| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 16489 |
30 Oct 2020 @ 1245 |
--- |
steve |
Custer is boiling strong with good overflow. |
| 16485 |
29 Oct 2020 @ 1752 |
--- |
MAB |
In overflow east and west. Too steamy to see southward |
| 16480 |
29 Oct 2020 @ 0939 |
--- |
MAB |
1.5 ft below the scallops. Too steamy to see but I heard bubbles breaking |
| 16457 |
26 Oct 2020 @ 1217 |
--- |
markwolf |
still low today |
| 16429 |
15 Oct 2020 @ 1130 |
--- |
markwolf |
still very low (not visible from boardwalk) and very little steam on this chilly day. |
| 16409 |
11 Oct 2020 @ 1905 |
--- |
cb |
5D22H PE. Pool has dropped a little. Water is lapping at just below the scalloped edges of the pool. Overflowing out the established runoff channel to the south and a bit out the backside. Runoff channel toward Veteran is trickling into the catch basin but not any further. |
| 16401 |
10 Oct 2020 @ 1243 |
--- |
cb |
pool is high and covering the scalloped edges. Overflowing on all sides and filling catch basins in front of the boardwalk, to the West, flowing into the muddy pool and a heavy flow out of the established runoff channel to the south. (like a river!) It has a mediocre boil. |
| 16366 |
08 Oct 2020 @ 1022 |
--- |
bbev |
2D, 13hrs PSBE: 24-30" below overflow. |
| 16362 |
07 Oct 2020 @ 1835 |
--- |
cb |
. Cistern spring is filling. Water is ~6' below the rim of the inner tube. (cave in the tube to the south) water is clear and it has a vigorous boil. |
| 16357 |
07 Oct 2020 @ 0905 |
--- |
cb |
1D12H PE. Cistern Spring is beginning to refill. |
| 16353 |
06 Oct 2020 @ 1018 |
06 Oct 2020 @ 1610 |
cb |
@ 1018 (13H15M) into the eruption. Cistern Spring is down ~1.5' below the inner tube rim. It is calm, steamy and blue!
@1149 Cistern Spring is down 2' from rim of inner tube.
@1551 (19 H) Cistern Spring is empty of all visable water. |
| 16335 |
05 Oct 2020 @ 0815 |
05 Oct 2020 @ 1915 |
cb |
9D9H PE. Cistern Spring is overflowing to the south and backside with a vigorous blooping boil. |
| 16325 |
03 Oct 2020 @ 0930 |
03 Oct 2020 @ 1930 |
cb |
7D9H PE. Cistern spring is low again like last interval. Only overflowing out the established channel toward the south. It has a very vigorous blooping boil 3 - 5". |
| 16318 |
02 Oct 2020 @ 0930 |
--- |
cb |
5D23H PE. Cistern Spring is overflowing out the established runoff to the south, minimally out the back side and to the west. |
| 16309 |
29 Sep 2020 @ 1835 |
--- |
cb |
3D8H PE. Cistern Spring is barely overflowing on the south, west and backside. There is a trickle of water approaching the muddy pool. It's mainly overflowing out the established channel to the south. It has a mediocre boil. |
| 16297 |
28 Sep 2020 @ 1418 |
--- |
bbev |
Heavy boil now just visible from boardwalk in front of spring, 5-6' below rim of inner tube. Up maybe 1' from 6 hours ago. |
| 16296 |
28 Sep 2020 @ 0840 |
--- |
bbev |
1D, 22hrs PSBE; Cistern also steamy. Can hear water and only able to see vigorous boiling by standing on middle rail in front of the spring. |
| 16293 |
27 Sep 2020 @ 1855 |
--- |
Ajw |
Pool is completely drained. Only a faint hint of steam from crater. |
| 16292 |
27 Sep 2020 @ 1605 |
--- |
cb |
1D 5.5H PE. Cistern Spring has completely drained. No sounds or steam on this chilly fall day! |
| 16276 |
26 Sep 2020 @ 1650 |
--- |
cb |
6H15M into the eruption CS pool has dropped 2' below overflow. pool is calm, clear and no boil. |
| 16262 |
