Univ. of Calif. Seismologist Tom Turcotte plots magnitude on seismograph telemetered from Mt. Hamilton, Calif., on earthquake that hit around Anchorage, Alaska, 3/27. Dark lines running horizontally shown seismograph when running normal. Pencil points to where line breaks off when quake hit causing needle to jump to great magnitudes as it continues across the graph.
Univ. of Calif. Seismologist Tom Turcotte plots magnitude on seismograph telemetered from Mt. Hamilton, Calif., on earthquake that hit around Anchorage, Alaska, 3/27. Dark lines running horizontally shown seismograph when running normal. Pencil points to where line breaks off when quake hit causing needle to jump to great magnitudes as it continues across the graph.
Univ. of Calif. Seismologist Tom Turcotte plots magnitude on seismograph telemetered from Mt. Hamilton, Calif., on earthquake that hit around Anchorage, Alaska, 3/27. Dark lines running horizontally shown seismograph when running normal. Pencil points to where line breaks off when quake hit causing needle to jump to great magnitudes as it continues across the graph.
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[Information from item housing] Earthquake Alaska 1964