A spike in earthquakes at Mount Adams, a volcano in Washington state, prompted scientists to install additional monitoring instruments to assess the seismic activity.

The recent earthquakes have been small — ranging from magnitudes of 0.9 to 2.0 — but the federal government has only one seismometer in the vicinity of Mount Adams, the second-tallest volcano ...

The volcano formed around 520,000 years ago. The largest cone grew during three eruptive episodes — 500,000, 400,000 and 50,000 to 30,000 years ago — and is surrounded by several smaller vents.

A normally quiet “high threat” volcano in Washington state has been shaking at a record rate — prompting an alert from geologists who ultimately said there’s little chance it will erupt soon.

There’s been some unusual rumblings coming from Mount Adams, but for those in the area, it’s not time to panic. Geologists are closely monitoring Washington’s largest volcano (and second ...

The second-tallest volcano in Washington had six recorded earthquakes, ranging from magnitude 0.9 to 2.0. Typically, earthquakes there happen once every 2-3 years.

Washington volcano sees surge in earthquakes Spike O’Neill noted there were nine events registering between 0.9 and 2.0 on the volcano in September, and usually, there is only one every three years.

Scientists have been left baffled by a record spike in earthquakes near Washington's Mount Adams that has been dormant for thousands of years.. The volcano is deemed a 'high threat' due to its ...

Mount Adams is the largest active volcano in Washington state. (Image credit: Google Earth) It last erupted at some point between 3,800 and 7,600 years ago, according to USGS .

The second-tallest volcano in Washington had six recorded earthquakes, ranging from magnitude 0.9 to 2.0. Typically, earthquakes there happen once every 2-3 years.