26 Sep 2020 @ 1147 |
--- |
cb |
1H 12M in CS has dropped just 1" and is no longer overflowing from the south channel. platform mostly dry |
| 16264 |
26 Sep 2020 @ 0800 |
--- |
DanS |
Reported that Cistern was higher this AM prior to SB eruption. |
| 16254 |
25 Sep 2020 @ 0830 |
25 Sep 2020 @ 1745 |
cb |
Cistern Spring is still VERY low and overflowing only out of the established channel to the south. The scalloped edges and biscuits are WAY exposed. (1.5") Very chilly and windy day. |
| 16248 |
24 Sep 2020 @ 0730 |
24 Sep 2020 @ 1900 |
cb |
Cistern Spring water level is very low. It is only overflowing from the established channels to the south and on the backside. Most of the platform is dry where is is normally wet with overflow. Scalloped edges and biscuits around the edge of the pool are exposed. hum.... |
| 16191 |
19 Sep 2020 @ 0915 |
--- |
cb |
2D21.5H PE. Cistern Spring is overflowing to the south, backside and into the muddy pool but not toward Veteran. (looks to be in early overflow.) |
| 16115 |
13 Sep 2020 @ 1800 |
--- |
cb |
Cistern Spring is the same as this morning. |
| 16088 |
12 Sep 2020 @ 1125 |
--- |
cb |
2D20.5H PE. Cistern Spring is in overflow on all sides with a moderate boil. |
| 16052 |
11 Sep 2020 @ 0850 |
--- |
cb |
1D17H PE. Cistern Spring is rising. Just starting to refill. water level still WAY down in the tube. Not visable because of steam and water depth so far down in the tube but I can hear the boil. |
| 16045 |
06 Sep 2020 @ 0721 |
08 Sep 2020 @ 2121 |
underarockphoto |
With the exception of 17:30 Monday to 11:30 Tuesday. Cistern was generally calm with a lgith boil. Overflow on Sunday morning was heavy on three sides, dropping to just one overflow (back channel) point in the afternoon. Cistern slowly rose back to heavier overflow on two sides with slightly increased boiling Monday morning and dropped again (about a half inch) Tuesday through the afternoon while boiling stayed generally high. |
| 15987 |
05 Sep 2020 @ 1914 |
--- |
cb |
3D22h40M PE. Cistern Spring is overflowing on all sides with a weak (flooded) boil. |
| 15962 |
04 Sep 2020 @ 1934 |
--- |
cb |
2D23H PE. Cistern Spring is overflowing on all sides. |
| 15943 |
03 Sep 2020 @ 1834 |
--- |
cb |
1D22H PE. Cistern Spring is filling and the water level ~1.5' below the inner tube rim. It has a 1 point blue-ping :) (blooping) boil! |
| 15897 |
30 Aug 2020 @ 1025 |
--- |
cb |
3D16.5H PE. Cistern Spring is overflowing on all sides with a vigorous boil. It is an opalescent turquoise blue color. |
| 15796 |
29 Aug 2020 @ 1336 |
--- |
cb |
2D19H PE. CS is overflowing on the south end (toward Echinis) and over the backside. Just BARELY a trickle over NW side (toward Veteran). Pool is clear blue in color with a moderate boil. |
| 15765 |
28 Aug 2020 @ 1136 |
--- |
cb |
1D18H PE. Cistern Spring is on the rise. water level is not visable yet, (~9' below the rim of the inner tube.) It is very steamy and has an audible roiling, vigorous boil that is putting up an impressive steam cloud. |
| 15684 |
22 Aug 2020 @ 1555 |
--- |
cb |
2D13H PE. Cistern Spring is in overflow with a weak boil |
| 15661 |
20 Aug 2020 @ 1731 |
--- |
cb |
14H 32M PE. Spring's pool is down ~1.5' from the rim of the inner tube. The pool is calm and a opalescent steel blue color. |
| 15631 |
17 Aug 2020 @ 1933 |
--- |
cb |
3D4H PE. Cistern Spring is overflowing in all directions with a vigorous boil |
| 15613 |
16 Aug 2020 @ 1856 |
--- |
