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  • 1
    Online Resource
    Online Resource
    GPS for real-time earthquake source determination and tsunami warning systems
    Springer Science and Business Media LLC ; 2009
    In:  Journal of Geodesy Vol. 83, No. 3-4 ( 2009-3), p. 335-343
    Details
    In: Journal of Geodesy, Springer Science and Business Media LLC, Vol. 83, No. 3-4 ( 2009-3), p. 335-343
    Type of Medium: Online Resource
    ISSN: 0949-7714 , 1432-1394
    URL: Article
    DOI: 10.1007/s00190-008-0262-5
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2009
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    SSG: 14
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  • 2
    Online Resource
    Online Resource
    Rapid determination of earthquake magnitude using GPS for tsunami warning systems
    American Geophysical Union (AGU) ; 2006
    In:  Geophysical Research Letters Vol. 33, No. 11 ( 2006-06)
    Details
    In: Geophysical Research Letters, American Geophysical Union (AGU), Vol. 33, No. 11 ( 2006-06)
    Abstract: The 26 December 2004 Sumatra earthquake (M w 9.2–9.3) generated the most deadly tsunami in history. Yet within the first hour, the true danger of a major oceanwide tsunami was not indicated by seismic magnitude estimates, which were far too low (M w 8.0–8.5). This problem relates to the inherent saturation of early seismic‐wave methods. Here we show that the earthquake's true size and tsunami potential can be determined using Global Positioning System (GPS) data up to only 15 min after earthquake initiation, by tracking the mean displacement of the Earth's surface associated with the arrival of seismic waves. Within minutes, displacements of 〉 10 mm are detectable as far away as India, consistent with results using weeks of data after the event. These displacements imply M w 9.0 ± 0.1, indicating a high tsunami potential. This suggests existing GPS infrastructure could be developed into an effective component of tsunami warning systems.
    Type of Medium: Online Resource
    ISSN: 0094-8276 , 1944-8007
    URL: Article
    DOI: 10.1029/2006GL026145
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2006
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    detail.hit.zdb_id: 7403-2
    SSG: 16,13
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  • 3
    Online Resource
    Online Resource
    The 1942 Southwest Indian Ocean Ridge Earthquake: Largest ever recorded on an oceanic transform
    American Geophysical Union (AGU) ; 1987
    In:  Geophysical Research Letters Vol. 14, No. 2 ( 1987-02), p. 147-150
    Details
    In: Geophysical Research Letters, American Geophysical Union (AGU), Vol. 14, No. 2 ( 1987-02), p. 147-150
    Type of Medium: Online Resource
    ISSN: 0094-8276
    URL: Article
    DOI: 10.1029/GL014i002p00147
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1987
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    detail.hit.zdb_id: 7403-2
    SSG: 16,13
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  • 4
    Online Resource
    Online Resource
    Speed and size of the Sumatra earthquake
    Springer Science and Business Media LLC ; 2005
    In:  Nature Vol. 434, No. 7033 ( 2005-3), p. 581-582
    Details
    In: Nature, Springer Science and Business Media LLC, Vol. 434, No. 7033 ( 2005-3), p. 581-582
    Type of Medium: Online Resource
    ISSN: 0028-0836 , 1476-4687
    URL: Article
    DOI: 10.1038/434581a
    RVK:
    TA 1000
    RVK:
    UA 1000
    RVK:
    WA 15000
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2005
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    SSG: 11
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  • 5
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    Ultralong Period Seismic Study of the December 2004 Indian Ocean Earthquake and Implications for Regional Tectonics and the Subduction Process
    Seismological Society of America (SSA) ; 2007
    In:  Bulletin of the Seismological Society of America Vol. 97, No. 1A ( 2007-01-01), p. S279-S295
    Details
    In: Bulletin of the Seismological Society of America, Seismological Society of America (SSA), Vol. 97, No. 1A ( 2007-01-01), p. S279-S295
