Towards real‐time tsunami amplitude prediction

Sobolev, Stephan; Babeyko, Andrey; Wang, Rongjiang; Galas, R.; Rothacher, M.; Lauterjung, J.; Sein, Dmitry; Schröter, Jens; Subarya, C.

doi:10.1029/2006eo370003

Cited by 13 publications

(15 citation statements)

References 5 publications

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“…The real-time deformation monitoring technique is based on near-field Global Position System (GPS) to study co-seismic displacements. Using coastal GPS stations data near the epicenter, the new method estimates the energy transferred by undersea earthquake to the ocean to generate tsunami (Sobolev et al, 2006). Recent analysis showed that by using GPS displacements, it is possible to calculate how far the stations moved because of the quake and that in turn helped in deriving an earthquake's true size, called moment magnitude.…”

Section: The Indian Tsunami Early Warning Centrementioning

confidence: 99%

Near Real-Time Determination of Earthquake Source Parameters for Tsunami Early Warning From Geodetic Observations

Manneela¹,

Kumar²,

Nayak³

2016

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Commission VIII, WG VIII/1 KEY WORDS: earthquake, tsunami, ITEWS, GPS, inversion, moment magnitude, tsunami warning, numerical modelling ABSTRACT:Exemplifying the tsunami source immediately after an earthquake is the most critical component of tsunami early warning, as not every earthquake generates a tsunami. After a major under sea earthquake, it is very important to determine whether or not it has actually triggered the deadly wave. The near real-time observations from near field networks such as strong motion and Global Positioning System (GPS) allows rapid determination of fault geometry. Here we present a complete processing chain of Indian Tsunami Early Warning System (ITEWS), starting from acquisition of geodetic raw data, processing, inversion and simulating the situation as it would be at warning center during any major earthquake. We determine the earthquake moment magnitude and generate the centroid moment tensor solution using a novel approach which are the key elements for tsunami early warning. Though the well established seismic monitoring network, numerical modeling and dissemination system are currently capable to provide tsunami warnings to most of the countries in and around the Indian Ocean, the study highlights the critical role of geodetic observations in determination of tsunami source for high-quality forecasting.

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Section: The Indian Tsunami Early Warning Centrementioning

confidence: 99%

Near Real-Time Determination of Earthquake Source Parameters for Tsunami Early Warning From Geodetic Observations

Manneela¹,

Kumar²,

Nayak³

2016

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…Recent progress in high-precision real-time GPS processing makes GPS arrays a valuable component of near-field TEWS (Blewitt et al, 2006(Blewitt et al, , 2009Ohta et al, 2012;Sobolev et al, 2006Sobolev et al, , 2007. GPS receivers placed close to the epicenter minimize response time while not suffering from clipping as broadband seismometers do, or tilting artifacts as accelerometers after double integration for displacement.…”

Section: Gps In Tsunami Early Warningmentioning

confidence: 99%

“…They directly measure surface deformation, which is crucial for tsunami source inversion. Started after the event of Sumatra 2004, the concept of the "GPS shield" was proposed (Sobolev et al, 2006(Sobolev et al, , 2007, where we suggested incorporating GPS-based tsunami early warning in all tsunami-prone areas worldwide, including Japan, and which is now becoming an operative part of the German Indonesian Tsunami Early Warning System GITEWS Behrens et al, 2010;Falck et al, 2010).…”

Section: Gps In Tsunami Early Warningmentioning

confidence: 99%

Instant tsunami early warning based on real-time GPS – Tohoku 2011 case study

Hoechner

Babeyko

et al. 2013

Nat. Hazards Earth Syst. Sci.

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Abstract. Taking the 2011 Tohoku earthquake as an example, we demonstrate the ability of real-time GPS to provide qualified tsunami early warning within minutes. While in earlier studies we demonstrated the power of the so-called GPS shield concept based on synthetic data, we here present a complete processing chain starting from actual GPS raw data and fully simulate the situation as it would be in a warning center. The procedure includes processing of GPS observations with predicted high precision orbits, inversion for slip and computation of the tsunami propagation and coastal warning levels. We show that in case of the Tohoku earthquake, it would be feasible to provide accurate tsunami warning as soon as 3 min after the beginning of the earthquake.

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“…Continuous near real-time GPS stations provide averaged surface displacements in two minutes intervals (Falck et al, 2010). Together with seismic data, GPS-displacements allow for the direct inversion to get more detailed source parameters in a few minutes after the earthquake (Sobolev et al, 2006(Sobolev et al, , 2007Hoechner et al, 2008). Later on, wave propagation is tracked by ocean-based sensors.…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, in the course of the GITEWS project, our group proposed to use near real-time GPS-arrays to get very fast information about finite fault parameters (Sobolev et al, 2006(Sobolev et al, , 2007 and presented the concept of "GPS-Shield" for Indonesia. This concept could be extended world-wide, to many other tsunamigenic active margins where the land is located above or close to seismogenic zones.…”

Section: Introductionmentioning

confidence: 99%

Source modeling and inversion with near real-time GPS: a GITEWS perspective for Indonesia

Babeyko

Hoechner

Sobolev

2010

Nat. Hazards Earth Syst. Sci.

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Abstract. We present the GITEWS approach to source modeling for the tsunami early warning in Indonesia. Near-field tsunami implies special requirements to both warning time and details of source characterization. To meet these requirements, we employ geophysical and geological information to predefine a maximum number of rupture parameters. We discretize the tsunamigenic Sunda plate interface into an ordered grid of patches (150 × 25) and employ the concept of Green's functions for forward and inverse rupture modeling. Rupture Generator, a forward modeling tool, additionally employs different scaling laws and slip shape functions to construct physically reasonable source models using basic seismic information only (magnitude and epicenter location). GITEWS runs a library of semi-and fully-synthetic scenarios to be extensively employed by system testing as well as by warning center personnel teaching and training. Near realtime GPS observations are a very valuable complement to the local tsunami warning system. Their inversion provides quick (within a few minutes on an event) estimation of the earthquake magnitude, rupture position and, in case of sufficient station coverage, details of slip distribution.

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Towards real‐time tsunami amplitude prediction

Cited by 13 publications

References 5 publications

Near Real-Time Determination of Earthquake Source Parameters for Tsunami Early Warning From Geodetic Observations

Near Real-Time Determination of Earthquake Source Parameters for Tsunami Early Warning From Geodetic Observations

Instant tsunami early warning based on real-time GPS – Tohoku 2011 case study

Source modeling and inversion with near real-time GPS: a GITEWS perspective for Indonesia

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