Cal. Civ. Proc. Code § 2025.430

If the party giving notice of a deposition fails to attend or proceed with it, the court shall impose a monetary sanction under Chapter 7 (commencing with Section 2023.010) against that party, or the attorney for that party, or both, and in favor of any party attending in person or by attorney, unless it finds that the one subject to the sanction acted with substantial justification or that other circumstances make the imposition of the sanction unjust.