A tiny city nicknamed a ‘tsunami magnet' saw the highest waves in continental US after the earthquake

Yahoo

6 days ago

A small Californian coastal city, notorious for its history of tsunamis, including one that claimed 11 lives over six decades ago, experienced minimal disruption on Wednesday, as residents quickly resumed their routines under clear skies.
Crescent City, often dubbed a "tsunami magnet," recorded waves of up to 1.22 metres (4 feet) early on Wednesday.
These were the highest observed anywhere in the continental United States following an 8.8-magnitude earthquake centred off Russia's Far East hours earlier. Crucially, these were significantly smaller than the devastating 6.40-metre (21-foot) waves that struck in 1964.
This time, the city of 6,600 reported no injuries and no significant flooding, with its downtown area reopening later that morning. While a dock at the city's harbour sustained damage, officials swiftly issued warnings for the public to avoid beaches and waterways.
'A lot of people who aren't from here did evacuate. But they ended up coming right back because nothing happened,' said Rose Renee, who works at Oceanfront Lodge that looks out at the famed Battery Point Lighthouse.
A surge of water lifted the dock off its pilings around 2:40 a.m., eventually submerging it, Harbormaster Mike Rademaker said at a news briefing. The dock was engineered to disrupt the waves' force before they reach the inner harbor and appears to have functioned as intended, he said.
Crescent City is highly susceptible to tsunamis because of an underwater ridge, just offshore, known as the Mendocino Fracture Zone. The ridge funnels tsunamis into deeper water where they pick up speed before they hit the town. Forty-one tsunamis have been observed or recorded since the first tide gauge was installed in Crescent City in 1933.
The oral history of local native peoples, geologic evidence and the written records of people elsewhere in the Pacific Rim suggest that tsunamis have battered this shoreline for centuries, according to city records.
The 1964 event, considered the worst tsunami disaster recorded in the United States, began with a 9.2 magnitude earthquake in Alaska, according to the Crescent City website. Three small waves caused little damage, but then a big wave — nearly 21 feet (6.40 meters) — devastated 29 city blocks.
The quake caused 15 deaths, and the ensuing tsunami caused 124 deaths: 106 in Alaska, 13 in California and 5 in Oregon, according to the National Oceanic and Atmospheric Administration's National Centers for Environmental Information.
Crescent City rebuilt downtown, and today a walking tour highlights high-water marks posted on surviving buildings, objects pushed by waves and memorials to those who died.
A tsunami caused by the March 2011 earthquake in Japan killed one person in Crescent City and damaged the harbor.
Max Blair, a volunteer at the Del Norte Historical Society, which manages the town's museum and historic lighthouse, said locals have tsunami drills at least once a year. When there is danger of one, cellphone notifications go out and the tsunami sirens in the town sound warnings. Resident then turn to KCRE radio for information, Blair said.
If ordered to evacuate, people move to higher ground, normally the town's Walmart about 2 miles (3.22 kilometers) from the shore.
'We evacuate if it's forecast to be a big wave. But the first wave was coming in at low tide and it was only a couple feet, so we just have to stay away from the beach,' Blair said.
The city's website warns that a tsunami could happen anytime. Since most of downtown is in the tsunami run-up zone, if there were a near-shore earthquake, people would only have minutes to reach safety. Thirty-two tsunamis have been observed in the city since 1933, including five that caused damage.
It is still not safe to head to the beach
The greatest impact from the tsunami event along the coast Wednesday morning was around Crescent City with strong tidal swings, including up to 4-foot waves, according to James White, a meteorologist at the National Weather Service's Eureka office.
Officials stressed that conditions may be improving, but it wasn't yet safe to head to the beach on Wednesday. There were still dramatic tide fluctuations that must carry high currents, the city manager said.
'It seems like whenever we have these events, it's also time that we lose someone just because they're in the wrong place and they get caught off-guard, and then they're swept out,' Weir said.