Smithson. Miscell. Cols., 37-Appendix, p. 71, contains the account of a quartermaster’s clerk, L. Tennyson, at Fort Klamath, Oregon, who writes that at daylight on Jan. 8, 1867, the garrison was startled awake by what they thought was an earthquake and “a sound like thunder.” The sky was covered with black smoke or clouds, and brownish ashes fell. Half an hour later, another shock occurred, described as “frightful.” The vibrations lasted several minutes. In the direction of the Klamath Marsh, he saw a dark column of smoke, so he thought a volcano had erupted. Fort found no record of an eruption in Oregon during that time.
–Charles Fort, New Lands, p. 437 (The Complete Books of Charles Fort, Dover, c1974).