State officials say the risk of flooding caused by major tsunamis is likely to be greater than many people who are aware of on California’s famous coastline, further enhancing the need for attention residents when they live or visit the Hazard area.
The California Geological Remotie published and reviewed the latest risk assessment from Times, outlining the map, which illustrates the potential damage that a scenario considered extreme but realistic. For example, a large tsunami may flood stripe Marina del Rey, Long Beach and the nearby twin-port complex have an elevation of up to 15 feet.
The worst tsunami could cause huge flooding to floods area Oakland, Berkeley and Alameda have sea levels up to 18 feet.
Floods may arrival Average climax, up to average climax, towards 50 feet along the outer coast of Humboldt Bay and Eureka Crescent City and cayucos.
But for most Californians, the exact range of tsunami risks is less important than knowing the existence of these dangerous areas first. this Amplitude 7 earthquake On December 5, Humboldt County Coast issued a tsunami warning in northern Northern California, which caused a warning about the tsunami, which was a huge reminder.
If an important tsunami is achieved, it will be only a few minutes to make the difference. On the North Coast of California, some people may have only 10 minutes After a huge earthquake occurred at sea, it arrived at the evacuation area.
“Damage tsunamis rarely happen in California, but they do happen if you live or visit the coast. You need to be aware of this potential dangerSteve Bohlen, director of the California Geological Survey at the time, said the updated map of the tsunami hazard area was released.
To see if you live in a tsunami hazardous area, visit keservation.ca.gov/cgs/tsunami/maps.
The latest map was published between 2020 and 2022. Although other news events have attracted attention during this period, they are still worth noting – containing some major updates from the early tsunami flooding map, which predated a decade or more.
and the state’s annual Tsunami Preparation Week Officials said it will begin Saturday and it is crucial for residents to familiarize themselves with local risks.
The latest news about California tsunami danger zone is devastating Japan’s 2011 tsunamithis is by Amplitude 9.1 The earthquake strayed from the country’s east coast.
Before the disaster, Japan relied on hundreds of years of recorded data to estimate the risk of the tsunami, which is once “It seems reasonable,” Bohlen said. But the disaster shows that scientists need to consider more rare events – tsunamis may be every 1,000 years or so.
As a result, California chose to take a “very conservative approach” to its maps, “hopefully avoiding the tragic deaths experienced in Japan,” Boren said in a previous statement.
In many cases, California can get hours of lead time before a devastating tsunami. But if the earthquake hits near the shore, there is little warning except for the tremor itself.
“The most important thing is if you are near the coast, feel strongly shaking from a local earthquake, or get official notification to evacuate the inland, move inland as soon as possible,” Rick Wilson, a senior engineering geologist at the California Geological Survey’s Senior Geological Survey Department, said in a 2021 statement in 2021.
exist Latest updates to the mappotential tsunami flooding areas have been expanded in part of the Long Beach, including Ocean Boulevard and Belmont Coast – Malibu, Santa Monica, Venice, Marina del Rey, Hermosa Beach, Redondo Beach and San Pedro.
Highlights in Los Angeles County include Marina del Rey, Long Beach and the Port of Los Angeles and around Alamitos Bay, as evacuation roads are scarce, according to the California Geological Survey.
In extreme cases, flooding “flooded almost all the land in the port and some surrounding communities” in extreme cases, Wilson said.
When updating the map, San Francisco It was also seen that the “significant increase in mapping tsunami hazards” in the financial district at the foot of Market Street and parts of the North Beach south of Embarcadero. This area includes the Embarcadero Bart and Muni stations as well as the Embarcadero Center.
“The land altitude in both areas may be affected by smaller seashore flooding,” the Geological Survey Agency explain.
In many places, the risk map changes relatively modestly. Some – for example at Newport Beach – Extended To add a small buffer outside the flooded area modeled by a road or landmark to help local officials communicate evacuation plans, the Geological Survey Bureau explain.
“There are some places on the west coast of the United States and Alaska, and the entire area has safely evacuated the nearshore activities… [have] The success rate is much lower,” said Dave Snider, tsunami warning coordinator at the Alaska National Tsunami Warning Center. “This is the number one reason people need to know their danger zones in advance.
Changes are two-way. Some areas, such as Huntington Beach and Bolsa Chica, saw their tsunami hazards shrink. New analysis suggests that dams and ponds will help protect the public better than originally thought.
With the widespread warning in December, it is obvious that many Californians don’t know where the tsunami warning area is.
And, as the map shows, coastal areas are not always exposed areas. According to the California Geological Survey, the tsunami hazard zone can extend to the Bayid and Riverside areas, relatively far from the Pacific coast, representing the largest submerged area in many cases.
