There are data loggers on Castle, Daisy, Grand, Grotto, and Oblong Geysers. The following sections briefly discuss the results.

Castle Geyser

The Castle logger was deployed rather late in the season, so we have data from only August and September. During that time, Castle's intervals have remained firmly at just over 12 hours excluding minor eruptions. There were four intervals between 13 and 14 hours, and one at 11:30, but the rest were between 11:40 and 12:30. There have been 17 minors between 13 August and 26 September. The interval from the minor to the subsequent major eruption ranged from 3: 12 to 10:09 with the mean interval being 6:33. The mean interval between the first two major eruptions following the minor was 12:58, or just about one hour longer than the normal intervals. We hope to maintain a data logger on Castle for the whole winter, so any seasonal change should be captured.

Daisy Geyser

Daisy Geyser has been quite steady at about two hours. There have been occasional intervals of as much as five hours (on 17 May) and numerous intervals between 2:25 and 2:30, mostly before 20 June. There were also several long intervals (2:30 to 3:15) on 4 and 5 August. The only recent long interval was 3:22 on 17 September at 10:19. On the whole, Daisy has been quite regular, rarely falling outside the prediction window.

Grand Geyser -- [ Charts ]