B737 Next Generation Undifferentiated
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 123; Flight Crew Type 1735
Situational Awareness
Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Flight Crew Took Evasive Action; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Human Factors
We were established on the SFO FMS Bridge Visual Rwy 28R crossing the F101D fix (4.4 nm SFO) when the SFO Tower Controller on 120.5 issued a low altitude alert and told us that the altimeter setting was 29.94. I crossed checked the altitude and it showed us at 890' msl which was 310' below the published altitude at F101D. The First Officer was the Pilot Flying with the autopilot engaged with VNAV/LNAV. Immediately upon hearing the low altitude alert from the SFO Tower Controller the First Officer disconnected the autopilot; added power and began a climb to 1200 ft msl the at or above published altitude at F101D. VNAV Path was annunciated on the FMA but was not captured at F101D. The Tower Controller queried me about the low altitude alert and said that he was going to contact engineering since we were the second aircraft in a row to set off the low altitude alert at the same point. I told the Tower Controller that we were flying the visual approach with the autopilot engaged and didn't catch the low altitude crossing. Since the First Officer recovered/repaired the error we continued to a safe landing in compliance with the stabilized approach criteria.
[Report narrative contained no additional information]
B737NG flight crew reported receiving a low altitude alert from Tower on approach to SFO.