“Scientists have long believed tsunamis form from vertical deformation of seafloor during undersea earthquakes. However, seismograph and GPS data show such deformation from the 2004 Sumatra earthquake was too small to generate the powerful tsunami that ensued. Song’s team found horizontal forces were responsible for two-thirds of the tsunami’s height, as observed by three satellites (NASA’s Jason, the U.S. Navy’s Geosat Follow-on and the European Space Agency’s Environmental Satellite), and generated five times more energy than the earthquake’s vertical displacements. The horizontal forces also best explain the way the tsunami spread out across the Indian Ocean. The same mechanism was also found to explain the data observed from the 2005 Nias earthquake and tsunami. ”
Tag Archive for 'GPS'
Funded by the EU’s Sixth Framework Programme (FP6), the DEWS project will aim to strengthen early warning capacities in the region by building an open and interoperable tsunami early warning system for the Indian Ocean.
The system to detect tsunamis will be based on an open sensor platform and integrated sensor systems for earthquake (seismic), sea level (tide gauge, buoys) and ground displacement (GPS land stations) monitoring.
These sensor systems will be one of the most important innovations in the project as they will be responsible for sending reliable data from the seafloor to the warning centre.
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BBC NEWS | Science/Nature | Tsunami concern for Bay of Bengal
Now, Phil Cummins, lead author on the Nature paper and a geologist at Geoscience Australia, believes this is not the case.He said: “I reviewed the geological literature and found the evidence for a lack of tectonic activity along the Myanmar coast was not compelling.”
Historical evidence
Recent GPS data, he said, suggested that the plate boundary was at sea in this area, hidden below thick layers of sediment.
The days of SMS are numbered now that mobile email access is becoming a commodity, research firm Gartner says.
Long the preserve of businessmen in power suits, mobile email is about to hit the masses with one in five email users accessing their accounts wirelessly by 2010, according to Gartner.
Monica Blasso, the firm’s research vice-president, said mobile email had moved beyond the BlackBerry and was increasingly a feature of even low-cost mobile phones, driving consumer adoption.
“By 2012, wireless email products will be fully inter-operable, commoditised and have standard features,” she said. “They will be shipping in larger volumes at greatly reduced prices.”
Today there are less than 20 million wireless email users worldwide, but this will grow to 350 million, or 20 per cent of all email…
NSF EXPLORATORY WORKSHOP ON SENSOR BASED INFRASTRUCTURE FOR EARLY TSUNAMI DETECTION, Maui, Feb 9-10, 2006
What I learned during my visits to the Civil Defense Center and the Tsunami Museum in Hilo and the Pacific Tsunami Warning Center in Ewa Beach in Hawai’i last January greatly contributed to the disaster communication research program undertaken by LIRNEasia in the aftermath of the 2004 Indian Ocean tsunami. Therefore, I welcomed the opportunity to step back and reflect on the research program a year later, also in Hawai’i.
The occasion was a workshop funded by the National Science Foundation of the US. It was organized by Louise Comfort, Daniel Mosse and Taieb Znati, all at the U of Pittsburgh. Louise is from Public Policy and has been working on disasters for…
Colombo, Sri Lanka, 8 November 2005: An addressable satellite radio system for hazard warning was demonstrated to Sir Arthur C. Clarke in Colombo, Sri Lanka this week.
It has been designed by WorldSpace, Inc., in collaboration with Raytheon Corporation of the US, at the request of LIRNEasia, a Sri Lankan research organization.
The satellite radio is the first device to incorporate the Common Alert Protocol (CAP). The radio set can be switched on from the master control, and converted from a conventional radio to a specialized hazard alert system. The equipment was field tested in Sri Lanka, including at several Sarvodaya villages that were affected by the Asian Tsunami of December 2004.
It was apt that the first demonstration of this new technology involved Sir Arthur – who…
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