| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 36443 |
18 Aug 2024 @ 1326 |
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Janet Jones |
Boiling cyclically from the back edge. No boiling at allfrom the edge closest to the boardwalk. |
| 36077 |
24 Jul 2024 @ 1610 |
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JarnoO |
(wc) The runoff channel beginning east of the vent going directly SSW is starting to show hints of orange. The established runoff channel exiting the pool also has orange returning, though only straight down to the plateau and not its branches. East vent remains active, at times vigorous; pool itself appears flat. |
| 35689 |
02 Jul 2024 @ 2030 |
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K.Cooper |
Boiling from a different vent than usual. While the normal vent is usually more left on the pool, this is back right when looking at it from the plume bench
Behavior is more of a jetting type burst that boil.
Activity is consistent at least 6in high, many episodes over three feet |
| 35687 |
02 Jul 2024 @ 1905 |
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JarnoO |
(wc) I've been looking at it for the last 10 minutes or so, and the only hint at periodicity is that the splashing (originating from the vent at the eastern edge of the pool) gets lower and slightly more spaced apart for a couple of seconds every 10-20 seconds. Otherwise it's in constant state of agitation. Not sure if this is "old news" (it certainly was new to me), but I looked at my captures from yesterday (which never zoomed in on Improbable, unlike with this observation) and it didn't seem to be the case then. Additionally, it appears a new runoff channel has developed in the past couple of weeks/months (maybe too long of a timeframe?), judging by the dark geyserite, which starts east of the active vent and heads immediately SSW to the "bench" on which the bacterial mat has been relocated to. |
| 34110 |
12 Mar 2024 @ 1908 |
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JarnoO |
(wc) Sudden, tall jet (I estimate about the height of Beehive's Indicator at full force, 10-odd feet or so) as wide as the crater. Otherwise ordinary activity as of writing (1913). |
| 33863 |
17 Jan 2024 @ 1640 |
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K.Cooper |
lots of large and loud boils. some of which are around 8ft |
| 33476 |
27 Dec 2023 @ 1515 |
27 Dec 2023 @ 1520 |
Delta4Heavy85 |
(Wc) Mostly small boils with the occasional taller boil up to maybe 1-2 ft. |
| 28196 |
10 Sep 2023 @ 1708 |
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SantaFe108 |
Appears to be a large stick in Improbable's vent. |
| 26303 |
14 Jun 2023 @ 1604 |
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Graham |
Just at overflow, filled with milky water. Boiling up to 6 inches on Plume side. Water rising, overflowing down the slope.
1620 some boil surges reaching a foot or two, pre eruptive boil surges were stronger. |
| 26302 |
14 Jun 2023 @ 1445 |
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aferrara |
Totally empty, boardwalk soaked, smells like the ocean. |
| 26186 |
09 Jun 2023 @ 0944 |
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CrisG |
nice splash to 5-6ft. Enough to steal my attention from Anemone |
| 25935 |
31 May 2023 @ 1619 |
31 May 2023 @ 1626 |
Delta4Heavy85 |
Large splashes at 16:21:51, 16:22:14, 16:23:34, 16:24:10 and 16:24:29 |
| 25615 |
20 May 2023 @ 2008 |
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Brando |
Had a ~8 second push to 3-4 feet |
| 25362 |
08 May 2023 @ 1252 |
08 May 2023 @ 1320 |
Delta4Heavy85 |
Good splashes at 12:57:44, 12:57:57, 13:04:20, 13:06:41, 13:08:15, 13:12:26, 13:16:33, 13:18:39 and 13:20:36 |
| 25170 |
16 Apr 2023 @ 1209 |
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Delta4Heavy85 |
Another good boil, about twice as high as the last two (~10 feet). |
| 25169 |
16 Apr 2023 @ 1204 |
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Delta4Heavy85 |
Two sizable boils (~5 feet) for ~5s each |
| 24917 |
16 Jan 2023 @ 0937 |
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Delta4Heavy85 |
(wc) Nice (~4ft) surging and constant low splashing |
| 24785 |
20 Dec 2022 @ 0759 |
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Delta4Heavy85 |
Splashing |
| 24632 |
03 Nov 2022 @ 1616 |
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Delta4Heavy85 |
Splashing |
| 24599 |
31 Oct 2022 @ 1527 |
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Delta4Heavy85 |
Splashing |
| 16887 |
19 Apr 2021 @ 1523 |
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JarnoO |
1523:44 through 1524:00 - three tall jets. First jet 1523:44, second 1523:56, third 1523:58. Height of each higher than Anemone-Big's larger play, between 6-10 feet or so with the first and second being the tallest. Third about 6 feet at most. First jet was accompanied by a steam plume which remained attached to the vent for 8 seconds, so some further action must have happened which was obscured by it. Initially assumed to be Anemone-Big because of this play, but this one erupted 4 minutes later. Remained restless in the minutes after. |
| 14661 |
18 Jun 2020 @ 1532 |
18 Jun 2020 @ 1552 |
JarnoO |
(wc) 1-3 events/minute, mostly 3 events. Events were separated by about 10-20s of quiet (pause) and lasted themselves about equally long. Throughout this note, "same" refers to 1532a and 1533a for behavior.
1532a small boiling ie (¼ to ½ size of regular Anemone-Little play).
1533a boil (about Anemone-Little-sized), then small; 1533b same as 1533a.
1534a same, weak; 1534b same w/ sustained boil.
1535a same; 1535b big boil (Anemone-Big-sized) sustained; 1535c same, small (Anemone-Little-sized is probably generous).
1536a same, small; 1536b same, very small; 1536c same, v. small.
