| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 37457 |
09 Oct 2024 @ 1140 |
--- |
mrsteed |
no longer erupting |
| 36549 |
25 Aug 2024 @ 1723 |
25 Aug 2024 @ 1946 |
BrianR |
17:23 First Splash seen after Grotto marathon
17:52 first pressure pool
18:20 second
18:48 third
19:17 fourth, first reasonable boil from fountain
19:46 fifth
Left area probably 2 to 3 cycles to go before eruption |
| 36238 |
03 Aug 2024 @ 0617 |
--- |
CraigC |
splashing, pressure pool full |
| 35673 |
02 Jul 2024 @ 1015 |
--- |
RMichaels |
Grotto Fountain boiled up at the start of Grotto but did not erupt. |
| 35606 |
28 Jun 2024 @ 2030 |
--- |
BrianR |
Splashing but no pressure pools yet, leaving area |
| 28813 |
15 Oct 2023 @ 1158 |
--- |
Ben VL |
Pressure pool up & drop. |
| 27023 |
12 Jul 2023 @ 1836 |
--- |
Ben VL |
Pressure pool up and dropped. Not sure how many there have been. |
| 26342 |
15 Jun 2023 @ 1405 |
--- |
Graham |
1405 Small boil. Pressure Pool low.
Also 1434, 1446, break, 1528 high water, good boil, 1546 weak, 1609 strong, almost started, 1643 weak, 1656 |
| 25583 |
20 May 2023 @ 1305 |
--- |
Brando |
boiling ~8 inches |
| 24286 |
06 Oct 2022 @ 1227 |
--- |
DanS |
In overflow |
| 23474 |
29 Aug 2022 @ 0959 |
--- |
Art |
Started erupting 3-4’ then stopped after 3 minutes. |
| 21722 |
04 Jun 2022 @ 1346 |
--- |
Graham |
Pressure Pool up and small boil. Again 1403, 1414, 1427, 1439, 1447 and GF boiling steadily. 1451 rise and boil continues. 1457 GF erupted. 10m of boiling before it committed to an eruption. |
| 21551 |
28 May 2022 @ 1149 |
--- |
Graham |
Pressure pool up but not full. No boiling in GF. Also 1204, 1211. 1223 up and full. Also 1235, 1250, 1304, 1315, 1326, 1338. 1340 small boil d=3m. |
| 19826 |
01 Oct 2021 @ 1317 |
--- |
SteveO |
Grotto Fountain bubbling a little bit, 1 st visible in the Pressure Pool. |
| 19770 |
28 Sep 2021 @ 1513 |
--- |
Kitt B |
Pressure pool is up and dropped at 1515. |
| 19508 |
12 Sep 2021 @ 1108 |
--- |
Graham |
End 1108 |
| 19477 |
11 Sep 2021 @ 1400 |
11 Sep 2021 @ 1410 |
aferrara |
1-1.5' boil in lead up to Grotto that did not result in an eruption of GF |
| 19260 |
03 Sep 2021 @ 1633 |
--- |
Brian |
Tried to start, jetting began to perhaps 4’ max, then died as Grotto started |
| 18571 |
22 Jul 2021 @ 0950 |
--- |
SteveO |
5th Pressure Pool up with boiling in Grotto Fountian. |
| 18570 |
22 Jul 2021 @ 0913 |
22 Jul 2021 @ 0917 |
SteveO |
4th Pressure Pool up with boiling 3 to 4 feet in Grotto Fountian. Pressure Pool dropped 0917. |
| 18569 |
22 Jul 2021 @ 0833 |
22 Jul 2021 @ 0836 |
SteveO |
3rd Pressure Pool up with boiling in Grotto Fountain. Pressure Pool dropped at 0836 |
| 18568 |
22 Jul 2021 @ 0803 |
22 Jul 2021 @ 0805 |
