Andrew Frassetto
2012-03-26 20:05:41
The USArray Transportable Array Working Group invites you to attend a
webinar on "The Source Complexities of Recent Megathrust Earthquakes as
Imaged by the Back-Projection Method" on April 4, 2012 from 1-2 pm EST.
Space is limited so please reserve a spot now:
https://www2.gotomeeting.com/register/454159730
After registering you will receive a confirmation email containing
information about joining the webinar.
Following the presentation there will be the opportunity for questions.
Eric Kiser and Miaki Ishii, Department of Earth and Planetary Sciences,
Harvard University
The back-projection method uses array processing techniques to image the
location and timing of energy release of earthquake sources. Though the
basic idea of the method is simple, the necessary data coverage for
obtaining useful results only recently became available through the
development of large aperture, dense seismic arrays such as the High
Sensitivity Seismograph Network in Japan and the Transportable Array in
the United States. Since the pioneering work that used the method to
investigate the rupture properties of the December 26, 2004
Sumatra-Andaman megathrust event, back-projection has been used in a
number of studies, with significant results ranging from the imaging of
supershear rupture to dynamic triggering during deep earthquakes.
For this presentation, we focus on the source properties of the recent
2010 Mw 8.8 Maule, Chile and 2011 Mw 9.0 Tohoku, Japan earthquakes.
Back-projection results show that these ruptures are extremely complex,
with multiple propagation directions and rupture speeds composing each
source. In addition, it is shown that the rupture properties of these
events can vary considerably when data filtered to different frequency
ranges are used in the back-projection analysis. These
frequency-dependent changes in rupture behavior are interpreted in terms
of the tectonic setting and the source processes that may be acting
during the rupture.
System Requirements
PC-based attendees
Required: Windows® 7, Vista, XP or 2003 Server
Macintosh®-based attendees
Required: Mac OS® X 10.5 or newer
webinar on "The Source Complexities of Recent Megathrust Earthquakes as
Imaged by the Back-Projection Method" on April 4, 2012 from 1-2 pm EST.
Space is limited so please reserve a spot now:
https://www2.gotomeeting.com/register/454159730
After registering you will receive a confirmation email containing
information about joining the webinar.
Following the presentation there will be the opportunity for questions.
Eric Kiser and Miaki Ishii, Department of Earth and Planetary Sciences,
Harvard University
The back-projection method uses array processing techniques to image the
location and timing of energy release of earthquake sources. Though the
basic idea of the method is simple, the necessary data coverage for
obtaining useful results only recently became available through the
development of large aperture, dense seismic arrays such as the High
Sensitivity Seismograph Network in Japan and the Transportable Array in
the United States. Since the pioneering work that used the method to
investigate the rupture properties of the December 26, 2004
Sumatra-Andaman megathrust event, back-projection has been used in a
number of studies, with significant results ranging from the imaging of
supershear rupture to dynamic triggering during deep earthquakes.
For this presentation, we focus on the source properties of the recent
2010 Mw 8.8 Maule, Chile and 2011 Mw 9.0 Tohoku, Japan earthquakes.
Back-projection results show that these ruptures are extremely complex,
with multiple propagation directions and rupture speeds composing each
source. In addition, it is shown that the rupture properties of these
events can vary considerably when data filtered to different frequency
ranges are used in the back-projection analysis. These
frequency-dependent changes in rupture behavior are interpreted in terms
of the tectonic setting and the source processes that may be acting
during the rupture.
System Requirements
PC-based attendees
Required: Windows® 7, Vista, XP or 2003 Server
Macintosh®-based attendees
Required: Mac OS® X 10.5 or newer
