Slow tilt reversal of the Lesser Himalaya between 1862 and 1992 at 78°E, and bounds to the southeast rupture of the 1905Kangra earthquake

Details Slow tilt reversal of the Lesser Himalaya between 1862 and 1992 at 78°E, and bounds to the southeast rupture of the 1905Kangra earthquake Slow tilt reversal of the Lesser Himalaya between 1862 and 1992 at 78°E, and bounds to the southeast rupture of the 1905Kangra earthquake

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001geoji.144..713b&link_type=abstract

Geophysical Journal International, Volume 144, Issue 3, pp. 713-728.

Astronomy and Astrophysics

Astronomy

6

Earthquake, Himalaya, Kangra, Levelling, Tilt

Scientific paper

Measurements between 1862 and 1992 of a 77-km-long spirit levelling line that crosses the main frontal thrust of the Himalaya near Dehra Dun (78°E) reveal a slow reversal of tilt in the early part of the last century, unperturbed by the destructive 1905 April4 Kangra earthquake, 200km to the northwest. The Lesser Himalaya are inferred to be tilting currently to the northeast at 0.08µradyr-1, with similar rate but opposite sign to their tilt in 1862. The absence of co-seismic deformation near Dehra Dun in 1905 indicates that the Kangra rupture terminated short of Dehra Dun, consistent with a revised Ms=7.8 estimate for the size of the Kangra earthquake, but inconsistent with previous analyses of the levelling data that interpret a large slope-dependent systematic error as co-seismic slip. The reversal in tilt corresponds to a linear northeast-down tilt acceleration of 0.0015+/-0.0004µradyr-2.

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