The 3rd international summer school on Earthquake Science
“Monitoring physical properties associated with tectonic processes”
The Earthquake Research Institute of the University of Tokyo (ERI) and
the Southern California Earthquake Center (SCEC) organize an international summer school on Earthquake Science in September 4-8, 2015 at Lake Yamanakako, Japan.
We encourage graduate students and postdocs in the field of the international community to participate.
International summer school on Earthquake Science
Top-level scientists for key-note lectures
Encourage graduate students' and postdocs' presentations
Full week poster sessions for discussion
Participants
graduate students and postdocs (about 40 persons)
Sessions
With recent improvements in modern geophysical observations and
developments of new powerful analysis techniques, we have now reached
a stage where we can detect temporal changes of the Earth’s interior
associated with tectonic processes. These temporal changes include
changes of elastic media, crustal and volcanic deformation, and
variability in seismicity and earthquake source mechanisms. This
summer school, in particular, focuses on monitoring of the Earth’s
interior using seismic and geodetic methods. The program is divided
into the following three sessions.
1. Monitoring seismic velocity structure with seismic interferometry
Probing temporal changes in seismic velocity structure is key for
understanding tectonic deformation. Recent developments in seismic
interferometry have allowed for use of ambient noise to monitor
temporal changes in seismic velocities due to earthquakes and volcanic
eruptions. The technique extracts wave propagation between a pair of
stations by cross-correlating seismic ambient noise field. This
session aims to introduce the technique, and review of new
observations.
2. Monitoring crustal deformation
Recent dense geodetic observations on land (e.g., GPS) enable the
monitoring of spatial and temporal variations of crustal deformation
associated with tectonic processes (e.g. co-seismic and post-seismic
deformations of earthquakes, slow slip events, and magma intrusions).
Specifically, “high-rate GPS” allows us to measure time-dependent
surface displacements related to megathrust events, tsunamis and
volcanic eruptions. Satellite geodesy (e.g. inSAR, GRACE) also
provides us a finer picture of Earth surface processes and its gravity
field. This session aims to introduce recent geodetic methods, new
observations, and the physical interpretations resulting from such
studies.
3. Monitoring seismicity
Analysis of seismicity and changes to it is a powerful way to identify
tectonic processes because of how seismicity is sensitive to slight
changes in the mechanical state in depth. The emergence of dense,
low-noise, broadband seismic networks worldwide provides better
information on the spatial–temporal evolution of earthquakes than ever
before. For example, there have been recent observations of
earthquakes that are dynamically triggered, seismicity occurring
before large earthquakes, and earthquake migration linked to dike
intrusions. In addition, anomalous earthquakes such as long/very-long
period earthquakes, non-volcanic and volcanic tremor, and repeating
earthquakes have been detected. This session focuses on new
observations of seismicity changes and quantifying source mechanisms
controlling earthquake and volcanic processes.