San Francisco Bay area deformation measured with Interferometric SAR

E. Fielding  JPL/NASA/Caltech

collaborators:

R. Bürgmann  UC Berkeley

New results from Envisat 2010+:

Since 27 October 2010, the European Space Agency (ESA) Envisat satellite has been in a new orbit, called the "2010+" phase of the Envisat mission. The new orbit repeats a given track every 30 days, allowing interferograms to be formed with 30-day intervals. They have imaged the San Francisco Bay twice in the new orbit, allowing us to create these two interferograms. The Envisat original data is copyright 2010 ESA, and was provided under the AOE-668 project.

Envisat ascending track wrapped interferogram, processed with precise orbits

The image above is an interferogram or radar image difference from the ESA Envisat satellite, using images acquired on 3 November and 3 December 2010 on ascending track 92. The color bands are likely due to variations of water vapor in the atmosphere. Baseline (distance between the two orbits) was about 600 m. Attribution for this image is Eric Fielding/JPL/NASA/ESA.

Envisat descending track wrapped interferogram, processed with precise orbits

The image above is an interferogram or radar image difference from the ESA Envisat satellite, using images acquired on 6 November and 6 December 2010, on descending track 142. The color bands are likely due to variations of water vapor in the atmosphere. Baseline (distance between the two orbits) was about 120 m. Attribution for this image is Eric Fielding/JPL/NASA/ESA.

Advanced results and modeling:

a five-year measurement of apparent deformation

PIA02651: Hayward Fault, California Interferogram

Bürgmann, R., Schmidt, D., Nadeau, R. M., d'Alessio, M., Fielding, E., Manaker, D., McEvilly, T. V., and M. H. Murray, Earthquake potential along the northern Hayward Fault, California, Science, 289, 1178-1182, 2000.

2000 Press release by JPL available at:
Study Finds Reduced Quake Risk on Northern California Fault

Early results:

Bürgmann, R., Fielding, E., and Sukhatme, J., 1998, Slip along the Hayward fault, California, estimated from space-based synthetic aperture radar interferometry, Geology, 26, no. 6, 559-562