-dimensional nonlinear rolling.…”

Section: Characteristics Of Numerical Modelmentioning

confidence: 99%

New map of tsunami-hazard for the south Kuril Islands

2019

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The tsunami-zoning map (possible tsunami heights of a frequency of 1 event within 50 and 100 years) for the coast of the South Kuril Islands have been updated (former map have been developed in 2006). The update is based on the development of the tsunami-activity model, mainly due to the increase of the number of basic coastal locations (from 18 to 62) for which the parameters of the recurrence function were estimated, as well as on the modernization of the numerical model. Serious progress in simulations was achieved in setting the initial conditions, using the seismic tsunami source model. Field surveys on the coast to search for traces of historical and paleotsunami, as well as qualitative documentation of the Tohoku tsunami manifestations allowed to clarify the model of tsunami-activity in Southern Kuril Islands. The sufficiently large amount of data in this case (which is generally untypical for the tsunami) allowed authors, to apply the statistical approach for evaluation of the tsunami hazard distribution along the coast. Estimates of tsunami heights were spread from the basic coastal locations to adjacent parts of the coast using detailed simulation of all significant tsunamis and calculating wave heights at the shoreline. The detailed maps of tsunami-hazard at scale 1:100,000 have been made for the settlements of Yuzhno-Kurilsk, Kurilsk, Malokurilskoe, and Krabozavodskoe.

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“…Understanding the behavior of the plate interface in this region is necessary for tsunami hazard analysis in this region. Ioki and Tanioka (2016) estimate the slip distribution for these two earthquakes using tsunami waveforms observed at tide gauges. They conclude that the 1975 earthquake ruptured the shallowest part of the plate interface in an area where the 1969 earthquake did not rupture.…”

Section: Case Studiesmentioning

confidence: 99%

Introduction to “Global Tsunami Science: Past and Future, Volume I”

Geist

Fritz

Rabinovich

et al. 2016

Pure Appl. Geophys.

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Twenty-five papers on the study of tsunamis are included in Volume I of the PAGEOPH topical issue ''Global Tsunami Science: Past and Future''. Six papers examine various aspects of tsunami probability and uncertainty analysis related to hazard assessment. Three papers relate to deterministic hazard and risk assessment. Five more papers present new methods for tsunami warning and detection. Six papers describe new methods for modeling tsunami hydrodynamics. Two papers investigate tsunamis generated by non-seismic sources: landslides and meteorological disturbances. The final three papers describe important case studies of recent and historical events. Collectively, this volume highlights contemporary trends in global tsunami research, both fundamental and applied toward hazard assessment and mitigation.

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Rupture Process of the 1969 and 1975 Kurile Earthquakes Estimated from Tsunami Waveform Analyses

Cited by 7 publications

References 20 publications

Source of the 1730 Chilean earthquake from historical records: Implications for the future tsunami hazard on the coast of Metropolitan Chile

Source of the 1730 Chilean earthquake from historical records: Implications for the future tsunami hazard on the coast of Metropolitan Chile

New map of tsunami-hazard for the south Kuril Islands

Introduction to “Global Tsunami Science: Past and Future, Volume I”

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