Diablo Canyon Nuclear power plant is just 10km from the active offshore Hosgri Fault Zone.
Diablo Canyon Nuclear power plant is just 10km or so, if that, from the active offshore Hosgri Fault Zone. The last major earthquake on or near this fault was as recently as 1927, and a powerful probable 7.1 - 7.3. It "produced a sea-quake (compressional shock transmitted by water) and a seismic sea wave". 'Diablo' means 'Devil' in Spanish, such an apt name for a Nuclear power plant.
"Hosgri Fault Zone:
TYPE OF FAULT: primarily reverse and thrust, with some right-lateral slip
LENGTH: at least 140 km; complex zone of interlaced and parallel fault segments
NEAREST COMMUNITIES: San Simeon, Cambria, Morro Bay, Surf
LAST MAJOR RUPTURE: November 4, 1927, ML7.3 (?)
MOST RECENT SURFACE RUPTURE: Holocene, in part; otherwise Quaternary
SLIP RATE: unknown
INTERVAL BETWEEN MAJOR RUPTURES: unknown
PROBABLE MAGNITUDES: MW6.5 - 7.5
OTHER NOTES: Faults dip to the northeast. This zone is entirely offshore, with the possible exception of the San Simeon fault, which spans the 18 km between San Simeon and Ragged Point (northwest of the region covered on this map). The earthquake of 1927 is poorly located and may not have occurred on the Hosgri fault zone. "
"TIME November 4, 1927 / 5:49 am, PST
LOCATION 33° 43' N, 120° 46' W in the Lompoc area, about 16 km (10 miles) offshore
MAGNITUDE ML 7.1
TYPE OF FAULTING uncertain
FAULT INVOLVED: uncertain; possibly the Hosgri Fault
The earthquake of November 4, 1927 was one of the most powerful shocks in southern California this century. Fortunately, it occurred in a reasonably spasely populated area, and some distance offshore, so damage was lighter than would be expected for a quake of such magnitude. In the area nearest the epicenter (the coastal area near the town of Surf), people were thrown from standing and reclining positions, a concrete highway was cracked, a railroad bridge was thrown out of line, and sand and water were fountained from the ground, leaving behind up to twenty "sand craters".??This earthquake also produced a sea-quake (compressional shock transmitted by water) and a seismic sea wave. The sea-quake was so violent it killed and stunned fish near Point Arguello and shook at least two ships in the area: the S.S. Socony and the Alaska Standard. Neither was seriously damaged, however.??The seismic sea wave (tsunami) produced by the shock was approximately 2 meters high at Surf and Pismo Beach and was recorded from La Jolla (near San Diego) to Fort Point (near San Francisco). The first wave was recorded as positive (not preceded by recession of water) at all the California coastal stations that noted it.?...?"
For USA Earthquakes in general see:
Why on earth would anyone locate a Nuclear power plant in California on the coast after seeing a map like this?