| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 18640 |
23 Jul 2021 @ 2220 |
24 Jul 2021 @ 0030 |
Tara |
No eruption during this time. Stall behavior: Fountain and Morning water levels high, Spasm high and surging 2-4', Clepsydra pausing and restarting periodically, Jet rumbling constantly with erratic eruptions. Clepsydra last pause 0013 and last restart 0016, steady from then until 0030 when I left the area. I am confident the 10h interval is closed. |
| 18423 |
14 Jul 2021 @ 1110 |
14 Jul 2021 @ 1305 |
Tara |
No eruption during this time |
| 17966 |
21 Jun 2021 @ 1544 |
--- |
Scott H |
tour guide report seeing Fountsin between 1530 and 1600 |
| 17783 |
14 Jun 2021 @ 0001 |
14 Jun 2021 @ 1200 |
aferrara |
Electronic logger seems to be missing some (not all) mid-day eruptions. Eruptions observed directly are not always represented in the logger data in that time period. Long intervals, as always, may or may not represent closed intervals, even with the assistance of the electronic logger. |
| 17785 |
14 Jun 2021 @ 0835 |
--- |
Graham |
Empty and damp. Clepsydra side pool water high. Clepsydra on steady, not trying to pause. Ftn must have erupted recently, maybe 0700 to 0730? (0737 per Lynn) Spasm empty. No water visible in Jelly. 0850 water slightly higher in Ftn but still full of rocks. No water visible in Morning. 0905 Jelly water rising, deep in the vent. 0920, 0935 unchanged, Jelly slowly rising. 0950 Fountain water level down a little to "normal" level. 1005 Clepsydra side vent boiling on left side. 1020 unchanged. 1035 water barely visible in Morning. 1050 unchanged. |
| 17758 |
13 Jun 2021 @ 1630 |
13 Jun 2021 @ 1920 |
Tara |
high water level in Fountain and Morning, Spasm full & intermittently bursting 2-4', Clepsydra pausing, Jet dry and grumbling. Water levels rose in F, M, & MT which showed visible boiling at 1806. Jet grumbling got louder until it erupted at 1800. Clepsydra last pause 1822, on at 1826, full strength & steady at 1835. F, M, & MT dropped a few inches after Clep became steady, no eruptions from any of the 3 as of 1920. Will fill in more details later. |
| 17738 |
12 Jun 2021 @ 2100 |
13 Jun 2021 @ 0035 |
William |
did not erupt during this time |
| 17734 |
12 Jun 2021 @ 2057 |
--- |
William |
12"-16" below rim |
| 17709 |
12 Jun 2021 @ 0949 |
--- |
bbev |
water is high, 16-18" below rim |
| 17364 |
01 Jun 2021 @ 2140 |
--- |
Tara |
Had not erupted as of this time. |
| 17222 |
28 May 2021 @ 0830 |
--- |
Tara |
Looked post eruptive. Twig just ending, Fountain runoff wet, Clepsydra side vent down several inches, Spasm draining. |
| 17211 |
27 May 2021 @ 1911 |
--- |
JSJ |
Inclinometer reading: height of Fountain Geyser's 1911 to 1938 eruption was 67 feet at least. Two decent bursts later in the eruption weren't measured. |
| 17202 |
27 May 2021 @ 1530 |
--- |
bbev |
water in pool visible from boardwalk, 16" below rim and up into the channel. |
| 17110 |
17 May 2021 @ 0810 |
17 May 2021 @ 0930 |
Tara |
In area for this time, no eruption of Fountain. It had been at least 2 hrs since the previous eruption based on runoff channels. |
| 16444 |
19 Oct 2020 @ 0935 |
--- |
William |
no water visible in Fountain, Clep side vent also empty. |
| 16099 |
13 Sep 2020 @ 0831 |
--- |
WillBoekel |
post eruptive |
| 15681 |
22 Aug 2020 @ 1320 |
--- |
deanl |
platform was wet from recent eruption, so assume it was12:30-12:40-ish? |
| 15644 |
18 Aug 2020 @ 1850 |
18 Aug 2020 @ 2115 |
BrandonC |
Observed from great fountain and checked fountain from 2030-2115
Good pool when I was leaving |
| 15564 |
13 Aug 2020 @ 1319 |
13 Aug 2020 @ 1343 |
JSJ |
Highest water during Fountain Geyser's 1:19 to 1:43 PM eruption was about 66 feet. |
| 15529 |
11 Aug 2020 @ 1450 |
11 Aug 2020 @ 1516 |
JSJ |
Inclinometer reading: highest water during Fountain Geyser's 2:50 to 3:16 PM eruption was about 58 feet. |
