IMAGE - 3,288 m (10,786 ft) Mt. Baker Stratovolcano (Kulshan), 108 km east of Vancouver, Canada, 18 km south of the Canada / United States border. The United States Geological Service ranks it a VERY HIGH RISK...SMALL earthquake - 2015 Report Natural Resources Canada & District North Vancouver ~ a 30% chance of a M7.3 in Salish Sea bringing down 839 buildings...BIG earthquake - a M8.8 – M9.2 ~ repeatedly 41 times in the past 10,000 years.
886,757
views • Jul 30, 2020 • One of the largest earthquakes in United
States history happened here in 1857. Fly a small air plane over the
San Andreas Fault and learn about one of the most infamous earthquake
faults in the world. Follow along in my Grumman Tiger as we explore
the Carrizo Plain and see from a unique perspective how this deadly
earthquake fault has changed over thousands of years. The 1857
Fort Tejon earthquake measured 7.9 on the Richter scale.
California is long overdue for another "Big One" from this
massive fault. See an the UNCUT FLYOVER of the San Andreas fault
here: https://www.patreon.com/wolficorn
The gear I use:
The San
Andreas Fault is a continental transform fault that
extends roughly 810 miles through California. It forms the tectonic
boundary between the Pacific Plate and the North American Plate, and
its motion is right-lateral strike-slip (horizontal). The fault
divides into three segments, each with different characteristics and
a different degree of earthquake risk, the most
significant being the southern segment, which passes within about 35
miles of Los Angeles.
Recent studies of past earthquakes
indicate that there is a relationship (correlation) in time between
seismic events on the northern San Andreas Fault and the southern
part of the Cascadia
subduction zone (which stretches from Vancouver
Island to northern California). The San
Andreas Fault goes into the Pacific Ocean near San Francisco where it
links up (underwater) with the Cascadia Subduction Zone, in northern
California. Scientists believe quakes on the Cascadia
subduction zone may have triggered most of the major
quakes on the northern San Andreas within the past 3,000 years.
The evidence also shows the rupture direction going from north to
south in each of these time-correlated events. However the 1906 San
Francisco earthquake seems to have been the exception to this
correlation because the plate movement was moved mostly from south to
north and it was not preceded by a major quake in the Cascadia
zone.[11]
A study in 2006 concluded that the San Andreas fault has reached
a sufficient stress level for the next "big one", or a M ≥
7.0, to occur. It also concluded that the risk of a large earthquake
may be increasing more rapidly than researchers had previously
thought. The paper stated that, while the San Andreas Fault had
experienced massive earthquakes in the central (1857) and northern
(1906) segments, the southern section of the fault has not seen any
similar rupture for at least 300 years. Such an event would result in
substantial damage to Palm Springs and
other cities in San Bernardino, Riverside
and Imperial counties in California, and Mexicali
municipality in Baja California. It would be felt
throughout much of Southern California, including densely
populated areas of San Bernardino, Los Angeles,
Orange County, San Diego, Ensenada
and Tijuana, Baja California, San
LuisRio Colorado in Sonora and
Yuma, Arizona.
As both the public and
scientific community continue to speculate on the size of the next
earthquake to strike California, predicting major earthquakes with
sufficient precision to warrant taking increased precautions has long
been sought but remains elusive.[10] Nonetheless, the 2008
Uniform California Earthquake Rupture Forecast (UCERF) has
estimated that the probability of an M ≥
6.7 earthquake within the next 30 years on the northern and southern
segments of the San Andreas fault is somewhere between 21% and 59%,
respectively.
According to the new forecast, California
has a 99.7% chance of having a magnitude 6.7 or larger earthquake
during the next 30 years (see Figure
1). The likelihood of an even more powerful
quake of magnitude 7.5 or greater in the next 30 years is 46%.
Such a quake is more likely to occur in the southern half of the
state (37% chance in 30 years) than in the northern half (15% chance
in 30 years) (see Figure
2).
The
probability of a magnitude 6.7 or larger earthquake over the next 30
years striking the greater Los Angeles area is 67%, and in the San
Francisco Bay Area it is 63%, similar to previous Working
Group on California Earthquake Probabilities | WGCEPestimates (see Figure
3). For the entire California region, the fault
with the highest probability of generating at least one magnitude 6.7
quake or larger is the southern San Andreas (59% in the next 30
years; see Figure
4). For northern California, the most
likely source of such earthquakes is the Hayward-Rodgers Creek Fault
(31% in the next 30 years). Events of this size can be deadly,
as shown by the 1989 Loma Prieta earthquake (magnitude 6.9) and 1994
Northridge earthquake (magnitude 6.7).
Earthquake probabilities for many parts
of the state are similar to those in previous studies, but the new
probabilities calculated for the Elsinore and San Jacinto Faults in
southern California are about half those previously determined. For
the far northwestern part of the State, a major source of earthquakes
is the offshore 750-mile-long Cascadia Subduction Zone, the southern
part of which extends about 150 miles into California. For the next
30 years there is a 10% probability of a magnitude 8 to 9 quake
somewhere along that zone. Such quakes occur about once every 500
years on average.
Since
2013, I now do my personal photographic and videographic work in Hi-Definition
HD - 1080p.
Many of my followers, however, do not have an Hi Speed Internet
connection and the images may be pixilated
– see also Wikipedia example. Or, rasterised
(blurry). There are a few ways of overcoming the problem.
1. At the bottom
right of any YouTube video click on the gear icon and change the
quality of the image from HD 1080p, down to, say 144p, then try
increasing it slowly.
Both
the governments of Alberta
and British
Columbia have made commitments to place Hi Speed Internet
throught-out their respective provinces; as is the case in most all
of the other North American jurisdictions.
