(Reuters) - A powerful earthquake of magnitude 7.8 off Russia’s Kamchatka Peninsula triggered a tsunami warning but the threat has now passed, the U.S. Geological Survey and U.S. Pacific Tsunami Center said.

The quake struck at 11:34 a.m. on Tuesday (2334 GMT on Monday) some 125 miles (200 km) from the city of Nikolskoye on Bering island off the Kamchatka Peninsula. The epicenter was west of Attu, the westernmost and largest island in the Near Islands group of Alaska’s remote Aleutian Islands.

The earthquake was very shallow, only 6 miles (10 km) below the seabed, which would have amplified its effect, but it was far from any mainland and there were no immediate reports of any casualties or damage.

The Kamchatka branch of Russia’s emergency situations ministry had warned that waves up to 50 cm (1-2/2 feet) high could reach Nikolskoye.

The U.S. Pacific Tsunami Warning Center had warned earlier that “hazardous tsunami waves were possible for coasts within 300 km (186 miles) of the earthquake epicenter.” But it later said that based on all available data the tsunami threat from this earthquake had passed.

The quake was initially reported as a magnitude 7.7 before being revised down to 7.4 and finally upgraded to 7.8, a major quake normally capable of causing widespread and heavy damage when striking on or near land.

The quake was followed by numerous aftershocks, including several above magnitude 5.0.</s></s>ANCHORAGE, Alaska (AP) — A strong earthquake on the Russian side of the Bering Sea briefly prompted a tsunami advisory for parts of the Pacific, including Alaska’s remote Aleutian Islands and Russia. The National Tsunami Warning Center in Palmer, Alaska, canceled the advisory because the tsunami no longer posed a threat.

Officials at the warning center had cautioned waves could reach up to 3 feet (0.91 meters) above the tide level. But waves later Monday were reported only 6 inches above tide at the sparsely populated Shemya, Alaska, site of a remote Air Force station in the extreme western Aleutians.

The quake was initially measured at magnitude 7.4 when it struck just after 3:30 p.m. AKDT in the Komandorskiye Ostrova region of Russian, roughly 1,400 miles (2,253 kilometers) east of Anchorage.</s>A tsunami warning has been issued for Alaska's Aleutian Islands after a powerful 7.4 magnitude earthquake hit the Bering Sea between the US and Russia.

The earthquake struck between the tip of the Aleutian Islands and Russia's Kamchatkaat 1.34 on Tuesday local time , according to the US Geological Survey.

The U.S. Pacific Tsunami Warning Center said 'hazardous tsunami waves were possible for coasts within 186 miles of the earthquake epicentre.'

The earthquake struck some 125 miles from the city of Nikol'skoye on Bering island off the Kamchatka Peninsula.

The epicentre was west of Attu, the westernmost and largest island in the Near Islands group of Alaska's remote Aleutian Islands.

The earthquake was very shallow, only 6 miles below the seabed, which would have amplified its effect, but it was far from any mainland.

Tsunami waves, however, were unlikely to reach Kamchatka's eastern coast, some 310 miles away.

The quake was initially reported as a magnitude 7.7 before being revised down to 7.4 and finally upgraded to 7.8, a major quake normally capable of causing widespread and heavy damage when striking on or near land.

The quake was followed by several aftershocks, including a couple above magnitude 5.0.</s>A powerful quake of magnitude 7.4 struck in the northern Pacific Ocean between the tip of Alaska’s Aleutian Islands and Russia’s Kamchatka Peninsula, the U.S. Geological Survey said on Monday.

A powerful quake of magnitude 7.4 struck in the northern Pacific Ocean between the tip of Alaska’s Aleutian Islands and Russia’s Kamchatka Peninsula, the U.S. Geological Survey said Monday.

The quake struck at 1:34 a.m. Tuesday some 125 miles from the city of Nikol’skoye on Bering island off the Kamchatka Peninsula. The epicenter was west of Attu, the westernmost and largest island in the Near Islands group of Alaska’s remote Aleutian Islands.

The earthquake, initially reported as a magnitude 7.7, was very shallow — only 7.4 miles below the seabed, which would have amplified its effect, but it was quite far from any mainland.

The U.S. Pacific Tsunami Warning Center said “hazardous tsunami waves are possible for coasts located within 186 miles of the earthquake epicenter.”

Tsunami waves, however, were unlikely to reach Kamchatka’s eastern coast, some 310 miles away.

The quake was followed by several aftershocks, including a couple above magnitude 5.0.</s>(Reuters) - A powerful earthquake of magnitude 7.8 struck in the northern Pacific Ocean between the tip of Alaska's Aleutian Islands and Russia's Kamchatka Peninsula, the U.S. Geological Survey said on Monday.

The quake struck at 11:34 a.m. on Tuesday (2334 GMT on Monday) some 125 miles (200 km) from the city of Nikol'skoye on Bering island off the Kamchatka Peninsula. The epicenter was west of Attu, the westernmost and largest island in the Near Islands group of Alaska's remote Aleutian Islands.

The earthquake was very shallow, only 6 miles (10 km) below the seabed, which would have amplified its effect, but it was far from any mainland.