cb |
2D 3.5H PE. Cistern Spring is in overflow with average boil and it is a cloudy turquoise color. |
| 15614 |
16 Aug 2020 @ 0840 |
--- |
cb |
1D17H PE. Cistern Spring is refilling and the pool is ~1' below the inner tube rim. It has a vigorous boil. |
| 15349 |
03 Aug 2020 @ 1200 |
--- |
Tara |
Down 1-2", mostly clear and calm. |
| 15350 |
03 Aug 2020 @ 1114 |
--- |
Tara |
Down 1/2", 18"-wide boil in center of pool. |
| 15140 |
01 Aug 2020 @ 1837 |
--- |
cb |
2D17H PE. Cistern Spring is in overflow on all sides with a mediocre boil. It is a opalescent, cloudy, turquoise color |
| 15101 |
25 Jul 2020 @ 1301 |
--- |
cb |
1D PE. Drained (pool empty). No water, no sounds, no steam. |
| 15095 |
24 Jul 2020 @ 1852 |
--- |
cb |
5H 50M in the eruption. Cistern Spring has dropped ~2' below overflow. pool is clear and calm. |
| 15091 |
21 Jul 2020 @ 0810 |
--- |
cb |
Cistern Spring is in overflow. To steamy to see the pool. |
| 15054 |
20 Jul 2020 @ 1620 |
--- |
Yates |
Water is rising and visible |
| 15053 |
20 Jul 2020 @ 1205 |
--- |
Yates |
Completely drained, no visible water. |
| 15045 |
20 Jul 2020 @ 0755 |
--- |
bbev |
20hrs PSBE; Drained to 6' below rim of inner tube, ledge in cave still under water. No signs of any boil at this point, light steam. |
| 15042 |
19 Jul 2020 @ 1850 |
--- |
cb |
7H into the eruption. Cistern Spring's pool has dropped ~2.5' below overflow. Pool is clear and mostly calm with the exception of 1 point of small ping pong ball sized bubbles that occasionally break the surface. |
| 15010 |
16 Jul 2020 @ 2010 |
--- |
cb |
3D PE. Cistern Spring's pool is high and in overflow with a very vigorous, blooping boil. |
| 14978 |
14 Jul 2020 @ 0947 |
--- |
cb |
13.5 H PE. Cistern Spring water level has dropped ~1' below the inner tube rim. Pool is a opalescent blue color and calm. |
| 14960 |
12 Jul 2020 @ 0752 |
--- |
bbev |
2D,21hrs PSBE; CS is high, water level over scalloped edges. |
| 14945 |
11 Jul 2020 @ 0924 |
--- |
cb |
1D 22.5H PE. Cistern Spring is in overflow in all directions. |
| 14943 |
10 Jul 2020 @ 2108 |
10 Jul 2020 @ 2125 |
Ben VL |
1D 10H 21M in. Cistern a couple inches below the rim of the inner tube. By 2125 when we walked by again it was a couple inches above the rim of the inner tube. |
| 14930 |
10 Jul 2020 @ 1901 |
--- |
cb |
1D 8H PE. Cistern Spring ~ 1.5' below the rim of the inner tube with a vigorous boil. |
| 14922 |
10 Jul 2020 @ 1200 |
--- |
bbev |
1D, 1hr PSBE; CS appears mostly drained. Water barely visible from lower boardwalk. No steam no sound. What water that is visible appears clear, light blue. |
| 14898 |
06 Jul 2020 @ 1930 |
--- |
cb |
3D 5H PE. Cistern Spring pool is high and overflowing in all directions. It has a vigorous blupping boil. |
| 14891 |
05 Jul 2020 @ 1815 |
--- |
cb |
2D 4H PE. Cistern Spring's pool is high, over the scalloped edges, and is overflowing on all sides. It has a vigorous boil and the water is clear and blue. |
| 14883 |
05 Jul 2020 @ 0750 |
--- |
bbev |
1D, 17.5 hrs PSBE; CS in overflow, barely covering scalloped edges, and trickling into muddy pool. |
| 14878 |
04 Jul 2020 @ 1830 |
--- |
bbev |
1D, 4hrs PSBE; Cistern refilling. 4.5 - 5' below inner tube. Steamy, light boil in opalescent, azure pool. |
| 14876 |
04 Jul 2020 @ 1237 |
--- |
bbev |
22.5 hrs PSBE: water barely visable with 6" bathtub ring. 6.5' below rim of inner tube, holes in cave exposed. |
| 14870 |
04 Jul 2020 @ 1006 |
--- |
cb |