SteveO |
2nd Pressure Pool up with Grotto Fountian boil. Pressure Pool dropping at 0805. |
| 18593 |
22 Jul 2021 @ 0728 |
22 Jul 2021 @ 0729 |
BrianR |
First Pressure Poor up with fountain boil |
| 18592 |
22 Jul 2021 @ 0701 |
--- |
BrianR |
First appearance of water after Grotto marathon |
| 18794 |
20 Jul 2021 @ 1511 |
20 Jul 2021 @ 1538 |
BrianR |
Grotto Fountain:
First heard water boiling: 15:11
No visible water/boiling before Grotto eruption
Pressure Pool up:
15:30-15:31 |
| 18791 |
20 Jul 2021 @ 0818 |
20 Jul 2021 @ 0916 |
BrianR |
Grotto Fountain:
First heard water boiling 8:18
Visible water/boiling:
9:01
Pressure Pool up:
9:15-9:16 |
| 18776 |
18 Jul 2021 @ 1623 |
18 Jul 2021 @ 1737 |
BrianR |
First heard water boiling: 16:23
Pressure Pool up:
17:29-17:30
17:34-17:37
Visible water/boiling:
17:28-17:30
17:33-17:36
Did not erupt |
| 18775 |
18 Jul 2021 @ 1230 |
18 Jul 2021 @ 1321 |
BrianR |
First heard water boiling: 12:30
Visible water/boiling
13:16
Did not erupt |
| 18772 |
18 Jul 2021 @ 0619 |
18 Jul 2021 @ 0826 |
BrianR |
Hear water boiling 6:19
Pressure Pool up:
6:35-6:39
7:28-7:42
8:11-8:26
Visible water/boiling
6:21-7:42
8:14-8:26
Did not erupt |
| 18069 |
24 Jun 2021 @ 0850 |
24 Jun 2021 @ 0856 |
CrisG |
pressure pool up. low splashing from cone. pool dropped by 0905. |
| 17770 |
14 Jun 2021 @ 1235 |
--- |
CraigC |
pressure pool up, Grotto Ftn built up to about 5 foot bursting that collapsed after Grotto started |
| 17769 |
14 Jun 2021 @ 1225 |
--- |
CraigC |
pressure pool up, light spitting in GF |
| 17747 |
13 Jun 2021 @ 1352 |
--- |
CraigC |
pressure pool up |
| 17746 |
13 Jun 2021 @ 1317 |
--- |
CraigC |
pressure pool up |
| 17745 |
13 Jun 2021 @ 1220 |
--- |
CraigC |
pressure pool up |
| 17716 |
12 Jun 2021 @ 1654 |
--- |
CraigC |
pressure pool up |
| 17705 |
12 Jun 2021 @ 1313 |
--- |
CraigC |
pressure pool up |
| 17704 |
12 Jun 2021 @ 1258 |
--- |
CraigC |
pool has not dropped, completely full now |
| 17703 |
12 Jun 2021 @ 1120 |
--- |
CraigC |
pressure pool up |
| 17700 |
12 Jun 2021 @ 1048 |
--- |
CraigC |
water spitting up a few inches, 1053 water visible in pressure pool about 4 inches below top |
| 17695 |
12 Jun 2021 @ 1000 |
--- |
CraigC |
pressure pool up |
| 17669 |
11 Jun 2021 @ 1117 |
--- |
CraigC |
pressure pool up |
| 17668 |
11 Jun 2021 @ 1106 |
--- |
CraigC |
pressure pool up, right back down, low energy |
| 17666 |
11 Jun 2021 @ 1033 |
--- |
CraigC |
pressure pool up, strong boil from Grotto Fountain |
| 17664 |
11 Jun 2021 @ 0952 |
--- |
CraigC |
pressure pool up, strong 2 foot boil in Grotto Fountain |
| 17662 |
11 Jun 2021 @ 0910 |
--- |
CraigC |
pressure pool up |
| 17658 |
11 Jun 2021 @ 0830 |
--- |
CraigC |
pressure pool up |