    Abstract: Analysis of the earth’s longest period normal modes shows that the December 2004 Sumatra–Andaman earthquake was much larger (Mw 9.3) than initially inferred from surface-wave data and involved slip on a much longer fault than initially inferred from body-wave data. The seismic moment and relative excitation of the normal modes indicate that the entire aftershock zone ruptured, consistent with the large tsunami amplitudes in Thailand, Sri Lanka, and India. An apparent increase in seismic moment with period results from interference between parts of the fault. The earthquake resulted from subduction of the Indian plate beneath the Burma microplate, a sliver plate between the Indian and Sunda plates. Hence, the rate and direction of convergence depends on the motion of the Burma plate, which is not well known. Convergence would be highly oblique if the rate of motion between Burma and Sunda is that inferred from spreading in the Andaman Sea, and less if a slower rate is inferred from the Sagaing fault. The December earthquake was much larger than expected from a previously proposed relation, based on the idea of seismic coupling, in which such earthquakes occur only when young lithosphere subducts rapidly. Moreover, a global reanalysis finds little support for this correlation. Hence, we suspect that much of the apparent differences between subduction zones, such as some trench segments but not others being prone to Mw & gt;8.5 events and hence oceanwide tsunamis, may reflect the short earthquake history sampled. This possibility is supported by the variability in rupture mode at individual trench segments.
    Type of Medium: Online Resource
    ISSN: 1943-3573 , 0037-1106
    URL: Article
    DOI: 10.1785/0120050617
    Language: English
    Publisher: Seismological Society of America (SSA)
    Publication Date: 2007
    detail.hit.zdb_id: 2065447-9
    SSG: 16,13
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  • 6
    Online Resource
    Online Resource
    The 2004 Sumatra earthquake and Indian Ocean tsunami: What happened and why?
    Springer Science and Business Media LLC ; 2005
    In:  Visual Geosciences Vol. 10, No. 1 ( 2005-1), p. 21-26
    Details
    In: Visual Geosciences, Springer Science and Business Media LLC, Vol. 10, No. 1 ( 2005-1), p. 21-26
    Type of Medium: Online Resource
    ISSN: 1610-2924
    URL: Article
    DOI: 10.1007/s10069-005-0025-x
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2005
    detail.hit.zdb_id: 1480924-2
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  • 7
    Online Resource
    Online Resource
    Observations of ultra-long period normal modes from the 2004 Sumatra–Andaman earthquake
    Elsevier BV ; 2009
    In:  Physics of the Earth and Planetary Interiors Vol. 175, No. 1-2 ( 2009-6), p. 53-62
    Details
    In: Physics of the Earth and Planetary Interiors, Elsevier BV, Vol. 175, No. 1-2 ( 2009-6), p. 53-62
    Type of Medium: Online Resource
    ISSN: 0031-9201
    URL: Article
    DOI: 10.1016/j.pepi.2009.03.002
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2009
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    detail.hit.zdb_id: 1500666-9
    SSG: 16,13
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  • 8
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    Online Resource
    The size of the 2011 Tohoku earthquake need not have been a surprise
    American Geophysical Union (AGU) ; 2011
    In:  Eos, Transactions American Geophysical Union Vol. 92, No. 27 ( 2011-07-05), p. 227-228
    Details
    In: Eos, Transactions American Geophysical Union, American Geophysical Union (AGU), Vol. 92, No. 27 ( 2011-07-05), p. 227-228
    Abstract: The devastating 11 March 2011 magnitude 9.1 earthquake along the Tohoku coast of northeastern Japan reminded seismologists again of the adage, “It ain't what you don't know that gets you into trouble—it's what you know for sure that just ain't so.” Many seismologists—and hence disaster planners—thought that such huge earthquakes could not occur on this subduction zone [ Chang , 2011; Geller , 2011]. Great earthquakes—magnitude 8—were expected and planned for. However, a giant magnitude 9 earthquake, which would release 30 times more energy, was not considered.
