Earthquake Magnitude Scale Magnitude Earthquake Effects Estimated Number Each Year 2.5 or less Usually not felt, but can be recorded by seismograph. Millions 2.5 to 5.4 Often felt, but only causes ...

There are a number of ways to measure the magnitude of an earthquake. Most scales are based on the amplitude of seismic waves recorded on seismometers. These scales account for the distance between ...

PORTLAND Ore. (KPTV) - A magnitude 5.0 earthquake hit off the Oregon coast on Thursday evening. The quake was recorded at 4:58 p.m. about 75 miles from Coos Bay, the United States Geological ...

COOS BAY Ore. (KPTV) - On Wednesday a 6.1 magnitude earthquake was recorded off the coast of Oregon in the Pacific Ocean. The U.S. Geological Survey (USGS) reported it happened 180 miles west of ...

PORTLAND, Ore. (KOIN) – Feel a rumble on the Oregon Coast? That’s because a Magnitude 5 earthquake hit early Friday morning, according to the United States Geological Survey. The USGS reported ...

A magnitude 4.0 earthquake rattled the Ontario area Sunday morning, jolting some residents awake. This comes just 5 days ...

A powerful 6.0-magnitude earthquake rattled the coast of Oregon Wednesday afternoon, according to officials. The quake struck about 180 miles from Coos Bay around 1:15 p.m. local time, the US ...

A powerful 7.6-magnitude earthquake prompted panic in the Philippines, evacuations in Japan and tsunami concerns that quickly eased. The earthquake near the southern Philippines island of Mindanao ...

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A strong, 6.2-magnitude earthquake struck in the North Pacific Ocean near Costa Rica on Saturday, according to the United States Geological Survey. The temblor happened at 1:43 p.m. Eastern about ...

Yesterday, a strong earthquake shook the province of Guanacaste at about 11:43 a.m. The Volcanological and Seismological Observatory of Costa Rica (OVSICORI) reported that the earthquake had a ...

A magnitude 5.0 earthquake struck off the Oregon coast Thursday at 4:58 p.m. The temblor happened in the Pacific Ocean, about 75 miles from Coos Bay, the United States Geological Survey reported.