California
Related: About this forumSan Andreas fault is about to crack – here's what will happen when it does
http://www.upi.com/Top_News/Opinion/2016/05/11/San-Andreas-fault-is-about-to-crack-heres-what-will-happen-when-it-does/6741462974519/Of course, the reiteration of the seismic hazard to Californians will be nothing surprising, but what is new is the warning that the southern portion of the fault "looks like it's locked, loaded and ready to go."
Why is this eminent seismologist making these alarming statements? Well, the fact is that there has not been a major release of stresses in the southern portion of the San Andreas fault system since 1857. In simple terms, the San Andreas is one of many fault systems roughly marking the border between the Pacific and North American tectonic plates. Both plates are moving in an approximately northerly direction, but the Pacific plate is moving faster than its North American counterpart, meaning that stresses between the plates are constantly building up.
In 1906, some of these stresses were catastrophically released in the San Francisco Bay area in a 7.8 magnitude event and again, in northern California, during the 6.9 magnitude 1989 Loma Prieta earthquake. Events of these magnitudes, however, have not occurred along the San Andreas fault in the south of the state the 1994 Northridge event was associated with a nearby, but separate, fault system leading to the suggestion that one is imminent and, given the amount of stress that might actually have accumulated, when it arrives it will be the "Big One."
MattP
(3,304 posts)And everybody would say the big one is going to hit any day now. The building next door to me fell down during the Landers quake.
thereismore
(13,326 posts)KamaAina
(78,249 posts)The concern is for the southern section, which hasn't gone off since 1857 and runs right, and I mean right above San Bernardino.
Protalker
(418 posts)I love to visit my friends 23rd floor overlooking the Bay. All life involves risk. Live for today.
KamaAina
(78,249 posts)Don't know if there are any local faults down there like L.A. and the East Bay have, though. The main hazard in SD seems to be wildfire.
Protalker
(418 posts)in southern riverside county, has the lake elsinore fault line, and is fairy close to sandy eggo.
Lordquinton
(7,886 posts)Immediately means anywhere between now and 1000 years (or more).
Just like any Californian, have the earthquake kit prepared and up to date.
Galileo126
(2,016 posts)and I live just 1.5 miles from the fault. All we've been getting is 1-2 mag range microquakes.
A couple of 5.0's would help some... or not?
hvn_nbr_2
(6,490 posts)Since the scale is logarithmic, it would take 10X 5.0 quakes to release the stress of one 6.0, and 100X 5.0's to release the stress of one 7.0.
Retrograde
(10,173 posts)Some months before Loma Prieta we had a number of smaller quakes. Very little damage, but as a result I did bolt the bookcases to the wall, and made sure nothing breakable was near the bed. It's just been too quiet in the Bay Area, and with the new influx of residents who've never experienced a big enough quake and don't know what precautions they can take to reduce damage I'm afraid that when we do get a largish one it will be worse due to lack of preparation.
LeftyMom
(49,212 posts)*except an attempted Presidential assassination, an SLA bank robbery, the occasional serial murder, more than our fair share of hostage situations, innumerable catastrophic floods, and that Cake cover of War Pigs. But no earthquakes.
yuiyoshida
(41,868 posts)That mean's a tsunami, maybe similar to what Japan faced.
KamaAina
(78,249 posts)The 1906 quake's epicenter was actually just off SF.
yuiyoshida
(41,868 posts)KamaAina
(78,249 posts)yuiyoshida
(41,868 posts)1.) Northern San Gregorio
2.) San Andreas Santa Cruz
3.) San Andreas Northern Golden Gate
Brother Buzz
(36,488 posts)It's those underwater upthrusting faults that will get you
hunter
(38,340 posts)Land sliding under the ocean can make big waves.
Such landslides can be spontaneous or initiated by earthquakes.
Brother Buzz
(36,488 posts)The Storegga slide, the granddaddy of all slides, comes to mind