| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 17634 |
09 Jun 2021 @ 1940 |
--- |
CraigC |
start of overflow |
| 17563 |
08 Jun 2021 @ 0545 |
--- |
CraigC |
not in overflow |
| 17514 |
06 Jun 2021 @ 1914 |
--- |
CraigC |
4 strong series, 5th very weak nothing over 10 feet. 3rd had 3 amazing pops near beginning |
| 17500 |
05 Jun 2021 @ 2120 |
--- |
User34 |
Post-eruptive, boiling low pool |
| 17487 |
05 Jun 2021 @ 1625 |
--- |
Graham |
Still well below overflow. |
| 17396 |
02 Jun 2021 @ 2115 |
--- |
Micah Kipple |
Crashed several inches. Still aways from ovf unless it has a quick recovery. |
| 17363 |
01 Jun 2021 @ 2137 |
--- |
am |
Start of overflow |
| 17323 |
31 May 2021 @ 1352 |
--- |
JSJ |
Inclinometer reading: highest water during Great Fountain Geyser's 1st series = ~89 feet. |
| 17324 |
31 May 2021 @ 1324 |
--- |
JSJ |
Great Fountain's pre-eruption overflow reached Prawn Geyser's vent. |
| 17313 |
31 May 2021 @ 1234 |
--- |
LynnS |
Overflow |
| 17286 |
30 May 2021 @ 1455 |
--- |
LynnS |
Audible overflow ie |
| 17285 |
30 May 2021 @ 0530 |
--- |
LynnS |
In overflow |
| 17255 |
29 May 2021 @ 1648 |
--- |
LynnS |
Start of overflow |
| 17254 |
29 May 2021 @ 0610 |
--- |
LynnS |
Start of overflow |
| 17253 |
29 May 2021 @ 0530 |
--- |
LynnS |
Start of what turned out to be a false overflow; duration of overflow = 9 minutes. Followed by a crash in water level. |
| 17229 |
28 May 2021 @ 0920 |
--- |
Barbara Lasseter |
overflow began |
| 16422 |
14 Oct 2020 @ 1120 |
--- |
am |
Heavy overflow |
| 16385 |
10 Oct 2020 @ 0743 |
--- |
steve |
No eruption yet this morning. |
| 16382 |
09 Oct 2020 @ 1830 |
--- |
Art |
Pool full with visible boil up to 1-2’ from the south end of pool. Visitors stated no eruption since they had been observing (~20 minutes) |
| 16381 |
09 Oct 2020 @ 1700 |
--- |
Art |
Still ie. Saw several large bursts with water falling outside of crater. |
| 16379 |
09 Oct 2020 @ 1342 |
--- |
steve |
Quick rise and overflow again at 1342. This time it stayed up. |
| 16378 |
09 Oct 2020 @ 1300 |
--- |
steve |
In overflow again at 1300 and dropped just below overflow a few minutes later. Then several minutes after that it crashed. |
| 16377 |
09 Oct 2020 @ 1238 |
--- |
steve |
It went into overflow at 1238, but dropped out of overflow a couple of minutes later. |
| 16332 |
05 Oct 2020 @ 1005 |
--- |
steve |
First overflow at about 1005 after a fast rise. |
| 16329 |
04 Oct 2020 @ 1625 |
--- |
User34 |
Large crowd, low pool (couldn't tell if it was boiling or not), and still water on terraces. Not in overflow yet? |
| 16315 |
01 Oct 2020 @ 1701 |
--- |
mhvogel |
I want to give all of the geyser enthusiasts a heads up. Beginning today, October 1, the NPS will no longer be predicting Great Fountain for the rest of the year. Half of our staff has left and we don't have enough people on our staff to go to the other basins and get geyser data. I will personally get GF and Fountain data when I have time. We will resume GF predictions beginning in May of next year. However, I will continue to post GF and Fountain E times on Geysertimes. |
| 16288 |
27 Sep 2020 @ 1246 |
--- |
am |
In overflow when I arrived |
| 16281 |
27 Sep 2020 @ 0921 |
--- |
DanS |
Not in overflow |
| 15989 |
05 Sep 2020 @ 1640 |
--- |
jkgood |
Beginning of overflow |
| 15944 |
03 Sep 2020 @ 1830 |
--- |
CraigC |
start of overflow |
| 15902 |
30 Aug 2020 @ 1920 |
--- |
CraigC |
start of overflow.
