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Spatial and temporal study of the se...

The University of Texas at El Paso., Geophysics.

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Spatial and temporal study of the seismicity of the hypocentral region of the Great 1964 Alaskan Earthquake.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Spatial and temporal study of the seismicity of the hypocentral region of the Great 1964 Alaskan Earthquake./
Author:	De La Pena, Alejandro.
Description:	63 p.
Notes:	Adviser: Diane I. Doser.
Contained By:	Masters Abstracts International45-06.
Subject:	Geology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1444084
ISBN:	9780549010036

Spatial and temporal study of the seismicity of the hypocentral region of the Great 1964 Alaskan Earthquake.
De La Pena, Alejandro.

Spatial and temporal study of the seismicity of the hypocentral region of the Great 1964 Alaskan Earthquake. - 63 p.

Adviser: Diane I. Doser.

Thesis (M.S.)--The University of Texas at El Paso, 2007.

In March 28, 1964, the largest earthquake (9.2 MW) in North America occurred in south-central Alaska (SCA). The epicenter of this great earthquake was in Prince William Sound (PWS) (Figure 1). The earthquake occurred as a result of underthrusting of the Pacific plate and Yakutat Block beneath the North American plate along an 800 km long stretch of the Alaska subduction zone (Christensen and Beck, 1994). This study focuses on relocating events that occurred in the time period from 1989 to 2001 in a region of 100 by 165 km surrounding the epicenter of the 1964 mainshock. It also includes waveform modeling of two events (Mw 6.5 & 6.4) that occurred in 1983 east of the mainshock. The relocation process was conducted using a double difference relocation program (HypoDD, Waldhauser, 2001) that better defines patterns of seismicity. The relocation results were compared to gravity and magnetic data of the area. The results suggest that the main clusters of seismicity are concentrated in the Wadati-Benioff zone, and along major faults that represent the boundaries between accreted terranes. Body waveform modeling results better constrained the depths of the 1983 events to 30-31 km and provided information about their source parameters. Their source time functions showed no clear effects of directivity. Their focal mechanisms confirmed that the events had occurred within the subducting slab, and their stress drops were consistent with other intraplate events.

ISBN: 9780549010036Subjects--Topical Terms:

516570
Geology.

Spatial and temporal study of the seismicity of the hypocentral region of the Great 1964 Alaskan Earthquake.
LDR:02370nam 2200277 a 45 001 854272
005 20100702
008 100702s2007 ||||||||||||||||| ||eng d
020 $a 9780549010036
035 $a (UMI)AAI1444084
035 $a AAI1444084
040 $a UMI $c UMI
100 1 $a De La Pena, Alejandro. $3 1020599
245 1 0 $a Spatial and temporal study of the seismicity of the hypocentral region of the Great 1964 Alaskan Earthquake.
300 $a 63 p.
500 $a Adviser: Diane I. Doser.
500 $a Source: Masters Abstracts International, Volume: 45-06, page: 3094.
502 $a Thesis (M.S.)--The University of Texas at El Paso, 2007.
520 $a In March 28, 1964, the largest earthquake (9.2 MW) in North America occurred in south-central Alaska (SCA). The epicenter of this great earthquake was in Prince William Sound (PWS) (Figure 1). The earthquake occurred as a result of underthrusting of the Pacific plate and Yakutat Block beneath the North American plate along an 800 km long stretch of the Alaska subduction zone (Christensen and Beck, 1994). This study focuses on relocating events that occurred in the time period from 1989 to 2001 in a region of 100 by 165 km surrounding the epicenter of the 1964 mainshock. It also includes waveform modeling of two events (Mw 6.5 & 6.4) that occurred in 1983 east of the mainshock. The relocation process was conducted using a double difference relocation program (HypoDD, Waldhauser, 2001) that better defines patterns of seismicity. The relocation results were compared to gravity and magnetic data of the area. The results suggest that the main clusters of seismicity are concentrated in the Wadati-Benioff zone, and along major faults that represent the boundaries between accreted terranes. Body waveform modeling results better constrained the depths of the 1983 events to 30-31 km and provided information about their source parameters. Their source time functions showed no clear effects of directivity. Their focal mechanisms confirmed that the events had occurred within the subducting slab, and their stress drops were consistent with other intraplate events.
590 $a School code: 0459.
650 4 $a Geology. $3 516570
650 4 $a Geophysics. $3 535228
690 $a 0372
690 $a 0373
710 2 $a The University of Texas at El Paso. $b Geophysics. $3 1020598
773 0 $t Masters Abstracts International $g 45-06.
790 $a 0459
790 1 0 $a Doser, Diane I., $e advisor
791 $a M.S.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1444084