TY - RPRT TI - Joint inversion of seismic and magnetotelluric data in the Parkfield Region of California using the normalized cross-gradient constraint AU - Ninfa L. Bennington AU - Haijiang Zhang AU - Cliff Thurber AU - Paul A. Bedrosian PY - 2014 DO - 10.1007/s00024-014-1002-9 UR - https://pubs.usgs.gov/publication/70189075 ID - 70189075 ER -