Registration of tsunamis in the open ocean

Dykhan, B. D.; Jaque, V. M.; Kulikov, E. A.; Lappo, S. S.; Mitrofanov, V. N.; Poplavsky, A. A.; Родионов, А. В.; Shishkin, A.A.; Soloviev, S. L.

doi:10.1080/15210608309379464

Cited by 11 publications

(6 citation statements)

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“…The same maxima, particularly the principal one with a period of 50 rain, were observed at this station during the tsunami of February 23, 1980 [Dykhan et al, 1983].…”

Section: Tsunami Oscillations (T(t) Near the Coast May Be Described Asupporting

confidence: 55%

Spectral analysis of tsunami waves: Separation of source and topography effects

Rabinovich¹

1997

J. Geophys. Res.

180

123

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Abstract. A new approach is proposed to separate the influence of source and topography in observed tsunami spectra and to reconstruct the initial source spectrum. The method assumes a linear tide gauge response to external forcing and is based on comparative analysis of tsunami and background spectra. Evaluation of the ratio of tsunami to background spectra gives functional characteristics that are invariant of station location and dependent only on the source parameters. Three events, the Urup tsunami of December 22, 1991 (northwest Pacific), the Hokkaido Southwest (Okushiri) tsunami of July 12, 1993 (Sea of Japan), and the Shikotan tsunami of October 4, 1994 (northwest Pacific), are used as examples of the proposed approach. The source spectra reconstructed from the analysis of different tide gauges were found to be in good agreement with each other and with the seismological, geodetic, and field survey data.

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“…The same maxima, particularly the principal one with a period of 50 rain, were observed at this station during the tsunami of February 23, 1980 [Dykhan et al, 1983].…”

Section: Tsunami Oscillations (T(t) Near the Coast May Be Described Asupporting

confidence: 55%

Spectral analysis of tsunami waves: Separation of source and topography effects

Rabinovich¹

1997

J. Geophys. Res.

180

123

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“…Bottom cable stations with Vibrotron sensors and coastal analog recorders were used initially. Improved sensors, recorders and cable lines made it possible to obtain one of the first records of tsunami waves in the open ocean on 23 February 1980 (Dykhan et al, 1983).…”

Section: Instrumentsmentioning

confidence: 99%

“…The first was a standard Vibrotron sensor PDV-10, a similar but improved version of that used for tsunami observations near Shikotan Island (Dykhan et al, 1983). The second was a quartz crystal transducer with a range of 0-3 MPa, hysteresis of 0.05%, and a typical accuracy under harsh environmental conditions of 0.25%.…”

Section: Instrumentsmentioning

confidence: 99%

Investigation of long waves in the tsunami frequency band on the southwestern shelf of Kamchatka

1991

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Two inexpensive cable bottom pressure stations were installed on the southwestern shelf of Kamchatka (Okhotsk Sea) in 1987 and two more in 1988 to provide longwave measurements in the tsunami frequency band, to investigate the generating mechanism of these waves, and to test the instrumentation. Microftuctuations of atmospheric pressure were recorded simultaneously. Two cable lines were torn off by ship anchors in March 1989 but others are still working in spite of highly dynamic activity on beaches and in hard ice regimes. Careful data analysis of two months of observations (September October, 1987) showed that: (1) the atmospheric spectra were very stable and monotonic in the period range 2-50 min and corresponded to a power law of o9 -2.3, (2) the direct generation of long waves by atmospheric pressure fluctuations was negligible, (3) there was high correlation between background longwave oscillations and sea state, (4) the structure of the offshore longwave field was in good agreement with theoretical estimates of standing waves for a linear slope.

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“…The first reliable deep ocean tsunami records were obtained on the shelf of Shikotan Island [14,15] and in the deep ocean near California [16]. An earthquake with a magnitude of М = 7.1 occurred near the Lesser Kuril Islands on February 23, 1980; it induced a small tsunami event recorded by tide gauges at Shikotan, Kunashir, Iturup, and Hokkaido islands (Fig.…”

Section: Introduction: Historical Overviewmentioning

confidence: 99%

Tsunami observations in the open ocean

Rabinovich

2014

Izv. Atmos. Ocean. Phys.

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Deep sea tsunami measurements play a major role in understanding the physics of tsunami wave generation and propagation, and in the creation of an effective tsunami warning system. The paper provides an overview of the history of tsunami recording in the open ocean from the beginning (about 50 years ago) to the present day. It describes modern tsunami monitoring systems, including the Deep ocean Assessment and Reporting of Tsunamis (DART), innovative Japanese bottom cable projects, and the NEPTUNE Canada geophysical bottom observatory. The specific peculiarities of seafloor longwave observations in the deep ocean are discussed and compared with those recorded in coastal regions. Tsunami detection in bottom presure observations is exemplified based on analysis of distant (22000 km) records of the 2004 Sumatra tsu nami in the northeastern Pacific.

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Registration of tsunamis in the open ocean

Cited by 11 publications

References 0 publications

Spectral analysis of tsunami waves: Separation of source and topography effects

Spectral analysis of tsunami waves: Separation of source and topography effects

Investigation of long waves in the tsunami frequency band on the southwestern shelf of Kamchatka

Tsunami observations in the open ocean

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