| 15152 |
02 Aug 2020 @ 1731 |
--- |
JSJ |
Inclinometer reading: highest water during Fountain Geyser's 5:31 to 6:02 PM eruption was about 75 feet. |
| 15056 |
20 Jul 2020 @ 1745 |
--- |
William |
no water visible |
| 15038 |
19 Jul 2020 @ 1420 |
19 Jul 2020 @ 1445 |
Yates |
Was driving and didn’t catch the precise time but was ie on my way from Norris to UGB |
| 14855 |
02 Jul 2020 @ 0815 |
--- |
Graham |
Clep side pool splashy. Spasm down. Jelly dropping. PEANOT down but filling. |
| 14680 |
19 Jun 2020 @ 0900 |
--- |
Ben VL |
Visitors reported to me a fountain duration exceeding 40 minutes for an eruption sometime this morning. Their description matched an eruption of fountain so I thought I should make a note. |
| 14640 |
14 Jun 2020 @ 1748 |
--- |
CraigC |
From Great Fountain observed steam rise just above the trees in the area of Fountain when no steam had been visible for the previous 20 minutes |
| 14629 |
13 Jun 2020 @ 1406 |
--- |
William |
post eruptive, clep paused |
| 14048 |
22 Dec 2019 @ 2033 |
--- |
Micah Kipple |
No fountain yet. |
| 14045 |
20 Dec 2019 @ 0909 |
--- |
Micah Kipple |
Water very high in both Fountain and Morning. Clepsydra Weak and pausing infrequently. |
| 13892 |
06 Oct 2019 @ 0726 |
--- |
jkgood |
I believe I just missed an eruption. Water in shoulder pools still steaming. Clep was off on arrival at 7:26- restarted 7:29/ stopped again ~7:34- back on 7:41
Jet grumbling and boardwalk spattered by SPF |
| 13881 |
04 Oct 2019 @ 1844 |
--- |
Tara |
no eruption as of this time. |
| 13877 |
04 Oct 2019 @ 1800 |
--- |
Tara |
Water level extremely high in both Fountain and Morning. Water well out the "neck" of Ftn, maybe 1 foot below rim. Looks to be a stall, though I did not see any unusual behavior from Clepsydra during my time observing the group. |
| 13783 |
23 Sep 2019 @ 0903 |
--- |
mroseum |
logger battery dead |
| 13772 |
20 Sep 2019 @ 1840 |
--- |
Ben VL |
Clep side vent empty splashing. Water in Morning well below island.
A couple jets observed.
My guess is somewhere mid-cycle between two eruptions. |
| 13661 |
12 Sep 2019 @ 1218 |
--- |
Barbara Lasseter |
2 parallel steams from fountain area as seen from FLdr |
| 13640 |
10 Sep 2019 @ 0811 |
--- |
Barbara Lasseter |
Big steam began as seen from Thud pullout. Ended 0848. Clepsydra steam continued for30 min after |
| 13484 |
29 Aug 2019 @ 0000 |
--- |
mroseum |
Fountain Logger only shows later morning starting 8/29. No electronic back-logs before that can be made |
| 13140 |
10 Aug 2019 @ 0620 |
--- |
RMichaels |
Based on water surrounding platform, no water seen in Morning or Fountain, and Clepsydra's side vent being full of water, I would assume an eruption occurred sometime in previous hour. |
| 13060 |
05 Aug 2019 @ 2119 |
--- |
Stephen_Gemar |
No eruption of Fountain as of 19:19. Water had been sitting part way up the crater, almost to the top of the large dark notch on the back of Fountain’s crater, and didn’t seem to move during our observation. |
| 12939 |
01 Aug 2019 @ 1421 |
01 Aug 2019 @ 1458 |
JSJ |
Inclinometer: highest water at least ~58 feet. Saw a taller spout but didn't get a chance to measure. |
| 12870 |
29 Jul 2019 @ 2005 |
--- |
Tara |
Fountain's formation and runoff channel still wet. Clepsydra side vent about a half inch below rim, gently bubbling and pulsating. Back side if Morning dry. Puddles around Morning's Thief. |
| 12790 |
24 Jul 2019 @ 1545 |
--- |
Tara |
No eruption yet since 0615ie Fountain. No water or much steam from Morning's Thief as of 1530. Water level in Morning was rising extremely slowly and as of 1530 had not covered the "island" next to the peninsula on the left side of the crater. It had a lazy boil with very little convection at that time. |
| 12508 |
17 Jul 2019 @ 1355 |
