| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 19672 |
21 Sep 2021 @ 0706 |
--- |
Art |
In overflow already when we arrived at 0730, possibly starting at 0706 per others. |
| 19659 |
19 Sep 2021 @ 1835 |
--- |
Graham |
Not in overflow yet but close. |
| 19514 |
12 Sep 2021 @ 1432 |
--- |
steve |
First overflow |
| 19480 |
11 Sep 2021 @ 1332 |
--- |
steve |
First overflow. |
| 19358 |
07 Sep 2021 @ 1133 |
--- |
steve |
First overflow that held. There was an earlier overflow with a crash. |
| 19247 |
02 Sep 2021 @ 1210 |
--- |
Barbara Lasseter |
Start of overflow |
| 19126 |
28 Aug 2021 @ 1226 |
--- |
JeffL |
in overflow |
| 19087 |
26 Aug 2021 @ 1247 |
--- |
Micah Kipple |
In overflow |
| 19056 |
25 Aug 2021 @ 1221 |
--- |
minissa |
Of at 1221 |
| 19031 |
23 Aug 2021 @ 2107 |
--- |
steve |
It’s hard to tell by headlights, but this may be the time of first overflow. |
| 19012 |
23 Aug 2021 @ 0946 |
--- |
steve |
First overflow 0946, prediction of about 1106 |
| 18981 |
21 Aug 2021 @ 1325 |
--- |
minissa |
Arrived late for initial burst but later bursts {I'm thinking 3rd and esp 4th} had excellent height, volume and energy with one very nice blue bubble |
| 18971 |
21 Aug 2021 @ 0300 |
--- |
LynnS |
Eruption had completely finished. |
| 18960 |
18 Aug 2021 @ 1806 |
18 Aug 2021 @ 1818 |
minissa |
Pool not quite to overflow and still rising when we left |
| 18890 |
10 Aug 2021 @ 1627 |
--- |
User34 |
Overflow reachieved |
| 18888 |
10 Aug 2021 @ 1600 |
--- |
aferrara |
After about 30 minutes in weak overflow, pool dropped ~1.5'. Out of overflow. |
| 18889 |
10 Aug 2021 @ 1529 |
--- |
User34 |
First overflow, started crashing at 1600-1605 |
| 18829 |
04 Aug 2021 @ 1035 |
--- |
LynnS |
Start of overflow |
| 18815 |
03 Aug 2021 @ 0948 |
--- |
LynnS |
Start of overflow |
| 18806 |
02 Aug 2021 @ 1900 |
02 Aug 2021 @ 1930 |
aferrara |
Water still 1' below overflow, rising very slightly over range of observation. |
| 18773 |
01 Aug 2021 @ 0930 |
--- |
User34 |
First overflow |
| 18759 |
31 Jul 2021 @ 1006 |
--- |
LynnS |
Start of overflow |
| 18744 |
30 Jul 2021 @ 1302 |
--- |
LynnS |
Into overflow |
| 18729 |
29 Jul 2021 @ 1252 |
--- |
LynnS |
Start of overflow |
| 18707 |
28 Jul 2021 @ 1449 |
--- |
LynnS |
Overflow start |
| 18706 |
28 Jul 2021 @ 1408 |
--- |
LynnS |
Overflowed briefly, then crashed |
| 18688 |
27 Jul 2021 @ 1434 |
--- |
LynnS |
Start of overflow |
| 18659 |
25 Jul 2021 @ 1424 |
--- |
LynnS |
Start of overflow |
| 18655 |
25 Jul 2021 @ 0743 |
--- |
LynnS |
Still in post-eruptive audible boiling stage. Water level has dropped such that boiling is not visible while standing on the boardwalk. |
| 18635 |
24 Jul 2021 @ 1324 |
--- |
LynnS |
Start of oberflow |
| 18612 |
23 Jul 2021 @ 1403 |
--- |
LynnS |
Start of overflow |
| 18611 |
23 Jul 2021 @ 1317 |
--- |
LynnS |
Pool rose close to overflow 1317 then crashed out of sight. |
| 18610 |
23 Jul 2021 @ 1241 |
--- |
LynnS |
Pool rose to just slightly below overflow. Pool dropped several inches but did not crash 1254. |
| 18591 |
22 Jul 2021 @ 1530 |
--- |
LynnS |
Not yet in overflow |
| 18590 |
22 Jul 2021 @ 0545 |
--- |
Barbara Lasseter |
In overflow. Trickling over outer terrace. |
| 18562 |
21 Jul 2021 @ 0605 |
--- |
Barbara Lasseter |
Not in overflow |
| 18546 |
20 Jul 2021 @ 0701 |
--- |
steve |
In overflow when I pulled up but only a small amount of the first terrace is steaming. I left a minute later to check on Pink Cone so no guarantee it stayed in overflow. |
| 18548 |
20 Jul 2021 @ 0615 |
--- |
Barbara Lasseter |
Not in overflow |
| 18545 |
19 Jul 2021 @ 1814 |
--- |
steve |
First overflow |
| 18498 |
18 Jul 2021 @ 0944 |
--- |
steve |
First overflow. |
| 18497 |
17 Jul 2021 @ 2146 |
--- |
steve |
In overflow, but I didn’t stop to find out when it started |
| 18471 |
17 Jul 2021 @ 0926 |
--- |
steve |
First overflow, prediction 1050 |
| 18448 |
16 Jul 2021 @ 0926 |
--- |
steve |
First overflow. Predicted time for Great Fountain 1050 |
| 18436 |
15 Jul 2021 @ 1022 |
--- |
steve |
First overflow |
| 18347 |
11 Jul 2021 @ 0553 |
--- |
User34 |
In overflow |
| 18344 |
10 Jul 2021 @ 1345 |
--- |
Barbara Lasseter |
Not yet in overflow |
| 18147 |
28 Jun 2021 @ 0500 |
--- |
LynnS |
In audible, light boiling overflow; not in overflow at 0400 |
| 18056 |
23 Jun 2021 @ 0810 |
--- |
LynnS |
Already in overflow |
| 17919 |
19 Jun 2021 @ 1030 |
--- |
LynnS |
Already in audible overflow |
| 17807 |
15 Jun 2021 @ 0555 |
--- |
LynnS |
Already in overflow |
| 17759 |
13 Jun 2021 @ 1943 |
--- |
William |
in overflow upon first observation. best guess is 10-15m into overflow. |
| 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 |