19H 50M PE. Cistern Spring's pool has dropped about 5' - 6' below the inner tube rim. It has a 6" bathtub ring above the water level. Water is just at the entrance to "the cave" on the south side. color is a milky blue. The trough is mostly clear of debris. The channel is half full (empty) of small rocks. |
| 14849 |
02 Jul 2020 @ 0803 |
--- |
bbev |
3D, 6hrs PSBE; Pool is high, lapping over scalloped edges, with light dribble into muddy pool. Moderate boil. |
| 14844 |
01 Jul 2020 @ 1915 |
--- |
cb |
2D 18.5H PE. Cistern Spring is much like last night. In overflow with a average 2 point boil |
| 14817 |
30 Jun 2020 @ 1943 |
--- |
cb |
1D 18.5H PE. Cistern Spring is in overflow, scalloped edges are just barely covered and it has a weak boil. Pool is an opalescent blue color. |
| 14794 |
29 Jun 2020 @ 1900 |
--- |
User34 |
17.5H P.E. Cistern about 1 1/2 feet below inner rim. Calm and beautiful opaque blue. |
| 14772 |
29 Jun 2020 @ 1040 |
--- |
cb |
9H PE. Cistern Spring has dropped ~2.5' below overflow. pool is calm and clear |
| 14727 |
25 Jun 2020 @ 0838 |
--- |
cb |
Cistern Spring is in overflow. It is to steamy to see what the boil looks like. |
| 14718 |
23 Jun 2020 @ 2020 |
23 Jun 2020 @ 2055 |
Ben VL |
8H 38M in. About 2' below overflow. |
| 14716 |
23 Jun 2020 @ 2040 |
--- |
cb |
8H 45M PE. Cistern has dropped about 2' below overflow. pool is calm, no boil. |
| 14705 |
21 Jun 2020 @ 0920 |
--- |
JeffL |
Cistern in overflow, too steamy to see boil |
| 14702 |
21 Jun 2020 @ 0758 |
--- |
bbev |
2D,14hrs post SB: high and overflowing, light boil in opalescent pool. |
| 14689 |
20 Jun 2020 @ 0950 |
--- |
Ben VL |
1D 16H 22M in. Cistern is full and in overflow with a gentile boil. Pool is a milky light blue. |
| 14688 |
20 Jun 2020 @ 0758 |
--- |
bbev |
1D, 14.5 hrs post SB: CS is just 1-2" below overflow. Clear pool, very steamy and difficult to see any boil, no waves or sound. |
| 14685 |
19 Jun 2020 @ 2108 |
--- |
Ben VL |
1D 3H 40M in.
Water level a couple feet below the top of the cave, still slightly exposing a couple of rocks in the southeast corner of the cave. |
| 14682 |
19 Jun 2020 @ 1731 |
--- |
cb |
Cistern Spring has completely drained. No water or steam visible. |
| 14677 |
19 Jun 2020 @ 1054 |
--- |
cb |
17.5 H PE. Cistern Spring is ~ 2' below the rim of the inner tube and has a 3" wet bathtub ring above the water level. It has a few random ping pong ball/tennis ball sized bubbles that are breaking the surface of the pool in the center and on the side closest to the bw. |
| 14652 |
16 Jun 2020 @ 1925 |
--- |
cb |
Cistern Spring has an increase in its activity. It has VIGOROUS boil with big blooping/roiling boils. |
| 14648 |
15 Jun 2020 @ 1840 |
--- |
cb |
Cistern Spring is the same as this morning; high and in overflow. |
| 14645 |
15 Jun 2020 @ 0931 |
--- |
cb |
2D 10.5H post eruptive. Cistern Spring is overflowing with a nice boil (better than last night) and the pool is high. |
| 14642 |
14 Jun 2020 @ 1915 |
--- |
cb |
1D 20.5H post eruptive. Cistern Spring is in overflow, the pool is high (water level is just covering the scalloped edges.) It is a milky, opalescent blue and has a very weak boil. At the trough, debris from the last eruption has been pushed into the channel directly in front of the foot bridge and the standing water is clear. |
| 14636 |
14 Jun 2020 @ 0900 |
14 Jun 2020 @ 0930 |
cb |
Cistern Spring water level is ~2.5' below overflow. Water is a opalescent blue, it is steaming with a weak 1 point. |
