Field Investigation on the 2010 Chilean Earthquake Tsunami along the Comprehensive Coastal Region in Japan

Tsuji, Yosuke; Ohtoshi, Kunio; Nakano, Susumu; Nishimura, Yuichi; Fujima, Koji; Imamura, Fumihiko; Kakinuma, Taro; Nakamura, Yugo; Imai, Kentaro; Goto, Kazuhisa; Namegaya, Yuichi; Suzuki, Shingo; Shiroshita, Hideyuki; Matsuzaki, Yuriko

doi:10.2208/kaigan.66.1346

Cited by 8 publications

(8 citation statements)

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“…However, as most physical evidence had disappeared by June 2011, later surveys mainly relied on eyewitness accounts. In ports where the tsunami did not inundate above the wharfs, we measured tsunami heights based on eyewitness accounts and classified them as tsunami heights in ports, as proposed by TSUJI et al (2010).…”

Section: Field Surveys Of Tsunami Heights From the 2011 Tohoku Earthqmentioning

confidence: 99%

“…IMAI et al (2010) reported tsunami heights from the 2010 Chile earthquake along the coasts of the Kanto and Tokai districts measured from field surveys or tide gauges. TSUJI et al (2010) reported the 2010 tsunami heights along the Sanriku coast measured from field surveys or tide gauges. The tsunami heights were above sea level at the time of maximum tsunami and were classified as inundation heights, runup heights, and tsunami heights in ports.…”

Section: And 2010 Chile Earthquakesmentioning

confidence: 99%

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Tsunami Heights along the Pacific Coast of Northern Honshu Recorded from the 2011 Tohoku and Previous Great Earthquakes

Tsuji

Satake

Ishibe

et al. 2014

Pure Appl. Geophys.

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Abstract-The 2011 Tohoku earthquake generated a huge, destructive tsunami with coastal heights of up to 40 m recorded along northern Honshu. The Sanriku coast experienced similar tsunamis and damage from the 1896 and 1933 Sanriku earthquakes, whereas the only damaging tsunamis on both the Ibaraki and Chiba coasts in the previous century were from the 1960 and 2010 Chile earthquakes. We summarized 12 field surveys in which the height of the 2011 tsunami was recorded at 296 points, along with descriptions of the survey method, reliability, and accuracy. We then compared them with the above-mentioned tsunamis at locations for which specific measurements were given in previous reports. On the Sanriku coast, the 2011 tsunami heights are positively correlated with the previous Sanriku tsunamis, indicating that local variations resulting from the irregular coastline were more dominant factors than the earthquake location, type, or magnitude for near-field tsunamis. The correlations with the Chilean tsunami heights are less significant due to the differences between the local and trans-Pacific tsunamis. On the Ibaraki and Chiba coasts, the 2011 Tohoku and the two Chilean tsunami heights are positively correlated, showing the general decrease toward the south with small local variations such as large heights near peninsulas.

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Section: Field Surveys Of Tsunami Heights From the 2011 Tohoku Earthqmentioning

confidence: 99%

Section: And 2010 Chile Earthquakesmentioning

confidence: 99%

Tsunami Heights along the Pacific Coast of Northern Honshu Recorded from the 2011 Tohoku and Previous Great Earthquakes

Tsuji

Satake

Ishibe

et al. 2014

Pure Appl. Geophys.

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“…2). The tsunami reached the Japanese coasts in approximately 23 h with heights up to 2 m TSUJI et al, 2010). There were no casualties in Japan, but damage to floating materials such as aquafarming rafts was caused by water currents associated with the tsunami.…”

Section: Trans-pacific Tsunamismentioning

confidence: 99%

Slip Distribution and Seismic Moment of the 2010 and 1960 Chilean Earthquakes Inferred from Tsunami Waveforms and Coastal Geodetic Data

Fujii

Satake

2012

Pure Appl. Geophys.

