Episodic tremor and slip on the Cascadia subduction zone: The chatter of silent slip

Science

Volumn 300, Issue 5627, 2003, Pages 1942-1943

  Rogers, Garry ^a   Dragert, Herb ^a  

^a Geological Survey of Canada Sidney   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

INTERFACES (MATERIALS); LOADING; REAL TIME SYSTEMS; STRESSES;

SLIP EVENTS;

SEISMOLOGY;

CRUSTAL MOVEMENT; EARTHQUAKE; SEISMICITY; SLIP; SUBDUCTION ZONE;

ARTICLE; CANADA; EARTHQUAKE; GLOBAL POSITIONING SYSTEM; MOTION; PRIORITY JOURNAL; TIME;

NORTH AMERICA; PACIFIC OCEAN;

EID: 0037600653     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1084783     Document Type: Article

References (12)

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8. Precise dates for slip events were derived as follows: First, linear regression was used to estimate the long-term linear trend of the observed time series, corrected for offsets introduced by GPS antenna changes. Next, approximate dates (to within a week) for slip transients were identified from a visual inspection of the time series, and regression was again used to estimate an annual signal, the magnitude of the offsets at the time of the slips, and the average linear trend for the time periods between slip events. A 180-point symmetric sawtooth time series was generated using the average interslip trend and the average value of the offsets. This abbreviated sawtooth function was cross-correlated with the original observed (but de-trended) time series and the maxima for the cross-correlation function were used to establish the midpoint of slip events.
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12. We thank M. Schmidt and Y. Lu for their support in GPS network operations; R. Baldwin, T. Claydon, and R. Hall for their support in seismic network operations; and J. Cassidy and W. Bentkowski for help in locating tremors. This paper is Geological Survey of Canada contribution no. 2003022. Copyright, Her Majesty the Queen in right of Canada (2003).