1-1-1-1-1-1-1-1-1-1-1-1-1-1 From: Daniel Juncu <D.Juncu@xxxxxxxxxxx> Dear Colleagues, The Centre for Observation and Modelling of Earthquakes, Volcanoes, and Tectonics (COMET) invites you to the next instalment of our webinar series, viewable from the home office. Coming up next: *Dr. Tamarah King *(University of Oxford) *Movers and shakers down-under: what Australian surface ruptures tell us about intraplate faults, seismic hazard, and reverse earthquake strong ground motions. * The webinar will take place on *Thursday the 28th of May 2020 at 16:00 UK time* (GMT+1). *If you want to attend the webinar please register at https://us02web.zoom.us/webinar/register/WN_OOf9PjNwT1ylO6PTDUyyIQ <https://us02web.zoom.us/webinar/register/WN_OOf9PjNwT1ylO6PTDUyyIQ>* (After registering, you will receive a confirmation email containing information on how to join the webinar) *Abstract* *Australian earthquakes offer unique opportunities to investigate surface effects of reverse rupturing faults. Eleven historic surface-rupturing earthquakes (MW 4.7 â?? 6.6) have occurred since 1968 in arid, low-relief, bedrock dominated areas with little to no anthropogenic influence. These events provide inputs for many intraplate and global scaling relationships, yet remote-sensing techniques and reassessment of published historic data raises questions regarding how to define fault length, offset and width values, with implications for the accuracy of scaling relationships reliant on these inputs. Available geological and geophysical data from ten of these events indicate that rupture propagated parallel to the trace of, and possibly along, pre-existing Precambrian bedrock structures, with no unambiguous geological evidence for preceding surface-rupturing earthquakes. The apparent lack of recurrence on historically rupturing faults has implications for how â??activeâ?? faults and â??slip-ratesâ?? are defined for seismic hazard analysis in intraplate stable continental regions, and raises questions for how strain accumulates and dissipates in these crustal settings. Finally, in the absence of near-field instrumentation, the direction and distances of 1,437 co-seismically displaced rock fragments (chips) provide a dense proxy-record of strong ground motion directionality in the near-field of a MW 6.1 earthquake in Central Australia.* 1-1-1-1-1-1-1-1-1-1-1-1-1-1 ============================================================== Volcano Listserv is a collaborative venture among Arizona State University (ASU), Portland State University (PSU), the Global Volcanism Program (GVP) of the Smithsonian Institution's National Museum of Natural History, and the International Association for Volcanology and Chemistry of the Earth's Interior (IAVCEI). ASU - http://www.asu.edu/ PSU - http://pdx.edu/ GVP - http://www.volcano.si.edu/ IAVCEI - https://www.iavceivolcano.org/ To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxx. To contribute to the volcano list, send your message to: volcano@xxxxxxx. Please do not send attachments. ============================================================== ------------------------------ End of Volcano Digest - 13 May 2020 to 15 May 2020 (#2020-50) *************************************************************
