Volcano Map Legend

The sizes of symbols scale with earthquake magnitude, and their color with either the age of the earthquake or its depth, as shown in the legend below, and selected in the Control Panel. Clicking on an earthquake symbol shows its basic information and a link to a page with more details about the individual earthquake.


Control Panel

Volcano Map Panel

Using the tools in this panel you can control the earthquakes shown on the map. The minimum magnitude to plot is selected by the slider. The "Time" and "Depth" determines whether earthquake age or depth are used to color the symbol.

Show all magnitudes >

Custom Search


Instructions: Close
Please follow the steps below:
  • 1) To begin, click the "Draw" button
  • 2) Click a point on the map, this will be the left side of the cross-section.
  • 3)Click a second point on the map, this will be the right side of the cross-section.
  • 4) Drag square on line to include events to plot.
    • 5) Select plot type and depth constraint if any.
    • 6) Click "Plot"
A Km B

Last events 20 km from summit

Mag Time (Local) (UTC) Depth (Km) (Miles)
Description (Newberry)

Newberry is one of the largest Quaternary volcanoes in the United States, with a caldera that spans 6 to 8 km across. The center of the volcano is located about 35 km SE of Bend, OR.

Construction of the volcano began about 400,000 years ago; since that time it has erupted in a variety of styles ranging from basalt flows to far-reaching explosions of ash. A major explosion and collapse event about 75,000 years ago created Newberry's summit caldera. The caldera contains multiple hot springs, indicating that it is still hydrothermally active. These hot springs and multiple youthful lava flows indicate that the volcano could reawaken at any time.

More background information on Newberry

Background Seismicity

The Cascades Volcano Observatory and the PNSN cooperatively operate 8 seismometers in or near Newberry caldera. On average, we locate 0 earthquakes within 10 km of the volcano each decade.