eprintid: 2152
rev_number: 8
eprint_status: archive
userid: 6
dir: disk0/00/00/21/52
datestamp: 2018-12-20 11:33:59
lastmod: 2018-12-20 11:33:59
status_changed: 2018-12-20 11:33:59
type: article
metadata_visibility: show
creators_name: Kao, Honn
creators_name: Shan, Shao-Ju
corp_creators: Pacific Geoscience Centre, Geological Survey of Canada,
corp_creators: Pacific Geoscience Centre, Geological Survey of Canada,
title: The Source-Scanning Algorithm: mapping the distribution of seismic sources in time and space
subjects: MP1
divisions: EPOS-IP
full_text_status: none
keywords: ETS tremors, seismic source distribution, Source-Scanning Algorithm
abstract: We introduce a new method, which we call the Source-Scanning Algorithm (SSA), for imaging the distribution of seismic sources in both time and space. Using trial locations and origin times, the method calculates the ‘brightness’ function by summing the absolute amplitudes observed at all stations at their respective predicted arrival times. The spatial and temporal distribution of sources is then identified by a systematic search throughout the model space and time for the maximum brightness. The greatest advantages of this method are that: (1) it exploits waveform information (both arrival times and relative amplitudes) without the need to calculate high-frequency synthetic seismograms; and (2) it requires neither pre-assembled phase-picking data nor any a priori assumptions about the source geometry. A series of tests using synthetic data have shown that this method is robust and can faithfully recover the input source configuration to within 1 grid interval. Finally, we demonstrate the value of the algorithm by locating a typical tremor event with emergent waveforms that occurred during the recent episodic tremor and slip (ETS) sequence in the northern Cascadia subduction zone.
date: 2004
date_type: published
publication: Geophysical Journal International
volume: 157
number: 2
publisher: Oxford University Press
pagerange: 589-594
id_number: doi:10.1111/j.1365-246X.2004.02276.x
issn: 0956-540X
official_url: http://doi.org/10.1111/j.1365-246X.2004.02276.x
access_IS-EPOS: limited
software_references: Waveform-based_seismic_event_location
owner: Publisher
citation:   Kao, Honn and Shan, Shao-Ju  (2004) The Source-Scanning Algorithm: mapping the distribution of seismic sources in time and space.  Geophysical Journal International, 157 (2).  pp. 589-594. DOI: https://doi.org/10.1111/j.1365-246X.2004.02276.x <https://doi.org/10.1111/j.1365-246X.2004.02276.x>