by Staff Writers
San Francisco CA (SPX) Apr 20, 2012
Scientists will convene in San Diego to present the latest seismological research at the annual conference of the Seismological Society of America (SSA), April 17-19. This year's meeting is expected to draw a record number of registrants, with more than 630 scientists in attendance, and will feature 292 oral presentations and 239 poster presentations.
"For over 100 years the Annual Meeting of SSA has been the forum of excellence for presenting and discussing exciting new developments in seismology research and operations in the U.S. and globally," said Christa von Hillebrandt-Andrade, president of SSA, which is a scientific society devoted to the advancement of earthquake science. von Hillebrandt-Andrade is manager of the NOAA National Weather Service Caribbean Tsunami Warning Program in Puerto Rico.
A special public town hall meeting is scheduled for the evening of April 17, featuring talks by experts on the seismic hazard to San Diego from future earthquakes and tsunamis.
"We are extremely excited by the range, depth, and quality of science to be presented at this meeting" said David Oglesby, associate professor of earth sciences at the University of California, Riverside. "The meeting will cover all aspects of seismology and earthquake science, from geology to numerical models, and from seismograms to tsunamis.
"Our location near the US-Mexican border also help to illuminate the exciting opportunities in international scientific collaborations," said Oglesby, who is a co-organizer of the conference program along with Raul Castro, a seismologist at the Centro de Investigacion Cientifica y de Educacion Superior de Ensenada, Baja California.
The presentations by the international gathering of seismologists will focus on a broad range of topics, covering the Earth's surface to its center. Some highlights that focus more closely on the San Diego area include:
Downtown San Diego:
Several rupture scenarios of the Rose Canyon fault system were considered including rupture of the associated San Diego fault that traverses downtown San Diego.
The surface faulting hazard for locations along the San Diego fault is estimated to be low because of its low rate of activity but the ground shaking hazard is probably high throughout much of San Diego because of the distributed nature of the Rose Canyon fault system.
The behavior of the Rose Canyon fault system as it traverses San Diego is poorly understood. It is unclear what the role of individual faults in the fault system are in the vicinity of San Diego Bay and the downtown area in a large magnitude 7+ earthquake and how often such events may occur.
"It is clear however that the threat to the city from a future large earthquake is considerable and that research is needed to define what that level of hazard is," said Ivan Wong, principal seismologist and vice president of URS Corporation.
San Jacinto Fault Zone:
Tom Rockwell and other presenters will discuss their work at a news briefing on April 19, beginning at 12:10 p.m. (local time) in the Terrace Salon 2 room of the Town and Country Resort and Convention Hotel.
The new map covers a series of faults in the near-shore portion of the region known as the Inner Continental Borderland, located between the coast and the San Clemente fault, about 35-40 miles offshore.
The crumpled and uplifted seafloor from Santa Monica Bay to the Mexican border includes several high-angled and north-south trending faults. Using high-resolution seismic reflection data from a number of sources, including multiple sources of sonar beamed from research ships and unmanned underwater vehicles, the researchers were able to revise the current map in some surprising ways.
The data show linkages between faults that were not known previously, for example, and in some cases show a fault slip rate of 1-2 millimeters per year.
Seismological Society of America
Bringing Order To A World Of Disasters
When the Earth Quakes
A world of storm and tempest
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Tokyo mega-quake would kill over 9,000: simulation
Tokyo (AFP) April 18, 2012
More than 9,600 people would die with nearly 150,000 injured if a mega-quake struck Tokyo, a disaster that would also level large parts of the Japanese capital, a government projection said Wednesday. The frightening simulation was released by the Tokyo Metropolitan Government as Japan slowly rebuilds its northeast coast, which was devastated by a magnitude 9.0 quake in March last year that ... read more