17 Jul 2019 @ 1445 |
Tara |
Formation dry, water levels in Fountain and Morning looked like Fountain was in eruption window, Jet initial at 1412. |
| 12484 |
14 Jul 2019 @ 1301 |
--- |
jazzknick |
Water slowly rising in Fountain and Morning, approx 2 inches per hour est. apart from Clepsydra, no other associated features active. |
| 12483 |
14 Jul 2019 @ 1231 |
14 Jul 2019 @ 1233 |
jazzknick |
Fountain & Morning water level 3 ft below rim and gently steaming. Runoff channels dry in 83 degrees temps. No other features active except Clepsydra is. |
| 12470 |
13 Jul 2019 @ 0505 |
--- |
ypcaribou |
Two tall columns of steam seen from road southbound. One was Clepsydra. Other to left of Clepsydra. |
| 12461 |
12 Jul 2019 @ 1820 |
--- |
Tara |
No eruption as of 1820, water visible in Morning's Thief starting at 1712. |
| 12406 |
07 Jul 2019 @ 0520 |
--- |
LynnS |
Steam in the north portion of the runoff channel east of the crater indicates Fountain recently erupted. Eruption finished before 0520 |
| 12052 |
30 Jun 2019 @ 0530 |
--- |
LynnS |
Clepsydra was ie, Fountain had recently finished an eruption. Clepsydra’s side vent still a blue pool filled with water. Jet was not erupting at one to five minute intervals so the recent eruption of Fountain was not a dual with Morning. |
| 11849 |
16 Jun 2019 @ 2050 |
--- |
LynnS |
Had not yet erupted |
| 11780 |
14 Jun 2019 @ 0829 |
--- |
William |
post eruptive. water barely visible in Fountain, no water visible in Morning. New Thing mostly drained. |
| 11778 |
13 Jun 2019 @ 1548 |
13 Jun 2019 @ 1622 |
JSJ |
Inclinometer readings: Fountain Geyser's highest spouts reached 54 to about 65 feet high. |
| 11735 |
11 Jun 2019 @ 1834 |
11 Jun 2019 @ 1907 |
JSJ |
Inclinometer reading: Fountain Geyser's eruption reached 60 to 64 feet high. |
| 11652 |
08 Jun 2019 @ 0725 |
--- |
LynnS |
Water level in Clepsydra’s side vent (CSV) visible but pool is not completely full. Estimated time of most frequent Fountain eruption is about 1-1/12 to 2-1/2 hours ago based on other observations made over the past two weeks of the relationship between the water level in CSV and Fountain’s eruptions. |
| 11641 |
07 Jun 2019 @ 2120 |
--- |
William |
no eruption prior to 21:20. |
| 11640 |
07 Jun 2019 @ 2112 |
--- |
User34 |
Does not appear to have erupted by this time |
| 11633 |
07 Jun 2019 @ 1218 |
--- |
JSJ |
Inclinometer reading: tallest Fountain bursts about 62 feet high. |
| 11487 |
01 Jun 2019 @ 2310 |
--- |
Tara |
No eruption yet. |
| 11422 |
30 May 2019 @ 0220 |
--- |
Graham |
End of eruption that started yesterday at 2304. |
| 11368 |
26 May 2019 @ 1558 |
--- |
Micah Kipple |
Surroundings are relatively dry and there is water visible in the crater |
| 11472 |
23 May 2019 @ 1330 |
23 May 2019 @ 2100 |
Ben VL |
Arrived around 13:30 to find Clep pausing frequently and high water levels in Fountain and Morning. We all thought the behavior was odd, because we thought Fountain's interval was approaching 8h. Found out later that Fountain went short and erupted just under three hours before we arrived. Mystery solved. The Fountain group was in a stall for most of the afternoon. At 14:49, Fountain had water within a foot of overflow. Noted at 16:07 that Fountain appeared to be dropping. Water was high in Morning the whole time, and we did note convection at 14:37 as well as some bubbles later on and throughout a lot of the afternoon. Clepsydra was having long, frequent pauses early in the afternoon, the last one I noted started at 14:33. Jet was not in series as far as I'm aware when we arrived, but the activity slowly picked up throughout the day. Several Twig's - though I only noted one at 14:28 - and activity from other features. We first noticed bubbling in MT at 15:14. That eventually progressed to a boil, and an eruption at 20:28. We left after that.
