College of Science

WOMEN IN PHYSICS SPECIAL SEMINAR: Using GPS to Study Earthquakes, Weather, and Hydrology [Angelyn Moore, Jet Propulsion Lab]

WOMEN IN PHYSICS SPECIAL SEMINAR: Using GPS to Study Earthquakes, Weather, and Hydrology [Angelyn Moore, Jet Propulsion Lab]

May 24, 2018 11:00 AM to May 24, 2018 12:00 PM at Building 8, Room 241

 
Title:  Using GPS to Study Earthquakes, Weather, and Hydrology
Angelyn Moore [Jet Propulsion Laboratory, California Institute of Technology]
Abstract: Signals emitted by the Global Positioning System (GPS) satellites are received by smartphones and cars, and also by tens of thousands of permanent scientific GPS stations around the globe. By using state-of-the art GPS equipment and data processing techniques, tectonic motions can be measured to a precision of 1-2mm horizontally and 3-5mm vertically, which reveals precisely how the ground moves during and between earthquakes. Serendipitously, the determination of these precise positions also reveals information about the amount of water vapor in the atmosphere above each station, which is used by operational weather forecasters to improve their modeled forecasts as well as situational awareness during developing severe weather events. These stations also detect changes in snow, soil moisture, and vegetation in a ~1000m2 area by analyzing the satellite signals that have reflected off the ground before arriving at the antenna. I’ll discuss the equipment, analysis, and results of using GPS to study earthquakes, weather, and hydrology.
 
10:50 am Refreshments
11:00 am Seminar
Building 8, Room 241