Recent News

Line of Sight Deformation from Mw 7.8 Gorkha EQ

By processing satellite radar imagery collected before and after the the Mw 7.8 earthquake in Nepal, IGPP’s Eric Lindsey, Xiaohua Xu, and David Sandwell have been able to successfully produce line of sight deformation data for the region.  Imagery and information, about the satellites used, are available at

Zhitu Ma wins GJI best student paper in 2014

Congratulations to graduate student Zhitu Ma for winning the Geophysical Journal International prize for best student paper in 2014.

Science publishes Paolo and Fricker's 18-year study of changing Antarctic ice sheet shelves

The findings of a recent study on Antarctic ice sheet thinning by IGPP geophysicists, Fernando Paolo and Helen Fricker, have been published in the March 26, 2015 issue of Science. Ph.D. student Paolo, glaciologist Fricker, and Laurie Padman, of Earth & Space Research Space Agency, reviewed 18 years of imagery gathered during European Space Agency satellite radar altimetry missions to conduct their research.

GISMOS Gathers Detailed Pre-storm Data

Track GISMOS (GNSS [Global Navigation Satellite System] Instrument System for Multistatic and Occultation Sensing) as it gathers onshore moisture feeding data (for the 3-4 days of heavy rain forecasted in Northern California). GISMOS is gathering data from its perch aboard the NOAA G-IV aircraft during the NOAA CALWATER2015 Atmospheric Rivers campaign.

Sandwell and Garcia satellite altimetry-based marine gravity featured in Science

Congratulations to David Sandwell and Soli Garcia. Their paper "New global marine gravity model from CryoSat-2 and Jason-1 reveals buried tectonic structure" will appear in the October 3, 2014 issue of Science! See:

Agnew and Borsa research featured in Science!

Duncan Agnew and Adrian Borsa's research on drought-related western uplift is featured in the September 26, 2014 issue of Science! See:

Adrian Borsa on KPBS Midday Edition

IGPP researcher Adrian Borsa appeared on KPBS's Midday Edition August 25 to discuss drought-related uplift in the western U.S. with USGS's Randy Hanson and KPBS's Amita Sharma. The full video may be viewed here.

In Memory of J. Freeman Gilbert, 1931-2014

Friends and colleagues of J. Freeman Gilbert are encouraged to write to to share their fond memories and condolences. The obituary of IGPP's second director, J. Freeman Gilbert may be read here.

IGPP Mourns former Director J. Freeman Gilbert

IGPP is very sad to report the loss J. Freeman Gilbert, former Director and Distinguished Professor Emeritus of geophysics who died on Aug.15th.

During his 53 years with IGPP, Freeman was beloved by a long list of colleagues and former students who he has mentored throughout his long and illustrious career. He was the first faculty member hired at IGPP and its second Director. His seminal work on observing and interpreting the frequencies of the normal modes of oscillation of Earth led him to create the IDA (International Deployment of Accelerometers) project, and he was instrumental in creating the Incorporated Research Institutions for Seismology (IRIS) in 1984 at a workshop held at Scripps. His awards and honors included AGU’s William Bowie Medal, the organization’s highest honor, which recognizes outstanding contributions to fundamental geophysics and for unselfish cooperation in research; membership in the National Academy of Sciences; membership in the Italian Accademia dei Lincei; and the Balzan Prize.

Zhan and Shearer deep earthquake observations published in Science

IGPP Postdoc Zhongwen Zhan and Professor Peter Shearer, in collaboration with researchers at Caltech, have shared their recent observations on the high-rupture speeds of deep earthquakes in the July 11, 2014 issue of Science. Zhan and Shearer's discoveries, which provide new insight into both deep and near-surface earthquakes, came about as they researched the aftershocks of the M8.3 Sea of Okhotsk event of May 24, 2103.