The Parkfield displacement field associated with the 2004 event has been reprocessed in order to better constrain the slip along the fault. A particular focus was on the near-fault observations. Indeed, as the other geodetic techniques (SAR and LiDAR)
cannot provide reliable information near the fault due to a lack of coherency, the accuracy of near-fault GPS displacements is crucial. The new computed displacement field will be published in two research articles (Ahyi and Dreger, in press, JGR) and (Houlié, Dreger, and Romanowicz, in prep.)
Coseismic displacements during the 2004 Parkfield earthquake. The displacement at the CRBT site is less than 3 mm. The displacement observed at PKDB (star) indicates the rupture along the fault is limited in the south.
Berkeley Seismological Laboratory
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