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Determination of fault plane orienta...

Osburg, Tim.

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Determination of fault plane orientations from rupture directivity of intermediate and deep earthquakes in the northeastern Japan subduction zone.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Determination of fault plane orientations from rupture directivity of intermediate and deep earthquakes in the northeastern Japan subduction zone./
Author:	Osburg, Tim.
Description:	116 p.
Notes:	Source: Masters Abstracts International, Volume: 51-01.
Contained By:	Masters Abstracts International51-01(E).
Subject:	Geophysics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1515545
ISBN:	9781267507525

Determination of fault plane orientations from rupture directivity of intermediate and deep earthquakes in the northeastern Japan subduction zone.
Osburg, Tim.

Determination of fault plane orientations from rupture directivity of intermediate and deep earthquakes in the northeastern Japan subduction zone. - 116 p.

Source: Masters Abstracts International, Volume: 51-01.

Thesis (M.S.)--Saint Louis University, 2012.

Earthquakes occur at intermediate (≥ 70 km) and deep (≥ 300 km) depths within the Earth. Since their discovery, the cause of intermediate and deep-focus earthquakes has remained a fundamental problem in seismology. While several physical mechanisms have been theorized to explain the occurrence of deep earthquakes, the mechanism may be constrained by determining the fault plane orientation.

ISBN: 9781267507525Subjects--Topical Terms:

535228
Geophysics.

Determination of fault plane orientations from rupture directivity of intermediate and deep earthquakes in the northeastern Japan subduction zone.
LDR:02316nam a2200277 4500 001 1965464
005 20141030134110.5
008 150210s2012 ||||||||||||||||| ||eng d
020 $a 9781267507525
035 $a (MiAaPQ)AAI1515545
035 $a AAI1515545
040 $a MiAaPQ $c MiAaPQ
100 1 $a Osburg, Tim. $3 2102125
245 1 0 $a Determination of fault plane orientations from rupture directivity of intermediate and deep earthquakes in the northeastern Japan subduction zone.
300 $a 116 p.
500 $a Source: Masters Abstracts International, Volume: 51-01.
500 $a Adviser: Linda M. Warren.
502 $a Thesis (M.S.)--Saint Louis University, 2012.
520 $a Earthquakes occur at intermediate (≥ 70 km) and deep (≥ 300 km) depths within the Earth. Since their discovery, the cause of intermediate and deep-focus earthquakes has remained a fundamental problem in seismology. While several physical mechanisms have been theorized to explain the occurrence of deep earthquakes, the mechanism may be constrained by determining the fault plane orientation.
520 $a I used rupture directivity of 52 events in the northeastern Japan subduction zone to determine each event's fault plane orientation. With adequate station coverage, in both azimuth and distance, rupture can be identified along a single nodal plane signifying the fault plane. P-wave duration is shortest in the direction of rupture propagation and greatest in the opposite direction. Measuring the differential rupture duration between seismic stations allows for the determination of rupture direction, rupture velocity relative to the background seismic velocity, and the fault plane for each event. Rupture directivity is determined for a total of 20 events. Results indicate that rupture at intermediate and deep focus depths occur along the subhorizontal nodal plane. While fault plane orientation is apparently uniform in the subducting slab, rupture direction appears scattered. These results suggest multiple mechanisms are responsible for the orientation and azimuthal direction of rupture.
590 $a School code: 0193.
650 4 $a Geophysics. $3 535228
690 $a 0373
710 2 $a Saint Louis University. $b Geophysics. $3 2102126
773 0 $t Masters Abstracts International $g 51-01(E).
790 $a 0193
791 $a M.S.
792 $a 2012
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1515545