November 4, 1927 Earthquake: Off Coast, S, California, United States

1927, Nov 4, 13:50 UTC. 34.7 N, 120.8 W, magnitude 7.0 MS, intensity VIII. The most severe damage to property occurred in the areas west and north of Lompoc. Chimneys were wrecked at several towns, including Arroyo Grande, Berros, Guadalupe, Halcyon, Lompoc, Los Alamos, and Nipomo. On the Roberd's ranch, an earthquake fountain created between 10 and 20 sand craters; lurches and cracks were observed in the water-soaked soil. The Roberd ranch house was shifted on its foundation about 5 cm, and small outbuildings were pushed from their foundations. The walls of a poorly built block building collapsed at White hills. At Santa Marina and other towns in the area, chimneys were damaged, old brick walls and interior walls formed cracks, and cornices fell.

Near Surf, west of Lompoc, the Southern Pacific Railroad bridge was thrown out of alignment near its center; a concrete highway was cracked; and small rockslides and earthslides occurred. Cracks formed in the ground about 6.5 km north of Arlight. Felt from Morgan Hill south to Redondo Beach and from the east coast to Kernville.

A tsunami was recorded on tide gages at San Francisco, La Jolla, San Diego, and Fort Point and waves were observed at Pismo, Port San Luis (1.5 m) and Surf (1.8 m).

Many aftershocks occurred.

(above from reference #542)

1927 November 4, 5:51 local time. There was a strong earthquake with source on the edge of the shelf on the northern boundary of the Murray fault zone. Large slides took place on the coast in the Santa Barbara district, and the movement of traffic on the railway was interrupted. Flues were damaged at Lompoc and other coastal settlements. A very strong seaquake was felt on the "Sokonia" 50 km (27 miles) from Arguello Point, on the "Alaska Standard", 25 km (15 miles) from the same cape and on other vessels (Reference #415).

1927, Nov. 4. 34.5 N, 121.4 W, magnitude 7.5, MMI intensity IX. (reference #1202)

1927, Nov. 4, 13:50:43 UTC. 34.5 N, 121.4 W, magnitude 7.3. (reference #130)

1927, Nov. 4, 13:50:43 UTC. 34.5 N, 121.5 W, magnitude 7.3 MS, shallow depth. (reference #88)

1927, Nov. 4, 13:51:4.75 UTC. 34.915 N, 121.031 W, depth 15 km, magnitude 7.1 Ms GSX, 7 Ms ABE1, 7.3 mB ABE1. (reference #9910)

1927, Nov 4, 13:51:03.81 UTC. 34.813 N, 120.774 W, depth 10 km, magnitude 7.3 Mw. (referene #10476)