1537a same, small (long, ±15-20-odd seconds); 1537b same, small; 1537c same, small.
1538a same, big; 1538b (cam sync, no event); 1538c same, long.
1539a same, small (long pause ±15s preceded).
1540a same, small; 1540b same, small.
1541a same, small; 1541b same, small; 1541c same, decent start (Anemone-Little-sized), small otherwise.
1542a same, small; 1542b same, small.
1543a same, v. small (long pause ≥±20s preceded); 1543b same, v. small.
1544a same, v. small but picked up in size - lasted >30s; 1544b big start, small otherwise.
1545a same, Anemone-Big-sized start; 1545b same, small.
1546a same, small w/ big boil; 1546b same, sustained.
1547a same, short duration with long pause preceding; 1547b same, short pause. 1548a same, bigger than other events; 1548b same, decent boil on start.
1549a same, small.
1550a same, small (long pause preceded); 1550b same, small.
1551a same, v. small; 1551b same, v.small.
1552 cam panned away, end of observations. |
| 14186 |
14 May 2020 @ 0919 |
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K.Cooper |
(webcam) Improbable had a very large burst at this time, estimated to be at least 5, likely taller feet, and was sustained for about one second. |
| 11443 |
31 May 2019 @ 1131 |
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TSBryan |
single burst 4 or 5 feet high |
| 10224 |
15 Sep 2018 @ 2147 |
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Micah Kipple |
Low surging and roiling as normal. No evidence of major eruption. |
| 10578 |
10 Sep 2018 @ 1214 |
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Polly |
2' burst |
| 8658 |
13 Jun 2018 @ 1400 |
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CrisG |
Nice, wide 2.5-3 ft burst. |
| 8064 |
03 May 2018 @ 1215 |
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Micah Kipple |
Violent superheated boiling 30-60 cm with some surges to 1.3m |
| 8012 |
27 Apr 2018 @ 0632 |
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Micah Kipple |
Having nice bursts this morning |
| 7999 |
25 Apr 2018 @ 1603 |
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Micah Kipple |
Large sudden burst to 3 feet filling most of the pool |
| 7988 |
22 Apr 2018 @ 1010 |
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udo |
3 to 4 foot bursts happen randomly. Smaller stuff is nearly constant. |
| 7864 |
27 Dec 2017 @ 1242 |
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novakg |
Nice 2 foot burst. |
| 5671 |
03 Sep 2017 @ 1133 |
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Pat Snyder |
5 foot single burst, wide and surprising! Very cool. |
| 3976 |
21 Apr 2017 @ 0806 |
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Micah Kipple |
No evidence for recent major eruptions. |
| 3845 |
04 Nov 2016 @ 1724 |
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Betty |
nice tall burst for 1 second or 2, think about 3-4 ft. |
| 3165 |
22 Jun 2016 @ 0824 |
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David |
spouting 1-2'. see: https://www.flickr.com/photos/ujelang/27940051561/in/dateposted-public/ |
| 3331 |
22 Jun 2016 @ 0821 |
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David |
observed from 8:21-8:30. In a state of near constant boiling, with max of 1+ ft. See photos: https://www.flickr.com/search/?user_id=93705139%40N00&sort=date-taken-desc&text=improbable%20geyser&view_all=1 |
| 3358 |
11 Jun 2016 @ 1000 |
11 Jun 2016 @ 1200 |
JSJ |
Thermal photography of Improbable Geyser in low perpetual spouting recorded 162° F. |
| 2585 |
25 Oct 2015 @ 1034 |
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Biddle |
possible eruption seen on webcam |
| 2334 |
03 Sep 2015 @ 1858 |
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bhoppe |
Huge splash/surge to 5ish feet |
| 2167 |
19 Aug 2015 @ 0800 |
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Micah Kipple |
Still slightly murky this morning. Teal blue water with a little more vigorous boiling than normal. No evidence of a followup eruption overnight. |
| 2129 |
16 Aug 2015 @ 0800 |
16 Aug 2015 @ 0853 |
Micah Kipple |
Lots of strong boiling this morning. A couple "almost minors" to 4 feet, and at 0853 there was a botryoidal-like bubble to 2 feet that was spectacularly beautiful, if not startling. |
| 1888 |
11 Jul 2015 @ 1530 |
11 Jul 2015 @ 1710 |
Micah Kipple |
Improbable had several large episodes of violent boiling over the west (new vent) that I observed during this time period. Some of the surges were 3 feet tall and just as wide and sent a small flood or runoff down it's channels. |
| 1510 |
18 Jan 2015 @ 0730 |
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mhreed |
Snow marker placed in the late afternoon on the 17th was missing. Possible that the snow simply melted due to warm ground/warm air temperature, but ice chunks completely gone leading me to speculate that it may have had an event overnight. Pool color is completely back to normal. |
| 1507 |
17 Jan 2015 @ 0740 |
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WillBoekel |
snow marker still in place from last night. and the pool color is starting to clear |
| 1185 |
08 Jul 2014 @ 0800 |
08 Jul 2014 @ 1800 |
JSJ |
Improbable Geyser in eruption during late morning & early afternoon on 8 July 2014 - doing its usual moderately low perpetual spouting. |
| 1198 |
03 Jun 2014 @ 1200 |
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JSJ |
Improbable Geyser was doing its usual, moderately-low perpetual spouting - observed around noon time on 3 June 2014. |
| 2713 |
10 Aug 2013 @ 1444 |
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JSJ |
Improbable Geyser was engaged in its usual, moderately low perpetual spouting behavior - observed in the middle & late afternoon of 10 August 2013. |