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At 10:18 p.m., witnesses reported hearing a noise described as "a metallic sound and rending timbers, such as made by a falling boom."[26] Immediately afterward, an explosion occurred on the pier and a fire started. Five to seven seconds later[16][30][31], a more powerful explosion took place as the majority of the ordnance within and near the SS E. A. Bryan detonated in a huge fireball some 3 miles (4.8 km) in diameter.[31] Chunks of glowing hot metal and burning ordnance were flung over 12,000 feet (3,660 m) into the air.[16] The E. A. Bryan was completely destroyed and the Quinault was blown out of the water, torn into sections and thrown in several directions; the stern landed upside down in the water 500 feet (150 m) away. U.S. Coast Guard fire boat CG-60014-F was thrown 600 feet (180 m) upriver, where it sank. The pier, along with its boxcars, locomotive, rails, cargo and men, was blasted into pieces. Nearby boxcars, waiting within their revetments to be unloaded at midnight, were bent inward and crumpled by the force of the shock. The port's barracks and other buildings and much of the surrounding town were severely damaged. Shattering glass and a rain of jagged metal and undetonated munitions caused many additional injuries among both military and civilian populations, although no one outside the immediate pier area was killed.[32] Nearly $9.9 million worth of damage ($124 million in current value) was caused to U.S. Government property.[33] Seismographs at the University of California, Berkeley sensed the two shock waves traveling through the ground, determining the second, larger event to be equivalent to an earthquake measuring 3.4 on the Richter scale.[34]

,Wiki article about it

National Park site...it's now a "National Memorial"