California’s tsunami hazard zone is vast in some areas, including some of the state’s most expensive real estate and most famous destinations: Santa Monica Pier, Naples Island in Long Beach, Balboa Island and Balboa Peninsula at Newport Beach; and neighborhoods of Sunset Beach, Seal Beach, San Diego and nearby Coronado.
Popular tourist hotspots from Malibu to Santa Barbara also have potential risks. Some of San Francisco’s most famous parts, including parts of the financial district, as well as the Ferry Building, Fisherman’s Wharf, the Palace of Fine Arts, Chase Center, Oracle Park and Treasure Island – may see flooding of a large tsunami.
The same goes for most parts of Alameda. large blocks of Oakland, Berkeley, Richmond and Marin County; and certain areas in and around Silicon Valley, including Redwood City and the northern areas of Berlinger.
In the south, some coastal communities along the San Mateo County Highway 1 are in tsunami hazard areas (such as part of Pacifica and Half Moon Bay), just like other popular tourist destinations in more southern counties such as Capitola and Monterey.
The risk also extends northward. The tsunami in Humboldt and Delbei counties is very risky. Eureka is surrounded by vast areas, next to Humboldt Bay, which has a longer lean peninsula that could make evacuation challenges.
In Ventura County, part of Ventura, Oxnard and Port Hueneme is located in tsunami hazard zones, including Oxnard Shores and Ventura Keys, as well as Ventura Quay Mobile Family Park.
Given the extent to which the hazardous area is assessed, large-scale evacuation can be ordered and guaranteed in case of limited time and information.
That’s the case in December. Although the warning was later cancelled and there was no massive tsunami development, Sneijder said it was still a good reminder that such a disaster could happen and people need to be prepared.
Technically, in Arena Cove in Mendocino County, there is a tsunami – although measured in 5 cm.
California’s nightmare scene will be a tsunami caused by an underwater earthquake near the coast. This is a particularly chilling prospect for Northern California, Oregon and Washington, and will be a magnitude 9 earthquake in the coastal Cascadia subduction zone.
The major earthquake in the area could bring the tsunami to San Francisco in just one hour. According to city documents, a close breakdown along Reyes’s huge force’s fault could lead to a tsunami that hit the city in just 10 minutes.
“You’ve just experienced a major alarm, which probably won’t happen to you again,” Snider said. “But if it does…ask yourself, will there be an alarm when I need it?”
It is important to remember that tsunamis are not like typical waves. They are a series of waves that reach the shore almost like turbulent water or rapidly rising floods.
Perhaps in California, there is no better way to prove the risk of a tsunami than Crescent City. Most notably, the 1964 Alaska earthquake triggered a catastrophic tsunami Destroy the citywash 29 blocks and kill at least 11 people. Surfing reached 21 feet above the average low tide.
The hypothetical magnitude is 9.3. The earthquake near the Aleutian Islands in eastern Alaska could bring harmful tsunamis to the San Francisco Bay Area in about five hours, about six hours.
If you are going up hills or inland from a mapped hazardous area, you should be protected from tsunamis. But those living, working or rebuilding in dangerous areas should have an evacuation plan, especially since authorities may have only a few minutes to decide whether to order everyone to order higher ground.
Officials say if you don’t know if you’re in a tsunami hazardous area and there are no maps or evacuation signs available, the goal is to be at an altitude of 100 feet, two miles from the shoreline, officials said.
Officials say it’s important to know if you are, too no In tsunami hazard areas, avoid evacuation and complications for those who need to move. For example, when most of the city is in a safe area, there is no need to escape from San Francisco – it may only take a few blocks to walk inland.
If evacuation is impossible, your last resort may enter the third or higher floor of a solid building, or even Climbing a tree.
Evacuation from Santa Monica Pier does not mean you need to head to the top of Mount Baldy. Just crossing the nearby cliff is enough.
But even in relatively narrow areas of tsunami hazard zones, many Californians may not have the instinct to enter higher ground after shaking the ground.
The risks may vary. The tsunami hazard area of Manhattan Beach is essentially limited to beaches and marinas along the chain, a walking path that separates sand from luxury homes. However, in Hermosa Beach, the latest expanded tsunami hazard zone now also covers expensive houses, around the east of the trail.
Visit the Sea World of San Diego? The theme parks are outside the dangerous areas, but some hotels and job seekers in the west and north do not.
Sneider said those ordered to leave during the broad warning in December should assess whether their evacuation plans are effective and whether adjustments or ironing measures are required.
