Recursos de colección

Caltech Authors (147.820 recursos)

Repository of works by Caltech published authors.

Mostrando recursos 1 - 3 de 3

  1. Permanent upper plate deformation in western Myanmar during the great 1762 earthquake: Implications for neotectonic behavior of the northern Sunda megathrust

    Wang, Yu; Shyu, J. Bruce H.; Sieh, Kerry; Chiang, Hong-Wei; Wang, Chung-Che; Aung, Thura; Lin, Yu-nung Nina; Shen, Chuan-Chou; Min, Soe; Than, Oo; Lin, Kyaw Kyaw; Tun, Soe Thura
    The 1762 Arakan earthquake resulted from rupture of the northern Sunda megathrust and is one of those rare preinstrumental earthquakes for which early historical accounts document ground deformations. In order to obtain more comprehensive and detailed measurements of coseismic uplift, we conducted comprehensive field investigations and geochronological analyses of marine terraces on the two largest islands in western Myanmar. We confirm 3–4 m of coseismic coastal emergence along southwestern Cheduba Island, diminishing northeastward to less than 1 m. Farther northeast, uplift associated with the earthquake ranges from slightly more than 1 m to 5–6 m along the western coast of Ramree Island but is...
    (application/pdf) - 18-abr-2017

  2. The 2011 Magnitude 9.0 Tohoku-Oki Earthquake: Mosaicking the Megathrust from Seconds to Centuries

    Simons, Mark; Minson, Sarah E.; Sladen, Anthony; Ortega, Francisco; Jiang, Junle; Owen, Susan E.; Meng, Lingsen; Ampuero, Jean-Paul; Wei, Shengji; Chu, Risheng; Helmberger, Donald V.; Kanamori, Hiroo; Hetland, Eric; Moore, Angelyn W.; Webb, Frank H.
    Geophysical observations from the 2011 moment magnitude (M_w) 9.0 Tohoku-Oki, Japan earthquake allow exploration of a rare large event along a subduction megathrust. Models for this event indicate that the distribution of coseismic fault slip exceeded 50 meters in places. Sources of high-frequency seismic waves delineate the edges of the deepest portions of coseismic slip and do not simply correlate with the locations of peak slip. Relative to the M_w 8.8 2010 Maule, Chile earthquake, the Tohoku-Oki earthquake was deficient in high-frequency seismic radiation-a difference that we attribute to its relatively shallow depth. Estimates of total fault slip and surface...
    - 05-oct-2016

  3. Earthquakes and slip rate of the southern Sagaing fault: insights from an offset ancient fort wall, lower Burma (Myanmar)

    Wang, Yu; Sieh, Kerry; Aung, Thura; Min, Soe; Khaing, Saw Ngwe; Tun, Soe Thura
    Field investigations of an ancient fortress wall in southern Myanmar reveal an offset of ~6 m across the Sagaing fault, the major right-lateral fault between the Sunda and Burma plates. The fault slip rate implied by offset of this 16th-century fortress is between 11 and 18 cm yr^(–1). A palaeoseismological excavation within the fortress reveals at least two major fault ruptures since its construction. The slip rate we obtained is comparable to geodetic and geological estimates farther north, but is only 50 per cent of the spreading rate (38 mm yr^(–1)) at the Andaman Sea spreading centre. This disparity suggests...
    (application/pdf; application/zip) - 24-ago-2016

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