| 14632 |
13 Jun 2020 @ 1810 |
--- |
cb |
19.5H post eruptive. The water level in Cistern is ~3' down from the rim of the inner tube. It has a wet water, "bath tub ring", 3 - 4" wide above the water level. It is cloudy blue in color and is very lightly steaming on the North west edge of the pool. There is an occational bubble that breaks the surface and pops. |
| 14626 |
13 Jun 2020 @ 0615 |
--- |
cb |
7.5 H into the eruption Cistern Spring is down 2' below overflow. It is calm and clear. |
| 14615 |
12 Jun 2020 @ 0617 |
--- |
ypcaribou |
Cistern overflowing but not much over right side deposit terraces. Was trickling onto the pools in the terraces but vertical edges not getting much runoff. At 0920-ish, observed no rippling of water into the "muddy pool" at left front. Some overflow on that side, but no rippling seen in the catch pool. |
| 14591 |
11 Jun 2020 @ 0757 |
--- |
cb |
Cistern Spring's pool is very high and overflowing in all directions |
| 14573 |
09 Jun 2020 @ 0954 |
--- |
bbev |
16hrs post SB eruption; CS is low, 3' below rim of "tune", no steam, no boil. water level 3" below wet line on sides of tube, and just above the cave on south side. |
| 14552 |
05 Jun 2020 @ 1955 |
--- |
cb |
Cistern Spring is overflowing in all directions. The pool is high and just barely lapping over the scalloped edges around its rim. (Not as full as the last interval) Color is turquoise, clear, with a mediocre 2 point boil. |
| 14548 |
05 Jun 2020 @ 0752 |
--- |
bbev |
1D, 16hrs post SB eruption: CS is high and overflowing in all directions. Lite boil in center of opalescent pool. |
| 14539 |
04 Jun 2020 @ 1830 |
--- |
cb |
Cisterns pool is at about the same place it was in my earlier post. 2.5 - 3' below the inner tube rim, BUT this afternoon there is a moderate boil with steam. SB is quiet. |
| 14532 |
04 Jun 2020 @ 1100 |
--- |
cb |
Cistern is down ~ 3' from the rim of the inner tube with no boil, steam or even slight convection. There is a 3" wet water ring along the sides, above the water level, which indicates to this observer that Cistern is in a slow drain. The pool is milky turquoise in color. |
| 14528 |
03 Jun 2020 @ 1740 |
--- |
cb |
1H 48M post eruptive Cistern's pool is below overflow. Since SB start it has dropped ~6". No boil but a few occasional bubbles. |
| 14523 |
03 Jun 2020 @ 1021 |
--- |
cb |
1020 the pool is still VERY high with copious overflow on all sides. Scalloped edges are submerged under a few inches of water. Catch basins are still white with no colored bacterial mats accumulated. Typical 2 point boil. pools color is turquoise |
| 14509 |
02 Jun 2020 @ 1822 |
--- |
cb |
Cistern Springs pool is VERY high. The scalloped edges all along the ridge are submerged under water. Copious overflow and catch basins are stark white. |
| 14489 |
02 Jun 2020 @ 0732 |
--- |
bbev |
2D, 1hr post SB eruption: pool is full and overflowing as expected with gentle boil. Heavy runoff to the NW, well into the trees. Also good runoff into muddy pool and channel to the south. |
| 14486 |
01 Jun 2020 @ 2008 |
--- |
hurleyintjl |
3 feet below overflow |
| 14476 |
01 Jun 2020 @ 1817 |
--- |
cb |
Cistern spring is approximately 1' below the inner tube with a moderate boil. photo taken. |
| 14244 |
26 May 2020 @ 2255 |
--- |
Janet Jones |
Overflowing nicely - quite blue. |
| 14128 |
21 Feb 2020 @ 1030 |
--- |
bburrus |
Already drained about 6-12" |