Fan & Mortar Geysers eruption sequence, 31-Dec-97 to 7-Mar-98. Calculated from mixed-unit intervals posted to geysers@wwc.edu on 12-Mar-98 by Jens Day. Interval (min) 5677 4156 5584 4605 5203 2746 4125 5689 6103 3865 5364 4502 6534 4730 4864 4026 8558 8188