Just as we were about to go behind the trees driving away, saw Fountain's steam column start to rise. 20:42, likely ns. We went back to take a look. Just Fountain, with a beautiful sunset in the background. Could have been more MT's, did not stick around for duration. |
| 11334 |
23 May 2019 @ 1300 |
23 May 2019 @ 1625 |
Kyle |
fountain in a stall. Clepsydra switching frequently from on to off. morning very full, less than 1 ft below rim. Fountain as full as less than 1 ft below rim and pushing up the "neck". Jet rumbling almost non stop but rarely showing any water |
| 11273 |
20 May 2019 @ 1020 |
--- |
Micah Kipple |
Morning and Fountain both have decent water levels but the whole complex is quiet |
| 11251 |
16 May 2019 @ 1451 |
16 May 2019 @ 1653 |
bbev |
Water could be seen by standing on middle rail of boardwalk upon arrival. Water rose maybe 3-5" during 2 hours, and was still only visible standing on middle rail. |
| 11170 |
05 May 2019 @ 0640 |
05 May 2019 @ 0654 |
RLJones |
It appears that fountain went off very recently. Both F and M are steaming, no water in Morning. Channel between F and M very wet. Frost on boardwalk except near F where there is water. Clepsydra is in full eruption.
One eruption of Jet |
| 10938 |
04 Feb 2019 @ 1330 |
--- |
ypcaribou |
Time approximate. Clepsydra & Jet quiet. Fountain empty. Per post on Facebook with photos. |
| 10939 |
03 Feb 2019 @ 1100 |
--- |
ypcaribou |
Time approximate. Clepsydra not erupting per Facebook comment with photo. |
| 10711 |
03 Nov 2018 @ 1850 |
--- |
jkgood |
Still no fountain. Saw no activity in morning, tho hard to see for steam |
| 10713 |
03 Nov 2018 @ 1530 |
--- |
ypcaribou |
Clepsydra active. Spasm full with center boil. Jelly about 1/2 full. Jet quiet. Super Frying Pan empty, quiet, dry. Fountain and Morning had no visibal water from boardwalk or from upper platform and looked dry all around. |
| 10563 |
05 Oct 2018 @ 1140 |
--- |
DanS |
Platform wet. No water in sight. |
| 10549 |
04 Oct 2018 @ 1005 |
--- |
bbev |
Water seen in bottom of fountain. |
| 10542 |
04 Oct 2018 @ 0700 |
--- |
William |
No water visible in Fountain crater. Water level very low in Morning. |
| 10535 |
03 Oct 2018 @ 0830 |
--- |
ThomasR |
Pool about 2.5 feet below the rim. Platform around Fountain wet with some puddles. Spasm is empty and New Thing at Clepsydra has a low pool. No Twig. |
| 10527 |
02 Oct 2018 @ 1715 |
--- |
ThomasR |
Fountain pool about 1.5 feet below the rim. Easily viewable from the boardwalk and covering all the rocks at the back. |
| 10205 |
15 Sep 2018 @ 0307 |
--- |
Suzanne |
runoff channels wet and steamy |
| 10128 |
10 Sep 2018 @ 0745 |
--- |
Kitt B |
no water visable in Morning and Fountain run off area was was damp with patches of dry sinter. |
| 10126 |
09 Sep 2018 @ 2100 |
--- |
Kitt B |
No Fountain as of 2100 |
| 10016 |
03 Sep 2018 @ 1436 |
03 Sep 2018 @ 2000 |
steve |
When I arrived at Fountain it was in a stall. Jim H. Was out about an half an hour before me and saw the same thing, Clep and Twig on and off, the water in Fountain and Morning was high and easly visable from the boardwalk,. Clep finally turned on and stayed on at 1626. After that the water levels in Fountain and Morning dropped about 4 inches and stayed at that level untol I left at 2000 with no eruption. |
| 10013 |
03 Sep 2018 @ 1545 |
