Notable Earthquake of the Week
Ka'u District, Hawaii M 7.4 Earthquake
On April 2, 1868, a powerful earthquake measuring at least M 7.4 rocked the Hawaiian Islands. The quake was centered off the eastern coast of Hawaii, about 30 miles east of Kilauea and registered shaking intensities of X-XI on the Modified Mercalli Intensity scale (a relative shaking intensity scale from 1-12 shown in Roman numerals).

Reports indicated the motion was so violent on the east coast it was difficult to stand. Nearly every wooden house in Keiawa, Penaluu, Ninole, and other places, was knocked off its foundation or toppled over. Walls in Hilo were thrown down.

Five days after the earthquake, Kilauea erupted from a 3 mile fissure that developed on the volcano's northeastern flank.

The earthquake caused a tremendous tsunami that slammed into the Kau-Puna coast. Some reports said the wave easily cleared 60 foot tall coconut trees, swept the beach front ripping out trees and dragging things not fixed down out to sea.


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