Alaska 1964 Good Friday earthquake and tsunami damage.

Alaska 1964 Good Friday earthquake and tsunami damage.

Alaska 1964 Good Friday earthquake and tsunami damage.

Alaska 1964 Good Friday earthquake and tsunami damage.

Alaska 1964 Good Friday earthquake and tsunami damage.

Alaska 1964 Good Friday earthquake and tsunami damage.

Alaska 1964 Good Friday earthquake and tsunami damage.

Alaska 1964 Good Friday earthquake and tsunami damage.

Alaska 1964 Good Friday earthquake and tsunami damage.

Alaska 1964 Good Friday earthquake and tsunami damage.

Alaska 1964 Good Friday earthquake damage. Houses were swallowed in unconsolidated sediment.

Lituya Bay showing the giant wave path that swept trees off mountainsides up to an elevation of 1720 feet in the left center of the photo. This wave was caused by an earthquake and landslide July 9, 1958.

Lituya Bay showing the giant wave path that swept trees off mountainsides up to an elevation of 1720 feet in the left center of the photo. This wave was caused by an earthquake and landslide July 9, 1958.

Lituya Bay showing the giant wave path that swept trees off mountainsides up to an elevation of 1720 feet in the left center of the photo. This wave was caused by an earthquake and landslide July 9, 1958.

Manifestation of Hebgen Lake Earthquake also known as the Yellowstone Earthquake

Manifestation of Hebgen Lake Earthquake also known as the Yellowstone Earthquake

Manifestation of Hebgen Lake Earthquake also known as the Yellowstone Earthquake

Manifestation of Hebgen Lake Earthquake also known as the Yellowstone Earthquake . Quake Lake caused by the damming of the Madison River by a large landslide.

Dasht-i-Biaz Earthquake. Total destruction of village of Meiwhaj. Over 12000 people died in this earthquake.

Dasht-i-Biaz Earthquake. Total destruction of village of Meiwhaj. people died in this earthquake.

Dasht-i-Biaz Earthquake. 90% destruction of city of Kakh. Over 12000 people died in this earthquake.

Dasht-i-Biaz Earthquake. 90% destruction of city of Kakh. Over 12000 people died in this earthquake.

Unidentified earthquake damage image.

Unidentified earthquake damage image.

Unidentified earthquake damage image.

Unidentified earthquake damage image.

Unidentified earthquake damage image.

Unidentified earthquake damage image.

Unidentified earthquake damage image.

Unidentified earthquake damage image.

Unidentified earthquake damage image.

Unidentified earthquake damage image.

Earthquake damage

Earthquake damage

Olive View Hospital. San Fernando Valley Earthquake, California 1971.

Graphic of earthquake epicenter and damage to man-made structures.

Graphic of earthquake epicenter and damage to man-made structures.

Graphic of interior structure of Earth showing crust, mantle, core, and inner core.

Graphic of methodology to determine earthquake epicenter by using arc distances determined by analysis of seismograms

Graphic of raypaths of earthquake waves propagated through the Earth

Earthquake waves recorded on typical seismogram and paths of propagation through the Earth.

Graphic of tsunami warning system which was implemented and operated by the Coast and Geodetic Survey

World-wide network of standard seismograph stations managed by Coast and Geodetic Survey

Appears to be map of sunspot activity. Perhaps related to geomagnetic work.

Map of Earthquakes of the United States through 1963. Compiled by the Coast and Geodetic Survey

Map of Earthquakes 1966. Note correlation of oceanic earthquakes with mid-ocean ridge system.

Equipment at Coast and Geodetic Survey geophysical observatory

Equipment at Coast and Geodetic Survey geophysical observatory

Siesmograph equipment at Coast and Geodetic Survey geophysical observatory

Equipment at Coast and Geodetic Survey geophysical observatory