--- |
Graham |
"Fountain full of water. Morning full of water. Clepsydra going on & off. Had to leave with tour. Ranger & NPS Volunteer on site." Reported as an approximate time eruption but I converted it to a note. |
| 10082 |
03 Sep 2018 @ 0757 |
--- |
Polly |
Very large steam cloud above the fog bank. Looked like it was in the Fountain spot. |
| 10068 |
03 Sep 2018 @ 0706 |
--- |
Barbara Lasseter |
2 steam columns seen from loop road on fountain platform--one near base of stairs |
| 9908 |
28 Aug 2018 @ 0845 |
28 Aug 2018 @ 1039 |
Scott H |
no eruption during this time |
| 9849 |
24 Aug 2018 @ 0615 |
24 Aug 2018 @ 0700 |
JimS |
No water visible, lightly steaming. |
| 9841 |
23 Aug 2018 @ 0627 |
--- |
JimS |
Empty at 0627 with very light steam. |
| 9774 |
18 Aug 2018 @ 2015 |
18 Aug 2018 @ 2105 |
Tara |
Sinter dry, water level easily visible in Morning, Clepsydra on strong. No eruption as of 2105. |
| 9497 |
06 Aug 2018 @ 1850 |
--- |
Stephen_Gemar |
Appeared to have erupted recently. Did not see Clepsydra pause, but all of Fountain’s runoff channels are very wet, and couldn’t see any water in the bottom of the crater. |
| 9489 |
06 Aug 2018 @ 0900 |
06 Aug 2018 @ 0945 |
Stephen_Gemar |
Water in the very bottom of the pool. No eruption as we left the parking lot. |
| 9407 |
02 Aug 2018 @ 2020 |
--- |
WillBoekel |
no eruption. water barely visible |
| 9122 |
10 Jul 2018 @ 2010 |
--- |
LynnS |
Still no eruption. |
| 9119 |
10 Jul 2018 @ 1930 |
--- |
Kitt B |
No Fountain. water visable in Fountain at 1750, Spasm was full and drained. Appears to be in a stall. |
| 9003 |
03 Jul 2018 @ 1520 |
03 Jul 2018 @ 1545 |
Tara |
Water visible in Fountain, formation dry. Possible stall. No eruption as of 1545. |
| 8633 |
11 Jun 2018 @ 1025 |
--- |
SteveO |
Left Fountain 0910, back at 1025. Fountain water level about 24 inches below the rim. Fountain runoff channels dry. Spasm lightly boiling and overflowing. |
| 8632 |
11 Jun 2018 @ 0722 |
11 Jun 2018 @ 0800 |
SteveO |
Fountain & Morning levels high, Fountain level about 15 inches from below the rim. Spasm erupting and full, Jelly full and runoff all the way down the hill. Pnot empty. |
| 8589 |
09 Jun 2018 @ 1615 |
--- |
Tara |
Recently post eruptive, water on shoulders of formation and Clepsydra's side vent still full. |
| 8077 |
05 May 2018 @ 0930 |
--- |
steve |
Fountain appeared to be in a stall this morning. Clepsydra shut off for 2 minutes at 0934 and had a few other times it was weak. Twig started at 1046. The water level the whole time was about 18 inches below the sinter rim, i left at 1115 |
| 7977 |
20 Apr 2018 @ 1905 |
20 Apr 2018 @ 2017 |
DanS |
No eruption from 1905-2017. Stall?
Jet was off but Twig was trying to erupt. |
| 7718 |
17 Oct 2017 @ 1600 |
17 Oct 2017 @ 1815 |
Maureen |
Lattucas observed Fountain during this time. No eruption. Clepsydra on and off at least twice. Stall? |
| 7530 |
28 Sep 2017 @ 1900 |
--- |
Kitt B |
in another stall with clepsydra pausing |
| 7469 |
27 Sep 2017 @ 1911 |
--- |
Kitt B |
Fountain in another stall |
| 7049 |
23 Sep 2017 @ 1640 |
23 Sep 2017 @ 1656 |
Tara |
Stall behavior. Fountain formation dry, water level well into the neck and corresponding high level in Morning. Spasm i.e., Clepsydra paused at 1640 and 1651 (d~4m). Jet rumbling a lot, one interval of 8m timed. Twig formation wet. |