Last Known Eruption
3d 5h 32m ago

Interval Statistics

Interval Count15
Min20m
Max40y 63d 23h 35m
Mean3y 152d 11h 8m
Median5d 17h 3m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
19000 22 Aug 2021 @ 0904 --- MAB clear water - small rippling waves
18765 31 Jul 2021 @ 0840 --- MAB clear water visible w grumbly boil sounds
18041 22 Jun 2021 @ 0852 --- MAB clear water is agitated- water level looks lower
17719 12 Jun 2021 @ 1859 --- MAB agitated - very steamy on this hot day
17072 12 May 2021 @ 0934 --- MAB Clear - bubbles from south edge
16950 28 Apr 2021 @ 0929 --- MAB Clear - ripples
9869 25 Aug 2018 @ 1044 --- cb ( Basin geyser in Porcelain basin?) Audible gurgling sounds and thick steam coming from just above the big rock above the pool closest to the boardwalk. Its pool has strong convection waves!
5369 24 Jun 1989 @ 1800 --- research-mab 6/24/1989 Basin G continues to have milky, polymerized silica in water.
4793 18 Jun 1989 @ 1600 --- research-mab 6/18/1989 Basin Geyser is milky & overflowing!
4850 20 Aug 1985 @ 1800 --- research-mab 8/20/1985 Basin Geyser = 203º Water erupting ½ to 1 foot in a rock crevice on the middle of the side nearest the boardwalk – on the side of the pool
7618 11 Feb 1984 @ 1800 --- research-mab 02/11/1984 Basin Geyser Full & overflowing quietly, clear.
4864 26 Aug 1981 @ 1800 --- research-mab 8/26/81 The museum crew left today. They did an absolutely fantastic job. Gave them a final intimate tour of Porcelain Basin. Everything erupted for them (Sunday, Fireball, Arsenic, Basin, Constant, Big Whirligig, Splutter Pot, Blue and Graceful)
4792 01 Aug 1981 @ 1800 --- research-mab 08/01/1981 Basin Geyser’s water is highest I’ve ever seen, almost level with lowest rock on north side of pool This is where the main vent is continuously bubbling about one foot high.
4790 06 Sep 1980 @ 1800 --- research-mab 9/6/1980 Basin Geyser – water at bottom of pool (new activity in many years ) lots of chugging. Hot! 205ºF
5528 04 Jun 1976 @ 1800 --- research-mab 06/04/1976 Not yet noted is the fact that Basin Geyser is now a fumerole, no water present.
5653 22 Aug 1975 @ 1800 --- research-mab 08/22/1975 Basin bubbling on both sides of its vent.
5846 24 Sep 1974 @ 1800 --- research-mab 09/24/1974 Basin – more active & some H20 is overflowing the basin area.
6188 29 Sep 1973 @ 1800 --- research-mab 09/29/1973 Basin Geyser has shifted vents completely during the summer and now is exhibiting quite a bit of bubbling NE of its new vent.
6042 23 Jul 1973 @ 1800 --- research-mab 07/23/1973 Mystic Spring muddy – also Milky Complex, Basin Geyser
6465 17 Sep 1972 @ 1800 --- research-mab 09/17/1972 Basin Geyser is now a cloudy dull green.
6458 10 Sep 1972 @ 1800 --- research-mab 09/10/1972 Basin Geyser during the past 5 days the color of the pool has again been changing – this time to a moderately cloudy blue-green color.
6459 10 Sep 1972 @ 1800 --- research-mab 09/10/1972 Basin Geyser during the past 5 days the color of the pool has again been changing – this time to a moderately cloudy blue-green color.
6431 31 Aug 1972 @ 1800 --- research-mab 08/31/1972 The water in Basin Geyser has been completely clear for about the last three days
6424 19 Aug 1972 @ 1800 --- research-mab 08/19/1972 Basin Geyser- has pretty much regained its opalescent blue color, however runoff is still very low.
6417 17 Aug 1972 @ 1800 --- research-mab 08/17/1972 Basin Geyser discharge is roughly 1/8th of what it was in June & July. Runoff temp max=56º, pool temp=92º
6411 15 Aug 1972 @ 1800 --- research-mab 08/15/1972 Basin Geyser - starting to turn to a blue gray color
6304 14 May 1972 @ 1800 --- research-mab 05/14/1972 The following changes have been noted: Basin Geyser is a beautiful almost opalescent blue with a steady run off, apparently no fluctuation, some sputtering 1’-2’ high at south end of pool.
6306 14 May 1972 @ 1800 --- research-mab 05/14/1972 The following geysers have been seen erupting since I arrived last night: Ledge 6-10’, Iris 2-3’, Little Whirligig 15’, Basin 1’-2’, Fan 4’-5’, Bear Den, Feisty, Fireball 2-3’, Minute 1’-2’, Blue 7-15’, Africa 25-35’, Vixen 7’-15’, Dr Morey’s Porkchop 3’-5’, Echinus 10’-40’, Steamboat 5-20’
6579 09 Sep 1971 @ 1200 --- research-mab 09/09/1971 Basin Geyser has returned to its activity similar to last summer with two exceptions - the pool never fills to overflowing and drops about four feet and a small vent in the rocks just west of the pool is much more active with constant ebullition. Some bursts as high as 3’. {morning time}
6564 08 Aug 1971 @ 1230 08 Aug 1971 @ 1523 research-mab 08/08/1971 When checked at approx. 12:30 Basin Geyser was an almost dry fumerole, empty at 3:23.
6563 05 Aug 1971 @ 1800 --- research-mab 08/05/1971 The eruptive behavior of Basin Geyser has changed. - there is a small continuous steam jet at the east end of the pool.
6559 21 Jul 1971 @ 1000 --- research-mab 07/21/1971 Basin Geyser water very low this am; no water last night at 6:00 pm. {generic morning time}
6547 11 Jun 1971 @ 1000 --- research-mab 06/11/1971 There was an impressive display this morning the Basin Geyser erupting to 10 feet, Africa playing to 30 feet and Little Whirligig all going off at the same time. {morning- no specific time noted}
6596 07 Sep 1970 @ 1800 --- research-mab 09/07/1970 Basin Geyser has had no real change, erupting to an average height of 4 to 6 feet.
6619 01 Sep 1970 @ 1300 --- research-mab 09/01/1970 A survey of pools and geysers in the area made during the {Ledge} eruption showed that Jetsam Pool had a larger volume (3 times) of run-off than usual. Basin was about completely drained with a small amount of water splashing about in the bottom of its fissure. As I write this at 3:55 there is still a considerable amount of steam still emerging under pressure from the Ledge geyser.
6609 05 Jul 1970 @ 1800 --- research-mab 07/05/1970 Basin Geyser erupted some twenty feet for a period of one minute. {no specific time noted}
6589 05 Jun 1970 @ 1800 --- research-mab 06/05/1970 Basin has started to act more like a geyser. The water in Basin is gray with clay.
6883 18 Jun 1965 @ 1800 --- research-mab 06/18/1965 Basin – Good show most of the day.
6882 17 Jun 1965 @ 1800 --- research-mab 06/17/1965 Basin - Put on several good shows today, some eruptions were frm 30-40 ft.
6877 14 Jun 1965 @ 1800 --- research-mab 06/14/1965 Basin – It appears to me that the geyser is steadily decreasing in activity – time will tell.
6870 08 Jun 1965 @ 1800 --- research-mab 06/08/1965 Basin – Appeared to be a little stronger (more active) today than yesterday.
No attachments for this geyser.
Baseline does not exist.