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Abstract-The slip distribution and seismic moment of the 2010 and 1960 Chilean earthquakes were estimated from tsunami and coastal geodetic data. These two earthquakes generated transoceanic tsunamis, and the waveforms were recorded around the Pacific Ocean. In addition, coseismic coastal uplift and subsidence were measured around the source areas. For the 27 February 2010 Maule earthquake, inversion of the tsunami waveforms recorded at nearby coastal tide gauge and Deep Ocean Assessment and Reporting of Tsunamis (DART) stations combined with coastal geodetic data suggest two asperities: a northern one beneath the coast of Constitucion and a southern one around the Arauco Peninsula. The total fault length is approximately 400 km with seismic moment of 1.7 9 10 22 Nm (Mw 8.8). The offshore DART tsunami waveforms require fault slips beneath the coasts, but the exact locations are better estimated by coastal geodetic data. The 22 May 1960 earthquake produced very large, *30 m, slip off Valdivia. Joint inversion of tsunami waveforms, at tide gauge stations in South America, with coastal geodetic and leveling data shows total fault length of *800 km and seismic moment of 7.2 9 10 22 Nm (Mw 9.2). The seismic moment estimated from tsunami or joint inversion is similar to previous estimates from geodetic data, but much smaller than the results from seismic data analysis.

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“…On 27 February 2010, the M w 8.8 Maule earthquake occurred in the coastal region of central Chile (06:34:14 UTC, 35.909°S, 72.733°W, 35 km depth, U.S. Geological Survey, http://earthquake.usgs.gov/earthquakes/eqinthenews/2010/us2010tfan/) and generated a large tsunami, which traveled across the Pacific Ocean and reached the Japanese coasts in approximately 23 h after the earthquake with inundation heights up to 2 m [ Imai et al , ; Tsuji et al , ]. The Japan Meteorological Agency issued a tsunami warning about 3 h before the expected arrival, but the observed tsunami reached the coast after a delay of 30 min or more.…”

Section: Introductionmentioning

confidence: 99%

Source estimate and tsunami forecast from far‐field deep‐ocean tsunami waveforms—The 27 February 2010 M_w 8.8 Maule earthquake

Yoshimoto

Watada

Fujii

et al. 2016

Geophysical Research Letters

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We inverted the 2010 Maule earthquake tsunami waveforms recorded at DART (Deep‐ocean Assessment and Reporting Tsunamis) stations in the Pacific Ocean by taking into account the effects of the seawater compressibility, elasticity of the solid Earth, and gravitational potential change. These effects slow down the tsunami speed and consequently move the slip offshore or updip direction, consistent with the slip distribution obtained by a joint inversion of DART, tide gauge, GPS, and coastal geodetic data. Separate inversions of only near‐field DART data and only far‐field DART data produce similar slip distributions. The former demonstrates that accurate tsunami arrival times and waveforms of trans‐Pacific tsunamis can be forecast in real time. The latter indicates that if the tsunami source area is as large as the 2010 Maule earthquake, the tsunami source can be accurately estimated from the far‐field deep‐ocean tsunami records without near‐field data.

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Field Investigation on the 2010 Chilean Earthquake Tsunami along the Comprehensive Coastal Region in Japan

Cited by 8 publications

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Tsunami Heights along the Pacific Coast of Northern Honshu Recorded from the 2011 Tohoku and Previous Great Earthquakes

Tsunami Heights along the Pacific Coast of Northern Honshu Recorded from the 2011 Tohoku and Previous Great Earthquakes

Slip Distribution and Seismic Moment of the 2010 and 1960 Chilean Earthquakes Inferred from Tsunami Waveforms and Coastal Geodetic Data

Source estimate and tsunami forecast from far‐field deep‐ocean tsunami waveforms—The 27 February 2010 M_w 8.8 Maule earthquake

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Field Investigation on the 2010 Chilean Earthquake Tsunami along the Comprehensive Coastal Region in Japan

Cited by 8 publications

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Tsunami Heights along the Pacific Coast of Northern Honshu Recorded from the 2011 Tohoku and Previous Great Earthquakes

Tsunami Heights along the Pacific Coast of Northern Honshu Recorded from the 2011 Tohoku and Previous Great Earthquakes

Slip Distribution and Seismic Moment of the 2010 and 1960 Chilean Earthquakes Inferred from Tsunami Waveforms and Coastal Geodetic Data

Source estimate and tsunami forecast from far‐field deep‐ocean tsunami waveforms—The 27 February 2010 Mw 8.8 Maule earthquake

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Source estimate and tsunami forecast from far‐field deep‐ocean tsunami waveforms—The 27 February 2010 M_w 8.8 Maule earthquake