| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 19966 |
12 Oct 2021 @ 1608 |
--- |
Ben VL |
Kind of a large boil going on when I walked by. Left side of the pool to 5 or 6 inches. Died down after a bit. |
| 19652 |
19 Sep 2021 @ 1414 |
--- |
Tara |
intermittent boiling on north end of pool |
| 16495 |
31 Oct 2020 @ 1127 |
--- |
Janet Jones |
1 ft boil from “front left” vent. D= 15-20 seconds.0 |
| 15741 |
26 Aug 2020 @ 1335 |
--- |
Janet Jones |
Ear Spring had a fresh runoff channel carved almost directly opposite of the spring on the boardwalk. Looked like it could have been from this morning. The other runoff channels looked like they have for some time. |
| 14551 |
05 Jun 2020 @ 2001 |
--- |
William |
vigorous boil from 2 points along from rim of pool. hottest I have seen it this year. |
| 14242 |
26 May 2020 @ 1116 |
--- |
Janet Jones |
Bubbling from the center of the pool in a line. |
| 13908 |
09 Oct 2019 @ 1401 |
--- |
underarockphoto |
No snow within three feet. Small runoff rivulets behind it. |
| 10729 |
05 Nov 2018 @ 1322 |
--- |
mhreed |
Two foot surge for ~20s. |
| 10589 |
08 Oct 2018 @ 1113 |
--- |
Micah Kipple |
Surge to 2 feet |
| 10518 |
01 Oct 2018 @ 1643 |
--- |
Micah Kipple |
2' surge from the center of the pool. |
| 10313 |
20 Sep 2018 @ 1821 |
--- |
Betty |
Large boil for about 15 seconds as seen from the barrier at Arrowhead Spring |
| 10283 |
18 Sep 2018 @ 0945 |
--- |
Micah Kipple |
Frequent surging minor eruptions 2-3' high from left front vent. Righthand vent in constant state of superheated boiling from flat to 2' |
| 10252 |
16 Sep 2018 @ 0734 |
--- |
steve |
One piece of the sinter rim about 4X8 inches washed off during a strong boil. |
| 10250 |
16 Sep 2018 @ 0719 |
--- |
steve |
Two peices of the sinter rim on the north edge are loose and may wash away. |
| 10242 |
16 Sep 2018 @ 0637 |
--- |
steve |
No major eruption overnight. Still heavy bioling, occasionly to 2-3 feet. Overall the whole area on the west side of the hill looks like it did last night |
| 10231 |
15 Sep 2018 @ 2156 |
--- |
Micah Kipple |
Cycling rapidly from 1-2 inches below ovf to sheeting heavy overflow accompanied by violent superheated boiling from two vents. The lefthand vent can reach up to 4 feet. |
| 9499 |
06 Aug 2018 @ 1842 |
--- |
Micah Kipple |
Gravel washed to the boardwalk. Fresh runoff channels. |
| 8366 |
30 May 2018 @ 1157 |
--- |
Janet Jones |
Nearly all microbes have been killed in the runoff channels. They’ve also been greatly reduced in Pendant Spring. |
| 4505 |
19 Jul 2017 @ 1238 |
--- |
Janet Jones |
Ear Spring is significantly hotter than it was on my last visit (think that was on 11 July 2017). There's also a seep that's active along the "front left" edge (as you face it on the boardwalk). I watched sustained boiling in the center of the pool that lasted 30 seconds or so. |
| 3860 |
05 Nov 2016 @ 1117 |
--- |
Janet Jones |
Area between the section of Ear Spring that normally bubbles along the edge and the boardwalk was wet out to about a foot. This is not in the normal overflow channel for Ear. |
| 3179 |
22 Jun 2016 @ 0935 |
--- |
David |
Spring boiling from lower right corner (vent area being upper right corner) as viewed from bw. see: https://www.flickr.com/photos/ujelang/27942211472/in/dateposted-public/ |
| 3371 |
11 Jun 2016 @ 1212 |
--- |
JSJ |
Thermal photography of pool recorded 190° F. |
| 1124 |
04 Aug 2014 @ 0000 |
04 Aug 2014 @ 2359 |
mhreed |
Activity seemed slightly more vigorous than usual. |