    Type of Medium: Online Resource
    ISSN: 0096-3941 , 2324-9250
    URL: Article
    DOI: 10.1029/2011EO270005
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2011
    detail.hit.zdb_id: 24845-9
    detail.hit.zdb_id: 2118760-5
    detail.hit.zdb_id: 240154-X
    SSG: 16,13
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  • 9
    Online Resource
    Online Resource
    Seismicity and tectonics of the Ninetyeast Ridge Area: Evidence for internal deformation of the Indian Plate
    American Geophysical Union (AGU) ; 1978
    In:  Journal of Geophysical Research: Solid Earth Vol. 83, No. B5 ( 1978-05-10), p. 2233-2245
    Details
    In: Journal of Geophysical Research: Solid Earth, American Geophysical Union (AGU), Vol. 83, No. B5 ( 1978-05-10), p. 2233-2245
    Abstract: The Ninetyeast Ridge, far from being ‘aseismic’, has historically been a region of substantial seismicity. Since 1913, 4 magnitude 7 or greater earthquakes (including one with M s = 7.7) and 10 magnitude 6 events have occurred in this general area. We have determined the mechanisms of several of these earthquakes, which suggest that the Ninetyeast Ridge area is presently a complex zone of deformation within the Indian plate. The northern portion (3°N–10°S) of the ridge is the active seismic zone, where both vertical and strike slip motion occur, while further south the ridge is far less seismic. This transition roughly coincides with a change in the ridge's morphology from irregular en échelon blocks to a smooth flat‐topped high. The strike slip motion is left lateral, which is consistent with the Indian (west) side encountering resistance due to the collision with Asia while the Australian (east) side is subducting smoothly at the Sumatra trench. South of about 9°S the style of deformation differs on the two sides of the ridge. To the east, normal faulting occurs, which may be related to the formation of grabenlike structures. To the west the topography can be interpreted as the result of NW‐SE compression which takes place largely aseismically but is observed for one large earthquake. This signficant intraplate deformation may explain the difficulties that occur in attempts to close the India‐Africa‐Antarctica triple junction using a rigid Indian plate.
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/JB083iB05p02233
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1978
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    detail.hit.zdb_id: 3094104-0
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    detail.hit.zdb_id: 2016813-5
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    detail.hit.zdb_id: 2016800-7
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    detail.hit.zdb_id: 2969341-X
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    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
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    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
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  • 10
    Online Resource
    Online Resource
    Earth's Free Oscillations Excited by the 26 December 2004 Sumatra-Andaman Earthquake
    American Association for the Advancement of Science (AAAS) ; 2005
    In:  Science Vol. 308, No. 5725 ( 2005-05-20), p. 1139-1144
    Details
    In: Science, American Association for the Advancement of Science (AAAS), Vol. 308, No. 5725 ( 2005-05-20), p. 1139-1144
    Abstract: At periods greater than 1000 seconds, Earth's seismic free oscillations have anomalously large amplitude when referenced to the Harvard Centroid Moment Tensor fault mechanism, which is estimated from 300- to 500-second surface waves. By using more realistic rupture models on a steeper fault derived from seismic body and surface waves, we approximated free oscillation amplitudes with a seismic moment (6.5 × 10 22 Newton·meters) that corresponds to a moment magnitude of 9.15. With a rupture duration of 600 seconds, the fault-rupture models represent seismic observations adequately but underpredict geodetic displacements that argue for slow fault motion beneath the Nicobar and Andaman islands.
    Type of Medium: Online Resource
    ISSN: 0036-8075 , 1095-9203
    URL: Article
    DOI: 10.1126/science.1112305
    RVK:
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    RVK:
    WA 15000
    Language: English
    Publisher: American Association for the Advancement of Science (AAAS)
    Publication Date: 2005
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    SSG: 11
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