Russian earthquake triggers tsunami warnings across the Pacific – what we know so far

An earthquake off the Russian peninsula of Kamchatka has triggered tsunami warnings in Japan, China, Hawaii, the US and central and Latin America.

The 8.8 magnitude earthquake occurred 12 miles below the surface of the water and around 80 miles southeast of the city of Petropavlovsk-Kamchatsky, northeastern Russia on Wednesday, according to the US Geological Survey.

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So far, it’s the most powerful on record since the 9.1 Japanese earthquake of 2011, which left more than 15,000 people dead, and the sixth strongest since records began.

Tsunamis have started to reach land in Japan and Hawaii, with urgent warnings being issued across the Pacific – from Asia to the US and Canada. Here’s what we know so far.

How did it start?

The earthquake struck at shallow depth 80 miles southeast of Petropavlovsk-Kamchatsky – a city of 165,000 people along the coast of Russia’s Avacha Bay, at around midday on Wednesday, local time (1am UK).

Waves were recorded of up to 4m (13ft) in Severo-Kurilsk on the Kuril Islands where a state of emergency has been declared.

Russia’s Tass news agency reported people running out into the streets, with balconies shaking, furniture and glass broken inside homes, and cars swaying on the street. Around 2,700 people were evacuated.

Electricity cuts were also reported across the peninsula.

Several people were injured and had to seek medical assistance, according to regional health minister Oleg Melnikov.

“Unfortunately, there are some people injured during the seismic event. Some were hurt while running outside, and one patient jumped out of a window. A woman was also injured inside the new airport terminal,” he said.

Where else have tsunamis hit so far?

Injuries have been reported in several countries, but there are no known deaths so far.

Beyond Russia, waves have started to reach Japan.

Two million people have been evacuated along the country’s Pacific coast, with evacuation advisories in place in more than 220 municipalities, according to the Fire and Disaster Management Agency. Nuclear power plants have also paused activity.

One caused waves of 60cm (2ft) on the island of Hokkaido and another reached 50cm (1.6ft) at Ishinomaki port in the north of the country. In northern Iwate, 40cm (1.3ft) waves were registered at Kuji port.

In Hawaii, people have been urged to seek higher ground after waves measured 1.82m (6ft).

Earthquake sirens blared in the streets, with beaches closed and coastal areas evacuated. Maui airport is closed and 200 people are sheltering inside, Hawaii Governor Josh Green added.

Although the waves have not yet been “of consequence”, Mr Green urged people to “lie low and watch TV” for further announcements.

In Alaska, 30cm (1ft) waves were observed in the communities of Amchitka and Adak, according to Dave Snider, tsunami warning coordinator.

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Where are the other warnings in place?

In China, the country’s tsunami warning centre has issued alerts for eastern coastal areas – particularly Shanghai and Zhejiang, which was already under alert from Typhoon CoMay, due to land on Wednesday.

States along the US West Coast have issued tsunami advisories, including Oregon, Washington State, and California.

Oregon’s Department of Emergency Management cautioned: “This is not a major tsunami, but dangerous currents and strong waves may pose a risk to those near the water.”

President Donald Trump posted on X: “A Tsunami Watch is in effect for Alaska and the Pacific Coast of the United States. Japan is also in the way. Please visit tsunami.gov/ for the latest information. STAY STRONG AND STAY SAFE!”

The Mexican Navy said that tsunami waves were due to hit Mexico’s northern coast at Ensenada near California, and could progress to Chiapas.

In New Zealand, the country’s disaster management agency issued warnings for coastal areas, which are likely to see “strong and unusual currents and unpredictable surges at shore”.

There is currently no need for official evacuation orders, it added, but people are being told to stay away from the coast.

The Pacific Island nations of Fiji, Samoa, Tonga, Micronesia, and the Solomon Islands have all issued warnings, as their low-lying topography puts them at particular risk.

What happens during a tsunami – and why are they so dangerous?

Tsunamis are a series of very long waves usually caused by an earthquake beneath the ocean’s surface. Although rare, they can also be triggered by landslides, volcanic activity, and sometimes by extreme weather above the ocean.

Unlike normal waves, which are driven by wind, tsunamis move through the entire ocean column – from the sea floor to the surface.

This means they can be incredibly powerful and fast – reaching plane-like speeds of around 500mph in the deepest parts of the ocean.

Their force means they can stretch across an entire ocean basin, impacting multiple countries. The 2004 Boxing Day tsunami caused damage in 17 nations.

Tsunamis become most dangerous when they reach land. The shallowness of the water sees the length of the waves decrease – but their height increase.

Tall waves can be very dangerous. It only requires six inches of water to knock someone off their feet and double that to sweep away a car.

Tsunami waves are also dangerous when they go back out to sea, carrying heavy debris with them.