TAG: tsunami

Down in the Flood with GPS

March 31, 2015By

Surveyors, prepare to get your feet wet. Global warming is about to hit you in the job list. By 2050, a majority of U.S. coastal areas are likely to be threatened by 30 or more days of flooding each year. This according to a December report in Earth's Future, a journal of the American Geophysical Union. read more

Langley’s Ionosphere Research Focus of CBC Report

March 5, 2015By

CBC News interviewed GPS World Innovation Editor Richard Langley about his ionosphere interference research project with NASA, reported on earlier this week. Langley, a professor at the University of New Brunswick, is working with the Jet Propulsion Laboratory in California to better understand how the ionosphere is disturbed by a variety of phenomena including solar outbursts and other natural hazards such as... read more

ION Seeks Abstracts for Pacific PNT 2015, PTTI Registration Opens

September 2, 2014By

Abstract submissions are now being accepted for The Institute of Navigation’s (ION) Pacific PNT Conference, to be held April 20-23, 2015, at the Waikiki Beach Marriott, Honolulu, Hawaii. Abstracts are due November 14, 2014. Pacific PNT, where “East Meets West in the Global Cooperative Development of Positioning, Navigation and Timing Technology,” brings together policy and technical leaders from Japan, Singapore, China, South... read more

Researchers See Ionospheric Signature of North Korean Nuclear Test

February 15, 2013By

The explosion of an underground nuclear device by North Korea this week disturbed the Earth’s ionosphere. The blast generated infrasonic waves that propagated all the way to the upper atmosphere causing small variations in the density of electrons there. By analyzing the signals from GPS satellites collected at ground-based monitoring stations in South Korea and Japan, scientists at the California Institute of... read more

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JPL Team Uses GPS for Tsunami Early Warning

June 8, 2012By

Led by Dr. Attila Komjathy, who received his Ph.D. from the University of New Brunswick in 1997, a team from NASA's Jet Propulsion Laboratory has demonstrated a technique that has the potential to significantly improve tsunami monitoring and warning. The technique uses data from multiple Global Positioning System receivers on the ground to measure small perturbations in the ionosphere's electron density caused by a tsunami. read more

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Innovation: Tsunami Detection by GPS

February 1, 2008By
QuickBird satellite image of Kalutara Beach on the southwestern coast of Sri Lanka showing the receding waters and beach damage from the Sumatra tsunami.

How Ionospheric Observations Might Improve the Global Warning System
Recent investigations have demonstrated that GPS might be an effective tool for improving the tsumani early-warning system through rapid determination of earthquake magnitude using data from GPS networks. A less obvious approach is to use the GPS data to look for the tsunami signature in the ionosphere. read more

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