an structures that influence earthquakes in Italy, an international team has deployed 39 broad-band seismometers in a two-dimensional array extending from the southern Apennines into Calabria. Calabria is the toe of Italy, and part of the most seismically active belt in Italy. The international project, supported by the National Science Foundation, is known as the Calabrian-Apennine-Tyrrhenian/ Subduction-Collision-Accretion Network (CAT/SCAN). In a series of AGU presentations, members of the team discuss their preliminary findings on what is driving active structures below the earth's surface. Michael Steckler, Doherty Senior Scientist,
steckler@ldeo.columbia.edu, 845-365-8479, Art Lerner-Lam, Director, Center for Hazards and Risk Research, Earth Institute at Columbia (
lerner@ldeo.columbia.edu, 845-365-8356), Leonardo Seeber, Doherty Senior Research Scientist, LDEO, (
nano@ldeo.columbia.edu, 845-365-8385), and Deirdre Commins, Postdoctoral Research Fellow, LDEO (
dcommins@ldeo.columbia.edu, 845-365-8580).
SEISMICITY AND FAULT STRUCTURE IN CA: IMPROVED DATA AND IMAGING
Felix Waldhauser, David Schaff, and colleagues present research aimed at increasing understanding of seismicity and fault structures throughout Northern California. The research team used the previously known techniques of waveform cross correlation to improve seismic arrival time measurements, and multiple event location techniques to reduce model errors. They applied these techniques on a massive scale to all 250,000 events recorded in the NCSN catalog of Northern California. The authors comment on and present results from ongoing efforts, based on these newly adjusted data, to produce more accurate and detailed images of fault structures in Northern California and their correlation wit
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Contact: Mary Tobin
mtobin@ldeo.columbia.edu
845-365-8607
The Earth Institute at Columbia University
13-Dec-2004
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