| 17656 |
11 Jun 2021 @ 0752 |
--- |
CraigC |
pressure pool up |
| 17611 |
09 Jun 2021 @ 1401 |
--- |
CraigC |
pressure pool up |
| 17610 |
09 Jun 2021 @ 1320 |
--- |
CraigC |
pressure pool up |
| 17609 |
09 Jun 2021 @ 1309 |
--- |
CraigC |
pressure pool up |
| 17608 |
09 Jun 2021 @ 1254 |
--- |
CraigC |
pressure pool up |
| 17607 |
09 Jun 2021 @ 1247 |
--- |
CraigC |
pressure pool up |
| 17606 |
09 Jun 2021 @ 1157 |
--- |
CraigC |
pressure pool up |
| 17605 |
09 Jun 2021 @ 1122 |
--- |
CraigC |
pressure pool up |
| 17597 |
09 Jun 2021 @ 0708 |
--- |
CraigC |
water up in pressure pool, bubbling in Grotto Fountain |
| 17595 |
09 Jun 2021 @ 0646 |
--- |
CraigC |
brief spitting |
| 17560 |
07 Jun 2021 @ 1435 |
--- |
CraigC |
pressure pool up |
| 17559 |
07 Jun 2021 @ 1350 |
--- |
CraigC |
pressure pool up |
| 17558 |
07 Jun 2021 @ 1304 |
--- |
CraigC |
pressure pool up |
| 17475 |
05 Jun 2021 @ 1226 |
--- |
CraigC |
pressure pool up |
| 17431 |
04 Jun 2021 @ 1218 |
--- |
CraigC |
pressure pool up |
| 17430 |
04 Jun 2021 @ 1203 |
--- |
CraigC |
pressure pool up, splashing in Grotto Geyser |
| 16937 |
28 Apr 2021 @ 0915 |
--- |
CraigC |
Pressure pool up, small bubbling from GF |
| 16934 |
27 Apr 2021 @ 1401 |
--- |
CraigC |
Pressure pool up, dropped after entry, then back up at 1405, GF began small bubbling. |
| 16926 |
26 Apr 2021 @ 1155 |
--- |
CraigC |
Pressure pool up, GF spouting for 5 mins then dropped |
| 16925 |
26 Apr 2021 @ 1116 |
--- |
CraigC |
pressure pool full, GF spouting 3 to 4 feet variable for 5 mins before collapsing |
| 16086 |
12 Sep 2020 @ 1352 |
--- |
CraigC |
pressure pool up |
| 16085 |
12 Sep 2020 @ 1305 |
--- |
CraigC |
pressure pool up |
| 16065 |
11 Sep 2020 @ 1534 |
--- |
CraigC |
pressure pool is full |
| 15951 |
04 Sep 2020 @ 1003 |
--- |
TheHikingDude |
pool empty |
| 15929 |
02 Sep 2020 @ 0811 |
--- |
CraigC |
pressure pool up, small bubbling in GF |
| 15912 |
31 Aug 2020 @ 1201 |
--- |
CraigC |
pressure pool rising.
1202 bursting in GF |
| 15910 |
31 Aug 2020 @ 1122 |
--- |
CraigC |
pressure pool up, then fell, small bursting from GF |
| 15909 |
31 Aug 2020 @ 1040 |
--- |
CraigC |
pressure pool up, just dropped. small bubbling from gf |
| 15719 |
23 Aug 2020 @ 1247 |
23 Aug 2020 @ 1413 |
BrianR |
Overflowed water at various times in buildup to Grotto eruption, but never boiled. Pressure Pool had visible water ~ 95% of this time frame. This and South Grotto Fountain series of eruptions was due to Spa having a flowing runoff channel to the river and all three of its vents bubbling (I.e., it was trying to start at the same time as Grotto). Also Grotto Central Vents were active in this time frame when South Grotto Fountain was not erupting.