1936 dropped, out of overflow. Back in overflow at 1942 |
| 15626 |
17 Aug 2020 @ 0955 |
--- |
Skippyphoto |
bubbling visible around rim. |
| 15625 |
17 Aug 2020 @ 0950 |
--- |
Skippyphoto |
sound of overflow started. |
| 15615 |
16 Aug 2020 @ 1948 |
--- |
CraigC |
start of overflow |
| 15540 |
12 Aug 2020 @ 1809 |
--- |
LynnS |
Great Fountain start of overflow |
| 15518 |
11 Aug 2020 @ 1744 |
--- |
CraigC |
in overflow |
| 15151 |
02 Aug 2020 @ 1405 |
--- |
aferrara |
Nearly in overflow at 1330, water level more than 1ft below overflow when I returned at 1405 |
| 15110 |
26 Jul 2020 @ 1545 |
--- |
CraigC |
in overflow per observer |
| 15070 |
21 Jul 2020 @ 1525 |
--- |
CraigC |
in overflow per Byron |
| 15061 |
21 Jul 2020 @ 0627 |
--- |
CraigC |
already in overflow |
| 15058 |
20 Jul 2020 @ 1822 |
--- |
William |
1st overflow |
| 15043 |
20 Jul 2020 @ 0650 |
--- |
CraigC |
650 pool crashed, 718 in overflow |
| 15040 |
19 Jul 2020 @ 1909 |
--- |
CraigC |
2nd 1927 to 1932.
3rd 1941 to 1947.
4th 1956 to 2002.
5th 2009 to 2017 |
| 15039 |
19 Jul 2020 @ 1753 |
--- |
CraigC |
started overflow |
| 14986 |
14 Jul 2020 @ 1715 |
--- |
CraigC |
already in overflow when I arrived |
| 14965 |
13 Jul 2020 @ 0524 |
13 Jul 2020 @ 0602 |
LynnS |
From 0524 until about 0600 Great Fountain was in the post-eruptive state where it periodically splashedup water without ejecting water from the crater (coning activity that does not reflect expenditure of energy and is not included in calculations of duration based prediction models), but had not quite entered the post-eruptive state where the pool fills to a few inches below overflow, then boils for awhile (stage 1 of Tomas Vachuda’s quiet period.)
About 0600 the coning started to turn to activity that looked more like boiling around the edges of and the pool level, although several inches below the rim, was visible (stage 1 of Vachuda’s quiet period). |
| 14894 |
06 Jul 2020 @ 1350 |
--- |
CraigC |
in overflow |
| 14889 |
05 Jul 2020 @ 1545 |
--- |
LynnS |
Already in overflow. |
| 14879 |
04 Jul 2020 @ 1845 |
--- |
CraigC |
in overflow |
| 14813 |
30 Jun 2020 @ 1305 |
--- |
User34 |
Seemed very close to overflow, or in early overflow |
| 14724 |
24 Jun 2020 @ 1350 |
--- |
William |
1st overflow |
| 14695 |
20 Jun 2020 @ 0549 |
--- |
LynnS |
Great Fountain in very early overflow; water has not yet started trickling off the first terrace. |
| 14657 |
17 Jun 2020 @ 1705 |
--- |
LynnS |
Not yet in overflow |
| 14638 |
14 Jun 2020 @ 1542 |
--- |
aferrara |
Fairly high water level ~1530 dropped ~1' below overflow |
| 14634 |
13 Jun 2020 @ 1645 |
--- |
William |
arrived to overflow with light circular boil. |
| 14605 |
11 Jun 2020 @ 1957 |
--- |
William |
first overflow |
| 14546 |
05 Jun 2020 @ 1250 |
--- |
RLJones |
no eruption yet as of 1250 |
| 14530 |
03 Jun 2020 @ 2230 |
--- |
William |
Still no overflow at 22:30 |
| 14236 |
25 May 2020 @ 1523 |
--- |
mhvogel |
Hey geyser enthusiasts. I went to Firehole Lake Drive this morning to retrieve the data logger eruptions times of Great Fountain. It stopped logging on April 28 so there is nearly a month of eruptions that is lost. I reconfigured the logger so as of 0940 it began logging again. I'll input the eruption times as soon as I can as it takes a long time to enter over a month's worth of data. This summer Old Faithful Park Rangers will not be predicting Great Fountain geyser. We will not be there every morning like we used to be and that's rather unfortunate. This is due to low staffing levels and operational needs. It is way beyond my control. |
| 13952 |
16 Oct 2019 @ 1546 |
--- |
Maureen |
Firehole Lake Drive has been closed since the whole park shut down last week and has NOT reopened. |
| 13951 |
16 Oct 2019 @ 1438 |
--- |
mhvogel |
