Tsunami advisory issued for West Coast after underwater volcano erupti…

A tsunami advisory was in effect for the Southern California coast Saturday morning after a volcano erupted near the Pacific nation of Tonga.

According to the National Weather Service in Los Angeles County, a tsunami advisory is in effect for county beaches, with initial groups are expected around 7:45 a.m. However, there were no meaningful concerns about inundation and the main concerns were over strong rip current, the agency said.

L.A. County officials said residents living within a tsunami advisory area should do the following:

  • Move out of the water, off the beach, and away from harbors, marinas, breakwaters, bays and inlets.
  • Do not go to the shore to observe the tsunami.
  • Do not return to the coast until local emergency officials indicate it is safe.

In Orange County, the first groups are expected to hit at approximately 7:55 a.m. In a press release Saturday, officials announced the closure of all Orange County beaches, harbors and docks until further notice.

“Although no meaningful coastal flooding is expected, some areas could experience dangerous currents and tidal surges due to this tsunami along beaches and in harbors and marinas,” the Orange County Sheriff’s Department said in a news release. “The impact of this tsunami will be stronger than normal currents and possible higher than normal tidal surges along the beaches.”

In Berkeley, officials closed the city’s marina and urged people to seek higher ground. The Berkeley Fire Department issued a mandatory evacuation for the marina area as 2- to 3-foot groups were expected to arrive at about 7:30 a.m.

Meanwhile, there were no immediate reports of injuries or the extent of the damage as communications with the small island nation remained cut off hours after the eruption.

In Hawaii, the Pacific Tsunami Warning Center reported groups slamming ashore from half a meter (a foot) in Nawiliwili, Kauai, to 80 centimeters (2.7 feet) in Hanalei. “We are relieved that there is no reported damage and only minor flooding throughout the islands,” the center said, describing the situation in Hawaii.

On Tonga, video posted to social media showed large groups washing ashore in coastal areas, swirling around homes and buildings.

New Zealand’s military said it was monitoring the situation and remained on standby, ready to assist if asked.

Satellite images showed a huge eruption, a plume of ash, steam and gas rising like a mushroom above the blue Pacific waters.

The Tonga Meteorological sets said a tsunami warning was declared for all of the archipelago, and data from the Pacific tsunami center showed groups of 80 centimeters (2.7 feet) had been detected.

In Hawaii, Alaska and along the U.S. Pacific coast, residents were asked to move away from the coastline to higher ground and pay attention to specific instructions from their local emergency management officials, said Dave Snider, tsunami warning coordinator for the National Tsunami Warning Center in Palmer, Alaska.

“We don’t issue an advisory for this length of coastline as we’ve done — I’m not sure when the last time was — but it really isn’t an everyday experience,” he said. “I hope that elevates the importance and severity for our citizens.”

According to the National Weather Service, a tsunami advisory method a dangerous wave is on the way. “Strong and uncommon currents are expected along the coast, and in bays, marinas, and harbors,” the agency said. “Move to high ground and away from the shore.”

He said the groups already slamming ashore in Hawaii were just under the criteria for a more serious tsunami warning, with measurements at 80 centimeters (2.7 feet) in Hanalei and Maui. groups of about 91 centimeters (3 feet) or above would cause a warning. Snider said they’re currently expecting groups of 30 centimeters (1 foot) to 61 centimeters (2 feet) along the Pacific coast.

Snider said residents in these areas should expect groups and strong and uncommon currents for many hours and there could be some low areas that are overwhelmed, such as marinas and harbors.

“The important thing here is the first wave may not be the largest. We could see this play out for several hours,” he additional. “It looks like everything will stay below the warning level but it’s difficult to predict because this is a volcanic eruption and we’re set up to measure earthquake or seismic-pushed sea groups.”

Residents of American Samoa were alerted of the tsunami warning by local broadcasters in addition as church bells that rang territory-wide. An outdoor siren warning system was out of service. Those living along the shoreline quickly moved to higher ground.

As night fell, there were no reports of any damage and the Hawaii-based tsunami center canceled the alert.

Authorities in the nearby island nations of Fiji and Samoa also issued warnings, telling people to avoid the shoreline due to strong currents and dangerous groups. The Japan Meteorological Agency said there may be a slight swelling of the water along the Japanese coasts, but it was not expected to cause any damage.

The Islands Business news site reported that a convoy of police and military troops evacuated Tonga’s King Tupou VI from his palace near the shore. He was among the many residents who headed for higher ground.

The explosion of the Hunga Tonga Hunga Ha’apai volcano was the latest in a series of spectacular eruptions.

A Twitter user identified as Dr. Faka’iloatonga Taumoefolau posted video showing groups crashing ashore.

“Can literally hear the volcano eruption, sounds pretty violent,” he wrote, adding in a later post: “Raining ash and tiny pebbles, darkness blanketing the sky.”

Earlier, the Matangi Tonga news site reported that scientists observed enormous explosions, thunder and lightning near the volcano after it started erupting early Friday. Satellite images showed a 5-kilometer (3 mile) -wide plume rising into the air to about 20 kilometers (12 miles).

More than 2,300 kilometers (1,400 miles) away in New Zealand, officials were warning of storm surges from the eruption.

The National Emergency Management Agency said some parts of New Zealand could expect “strong and uncommon currents and unpredictable surges at the shore following a large volcanic eruption.”

The volcano is located about 64 kilometers (40 miles) north of the capital, Nuku’alofa. Back in late 2014 and early 2015, a series of eruptions in the area produced a small new island and disrupted international air travel to the Pacific archipelago for several days.

Tonga is home to about 105,000 people.

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