Demetri will provide notes on Startling during this time frame |
| 13539 |
04 Sep 2019 @ 1224 |
--- |
c.barwin |
end time |
| 12835 |
28 Jul 2019 @ 0938 |
--- |
rbwhitaker |
Got over two feet tall then backed down to nothing |
| 12033 |
29 Jun 2019 @ 1454 |
--- |
Polly |
Wet around Grotto Fountain. |
| 11992 |
27 Jun 2019 @ 1712 |
27 Jun 2019 @ 2007 |
BrianR |
After aborted eruption, the Grotto system went into a stalled pattern. Grotto Fountain was in a continuous boil up to 2 ft ( mostly 1 ft and under) from 17:49 to 19:28, 19:34 to 1943, and 19:51 to 19:58. The “pressure pool” was rising and falling just barely in and out of view from 17:20 to 18:51, then staying always in view until Grotto Fountain finally erupted at 20:09. Grotto was silent except for three one minute grumbles during this time. All Spa vents were off and the pool rose only 3 inches during this time. |
| 11991 |
27 Jun 2019 @ 1708 |
27 Jun 2019 @ 1711 |
BrianR |
6 to 10 ft eruption aborted, no Grotto |
| 11336 |
23 May 2019 @ 1420 |
23 May 2019 @ 1521 |
Kyle |
as pressure pool rose and dropped Grotto Fountain bubbled/boiled to a height just above the height of it's cone for brief periods when the pressure pool was full and would stop when pressure pool level dropped |
| 11264 |
18 May 2019 @ 1348 |
--- |
Mkeller |
Repeat of what happened at 12:56 |
| 11265 |
18 May 2019 @ 1256 |
--- |
Mkeller |
Erupted to 3-4 feet for about 3 minutes. Grotto tried to start. Central Vents erupted instead. |
| 8982 |
25 Jun 2018 @ 1559 |
--- |
BrianR |
“Pressure Pool” up at 15:59 through 16:06, 263 minutes after last Grotto. Grotto Fountain water to 3 ft at 16:01, no eruption prior to Grotto |
| 8981 |
25 Jun 2018 @ 1527 |
--- |
BrianR |
“Pressure Pool” up at 15:27 through 15:31 no Grotto Fountain water. 231 minutes after last Grotto |
| 8980 |
24 Jun 2018 @ 1523 |
--- |
BrianR |
“Pressure Pool” up 15:23 through 15:26, no Grotto Fountain water. 262 minutes after last Grotto |
| 7047 |
23 Sep 2017 @ 1600 |
23 Sep 2017 @ 1606 |
Polly |
Bubbles increasing to ~6 inches steady, then off 1606. |
| 3517 |
20 Aug 2016 @ 1931 |
--- |
Kitt B |
Grotto Fountain ended at 1931 |
| 2533 |
11 Oct 2015 @ 1223 |
--- |
Siegmund |
Bubbling vigorously 1223; boiling hard 1228-1231, but never got more than ~30cm high |
| 2151 |
14 Aug 2015 @ 1312 |
--- |
JSJ |
Blipping at 1312 (Grotto & Rocket started at 1314). |
| 1656 |
28 May 2015 @ 1448 |
--- |
mhreed |
Saw two distinct steam clouds from F&M. By the time I walked up to the Grotto area, Grotto Fountain was at 10 ft. and dying down. Not sure if missed or aborted eruption. |
| 1612 |
19 May 2015 @ 1347 |
19 May 2015 @ 1358 |
JSJ |
Intermittent small blipping to very low spouting from 1347 to 1358. No more after Grotto Geyser eruption start at 1358. |
| 1005 |
29 Aug 2008 @ 0000 |
29 Aug 2008 @ 2359 |
BoekelUpload |
|
| 1352 |
09 Jun 2007 @ 0900 |
09 Jun 2007 @ 0909 |
BoekelUpload |
9:0x |
| 3879 |
03 Jul 2006 @ 0700 |
03 Jul 2006 @ 1545 |
Tara |
Grotto Fountain had been having periodic boiling episodes since sometime before 0700. These episodes alternated with eruptions by South Grotto Fountain. There were three stronger episodes at 0711, 1100, and 1400. These occurred midway between hourly Giant hot periods. When Grotto Fountain finally did erupt, it was weak and lasted only 5 minutes, but Grotto did follow at 1548. |
| 15329 |
19 Nov 1996 @ 1103 |
--- |
JarnoO |
overflowing heavily ~15-20 gpm |