The U.S. Pacific Tsunami Warning Center said "hazardous

tsunami waves were possible for coasts within 300 km (186 miles) of the earthquake epicenter."

Tsunami waves, however, were unlikely to reach Kamchatka's eastern coast, some 500 km (310 miles) away.

The quake was initially reported as a magnitude 7.7 before being revised down to 7.4 and finally upgraded to 7.8, a major quake normally capable of causing widespread and heavy damage when striking on or near land.

The quake was followed by several aftershocks, including a couple above magnitude 5.0.</s>KAMCHATKA (REUTERS, AFP) - A powerful quake of magnitude 7.8 struck in the northern Pacific Ocean between the tip of Alaska's Aleutian Islands and Russia's Kamchatka Peninsula, the US Geological Survey said on Monday.

The quake struck at 1:34 a.m. on Tuesday (at 2334 GMT on Monday) some 125 miles (200 km) from the city of Nikol'skoye on Bering island off the Kamchatka Peninsula. The epicenter was west of Attu, the westernmost and largest island in the Near Islands group of Alaska's remote Aleutian Islands.

Waves were forecast to be less than 0.3 meters above the tide level for coasts in an area ranging from Russia to Hawaii, the Pacific Tsunami Warning Center said.

The earthquake, initially reported as a magnitude 7.7, was very shallow - only 10 km below the seabed, which would have amplified its effect, but it was quite far from any mainland.

The quake was initially reported as a magnitude 7.7 before being revised down to 7.4 and finally upgraded to 7.8, a major quake normally capable of causing widespread and heavy damage when striking on or near land.

The quake was followed by several aftershocks, including a couple above magnitude 5.0.</s>A powerful earthquake of magnitude 7.8 hit off Russia's Kamchatka Peninsula and triggered a tsunami warning, but the threat soon passed, the U.S. earthquake monitoring agencies said early on July 18.

The quake struck about 200 kilometers from the city of Nikolskoye on Bering Island off the Kamchatka Peninsula. The epicenter was west of Attu, an island in Alaska's Aleutian chain.

The earthquake was very shallow, only 10 kilometers below the seabed, which amplified its effect, but it was far from any inhabited areas and there were no immediate reports of any casualties or damage.

The Kamchatka Emergencies Ministry warned that waves up to 50 centimenters high could reach Nikolskoye. But the tsunami threat quickly passed.

A 7.8 magnitude temblor is a major quake capable of causing widespread and heavy damage when striking on or near land.

The quake was followed by numerous aftershocks, including several above magnitude 5.0.

Based on reporting by Reuters, AP, and TASS</s>A powerful quake of magnitude 7.4 struck in the northern Pacific Ocean between the tip of Alaska's Aleutian Islands and Russia's Kamchatka Peninsula, the US Geological Survey said on Monday.

The quake struck at 1:34 a.m. on Tuesday some 125 miles from the city of Nikol'skoye on Bering island off the Kamchatka Peninsula. The epicenter was west of Attu, the westernmost and largest island in the Near Islands group of Alaska's remote Aleutian Islands.

The earthquake, initially reported as a magnitude 7.7, was very shallow — only 7.4 miles below the seabed, which would have amplified its effect, but it was quite far from any mainland.

The US Pacific Tsunami Warning Center said "hazardous tsunami waves are possible for coasts located within 300 km (186 miles) of the earthquake epicenter."

Tsunami waves, however, were unlikely to reach Kamchatka's eastern coast, some 310 miles away.

The quake was followed by several aftershocks, including a couple above magnitude 5.0.</s>A 7.8 magnitude earthquake rocked the eastern coast of Russia on Tuesday forcing authorities to issue a tsunami threat in parts of the Pacific. However, the tsunami threat has now passed, the United States Geological Survey (USGS) and the US Pacific Tsunami Center said.

The quake, which struck at a depth of 11.7 km at 23:34 GMT, hit 199 kilometres east-southeast of Nikol'skyoe in Russia, USGS said. Waves were forecast at less than 0.3 metres to a foot above the tide level for coasts in an area ranging from Russia to Hawaii, the US Pacific Tsunami Warning Center said.

"Based on preliminary earthquake parameters... hazardous tsunami waves are possible for coasts located within 300 km (186 miles) of the earthquake epicentre," the US Pacific Tsunami Warning Center said. However, it later said that the available data suggested the tsunami threat had passed.

The quake occurred on Bering Island off the coast of Kamchatka Peninsula in Russia. The epicentre was west of Attu, the westernmost and largest island in the Near Islands group of Alaska's remote the Aleutian Islands, Reuters reported. It was initially said to be a 7.7 magnitude quake on the Richter scale before being revised to 7.4 magnitude and then finally being increased to 7.8 magnitude.

The US Pacific Tsunami Warning Center said that the earthquake was shallow and that there were no reports of any casualties or injuries or damage to property as it occurred extremely far from the mainland.

The quake was followed by several aftershocks, a couple of them being above 5.0 magnitude.
A 7.7 magnitude earthquake strikes off Russia's Kamchatka Peninsula, west of the Alaskan Aleutian Island of Attu, in the North Pacific Ocean. No immediate reports of casualties or damage; a tsunami warning was cancelled.