| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 20129 |
26 Oct 2021 @ 1038 |
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DanS |
Active spouting from south vent. Water level low. Has brief pauses of about 5 seconds. |
| 17293 |
30 May 2021 @ 1209 |
--- |
JSJ |
Angled splashing-spouting from the southermost part of the basin. With pauses. Same behavior seen in the evening. Probably doing this all day. |
| 16217 |
20 Sep 2020 @ 0955 |
--- |
DanS |
Splashing 2 feet across pool. Pool low. |
| 12370 |
05 Jul 2019 @ 1754 |
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minissa |
Low agitated pool, water spurting vigorously diagonally across pool to a height of about a foot from crack-like vent on right side of pool. Wasn't sure if this was the eruption or just a vigorous refill, so listing it as a note |
| 11576 |
03 Jun 2019 @ 1752 |
--- |
JSJ |
Low pool. Angled, gurgling splashing from southern vent. Two peripheral/side vents quiet. |
| 8420 |
02 Jun 2018 @ 1013 |
--- |
JSJ |
Very low water, but visible. Down ~1 meter from "normal" level. Auxiliary vents quiet. |
| 6493 |
16 Sep 2017 @ 0714 |
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TSBryan |
Activity about the same as seen yesterday, except perhaps less vigor in Gemini. |
| 6403 |
15 Sep 2017 @ 1120 |
--- |
TSBryan |
Pebble water level down 2 inches, adjacent vent quiet, Gemini spitting from high vent formed steaming puddle. |
| 6404 |
15 Sep 2017 @ 1100 |
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TSBryan |
Pebble bubbling (not boiling), small vent just north of Pebble noisily sputtering water to several inches, patch nearer road sizzling, and Gemini gurgling and intermittently gushing steam. |
| 4181 |
02 Jun 2017 @ 1519 |
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JSJ |
Pebble Geyser had a decent water level. Basin floor is gray. Water was clear and hot (188° Fahrenheit - thermal camera reading). Occasional surging from southern part of vent. |
| 3814 |
26 Oct 2016 @ 1730 |
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DanS |
Minor splashing from South vent but much less energy than during AM. |
| 3248 |
07 Jul 2016 @ 2020 |
07 Jul 2016 @ 2115 |
JSJ |
Pebble Geyser at moderately low pool level with clearish-gray water. Splashing (with brief pauses) from southern vent. Occasional splashing from eastern vent. Hissing from northeastern auxiliary vent. Gentle passive steaming from western auxiliary vent. |
| 1886 |
11 Jul 2015 @ 1919 |
11 Jul 2015 @ 1929 |
JSJ |
Pebble Geyser started overflow from a full pool/basin at 1919. The overflow reached the dropoff toward Cave Spring by 1923. Runoff reached Cave Spring at 1927. Overflow reduced to a trickle by 1928. Overflow ceased at 1929 and pool level slowly decreased. A Gemini Geyser series followed. |
| 1883 |
10 Jul 2015 @ 1828 |
10 Jul 2015 @ 2115 |
JSJ |
Pebble Geyser at high water level at 1828, with both auxiliary vents submerged. Overflow to Cave Spring at 1958. Overflow at a trickle by 2033. Almost no overflow at 2040. Decent overflow resumed at 2043. Still overflowing into Cave Spring at 2115 when I left. No Gemini series observed. |
| 1875 |
09 Jul 2015 @ 1519 |
09 Jul 2015 @ 1915 |
JSJ |
Pebble Geyser's pool level slowly increased from 1519 to 1800. Overflow into Cave Spring at 1803. Overflow ceased at 1815 as pool level decreased. Adjacent Gemini Geyser started an eruption series at 1820. |
| 1370 |
05 Aug 2007 @ 0900 |
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BoekelUpload |
9:00 not in overflow |
| 1369 |
04 Aug 2007 @ 0000 |
04 Aug 2007 @ 2359 |
BoekelUpload |
in overflow |
| 1368 |
27 Jul 2007 @ 0000 |
27 Jul 2007 @ 2359 |
BoekelUpload |
in overflow; Crack marker in place |
| 1367 |
19 Jul 2007 @ 0000 |
19 Jul 2007 @ 2359 |
BoekelUpload |
in overflow; Crack marker replaced |
| 1366 |
16 Jul 2007 @ 0000 |
16 Jul 2007 @ 2359 |
BoekelUpload |
in overflow; Crack marker in place |
| 12342 |
29 Oct 1993 @ 1300 |
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JarnoO |
in Lower Basin; is empty |