eprintid: 1775
rev_number: 12
eprint_status: archive
userid: 6
dir: disk0/00/00/17/75
datestamp: 2016-12-20 12:42:10
lastmod: 2017-02-08 12:21:31
status_changed: 2016-12-20 12:42:10
type: article
metadata_visibility: show
creators_name: Asanuma, Hiroshi
creators_name: Nozaki, Hyuma
creators_name: Niitsuma, Hiroaki
creators_name: Wyborn, D.
corp_creators: Graduate School of Environmental Studies, Tohoku University, Japan
corp_creators: Graduate School of Environmental Studies, Tohoku University, Japan
corp_creators: Graduate School of Environmental Studies, Tohoku University, Japan
corp_creators: Geodynamics Ltd., Australia
title: Interpretation of microseismic events with larger magnitude collected at Cooper Basin, Australia
subjects: MP2
subjects: RA
subjects: RA1
subjects: SG
divisions: SHEER-6
full_text_status: none
keywords: Microseimicity, HDR, HWR, EGS, stimulation, Cooper Basin, Australia,
note: Geothermal Resources Council 2005 Annual Meeting, September 25-28, 2005, Reno, Nevada
abstract: The authors analyzed the spatial and temporal distribution of the microseismic events with larger moment magnitude observed during a hydraulic stimulation at the Australian HFR site in the Cooper Basin. The seismic traces of the large events were saturated and we could not directly estimate the moment magnitude from the trace. Accordingly we estimated the moment magnitude from a combination of the duration time and the local magnitude of smaller unsaturated events. There was no clear relationship between the magnitude of the events so determined and the hydraulic records. Indeed some of the big events occurred even after shut-in. We have found that some of the big events brought very clear extension of the seismic cloud into previously seismically silent zones suggesting that some kind of hydraulic barrier was broken by the big events. The authors currently consider that the microseismic events at this site mainly originate from a slip of asperities in existing fractures. Control and prediction of the big events at this site requires further study.
date: 2005-01
date_type: published
publication: Geothermal Resources Council Transactions
volume: 29
number: 0193-
publisher: Geothermal Resources Council
pagerange: 87-92
issn: 0193-5933
official_url: https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1022576
access_IS-EPOS: limited
owner: Publisher
citation:   Asanuma, Hiroshi and Nozaki, Hyuma and Niitsuma, Hiroaki and Wyborn, D.  (2005) Interpretation of microseismic events with larger magnitude collected at Cooper Basin, Australia.  Geothermal Resources Council Transactions, 29 (0193-).  pp. 87-92.