After arduously reviewing the GF electronic data, it appears GF is going into a "wild phase". On 10/9 it was doing these small eruptions every from 0443-1622 every 20-30 minutes. On 10/10 more small eruptions every 20-30 minutes. On 10/11 and 10/12 not much of anything. On 10/13 and 10/14 GF began to have small eruptions again about every 30-60 minutes. I hope this helps. |
| 13991 |
14 Oct 2019 @ 1234 |
--- |
mhvogel |
After reviewing the great fountain graph, the wild phase period started on 10/9 and ended on the morning/afternoon of 10/14. |
| 13990 |
14 Oct 2019 @ 1224 |
--- |
mhvogel |
The geology department emailed me the Great Fountain electronic graph for 10/14-10/18. |
| 13901 |
07 Oct 2019 @ 1042 |
--- |
underarockphoto |
In full overflow |
| 13894 |
06 Oct 2019 @ 1120 |
--- |
cb |
overflow just starting on the 2nd tier. |
| 13873 |
04 Oct 2019 @ 1450 |
--- |
Maureen |
Overflow start. |
| 13861 |
04 Oct 2019 @ 0730 |
--- |
underarockphoto |
Five inches below overflow. |
| 13834 |
30 Sep 2019 @ 1247 |
--- |
Maureen |
The next eruption will be after 1500. |
| 13802 |
25 Sep 2019 @ 1219 |
--- |
Maureen |
Overflow start. |
| 13750 |
19 Sep 2019 @ 0815 |
--- |
Barbara Lasseter |
Heavy noisy boiling in crater sometimes reaching top of crater. Runoff channels holding water |
| 13715 |
16 Sep 2019 @ 0835 |
--- |
Barbara Lasseter |
First overflow |
| 13709 |
15 Sep 2019 @ 1919 |
--- |
William |
first overflow |
| 13699 |
15 Sep 2019 @ 0730 |
--- |
Barbara Lasseter |
First overflow |
| 13677 |
13 Sep 2019 @ 0745 |
--- |
Barbara Lasseter |
31 & foggy. No overflow. Audible boiling in the crater |
| 13669 |
12 Sep 2019 @ 1544 |
--- |
Maureen |
Overflow start |
| 13632 |
09 Sep 2019 @ 0710 |
--- |
Barbara Lasseter |
Mostly refilled. Still a little boiling at the edge |
| 13626 |
08 Sep 2019 @ 0707 |
--- |
Barbara Lasseter |
First overflow |
| 13623 |
07 Sep 2019 @ 2014 |
--- |
William |
no overflow by this time. |
| 13585 |
05 Sep 2019 @ 1312 |
--- |
William |
first overflow |
| 13541 |
04 Sep 2019 @ 1545 |
--- |
mhvogel |
One of co-workers told me the wrong overnight eruption time of GF. According to the Bluetooth download, the eruption time was 0440 which matches up with the dude that saw it at 0436. Sorry for the confusion. |
| 13546 |
04 Sep 2019 @ 1306 |
--- |
mdschwarz |
Not in overflow. Parking lot full. |
| 13496 |
01 Sep 2019 @ 1936 |
--- |
geysergaze |
Overflow 1936 |
| 13457 |
29 Aug 2019 @ 2029 |
--- |
steve |
Great Fountain was already in overflow. Start time unknown but the area of steaming water was still close to the main vent |
| 13448 |
29 Aug 2019 @ 0856 |
--- |
steve |
First overflow, after a quick rise. |
| 13440 |
28 Aug 2019 @ 0951 |
--- |
Maureen |
Overflow start. |
| 13369 |
23 Aug 2019 @ 1840 |
--- |
Maureen |
Overflow start. |
| 13360 |
23 Aug 2019 @ 0754 |
--- |
Maureen |
Overflow start. |
| 13352 |
22 Aug 2019 @ 1840 |
--- |
William |
had not reached overflow at this time |
| 13317 |
19 Aug 2019 @ 1135 |
--- |
Maureen |
Overflow start. |
| 13311 |
18 Aug 2019 @ 1508 |
--- |
Maureen |
Overflow start. |
| 13291 |
16 Aug 2019 @ 1634 |
--- |
William |
1st overflow |
| 13276 |
15 Aug 2019 @ 1812 |
--- |
William |
1st overflow |
| 13176 |
11 Aug 2019 @ 1945 |
--- |
minissa |
1-2" from overflow, did not stay to confirm OF |
| 13132 |
09 Aug 2019 @ 1356 |
09 Aug 2019 @ 1428 |
JSJ |
Inclinometer readings: highest water during 1st series about 81 feet; 2nd series about 59 feet; 3rd series about 45 feet. |
| 12820 |
27 Jul 2019 @ 0618 |
--- |
Barbara Lasseter |
Overflow 0618 |
| 12560 |
22 Jul 2019 @ 1117 |
--- |
Barbara Lasseter |
Not in overflow |
| 12521 |
19 Jul 2019 @ 0620 |
--- |
Barbara Lasseter |
Full to within 6-8inches of rim with low boil at north end |
| 12512 |
18 Jul 2019 @ 0630 |
--- |
Barbara Lasseter |
Deep boiling with water visible only at the peak of the most vigorous boils |
| 12500 |
16 Jul 2019 @ 0630 |
--- |
Barbara Lasseter |
Pool has refilled. Slight boil remains |
| 12481 |
14 Jul 2019 @ 0750 |
--- |
Barbara Lasseter |
Overflow 0750 |