| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 19578 |
15 Sep 2021 @ 0858 |
--- |
cb |
CISTERN SPRING water is ~ 1' below the rim of the inner tube and has a audible boil. To steamy to accurately view. |
| 19558 |
14 Sep 2021 @ 0941 |
--- |
cb |
3D3H .. Cistern spring is filling. No visable water yet but it has a VERY audible roiling boil with heavy steam. |
| 19527 |
13 Sep 2021 @ 1019 |
--- |
cb |
CISTERN SPRING @1019 has no visable water or audible sounds but has a fair amount of steam coming from deep down in its vent. |
| 18741 |
30 Jul 2021 @ 0555 |
--- |
ypcaribou |
Just below overflow. Right shoulder dry. Muddy Pool is more of a mud pit with a puddle of water in the center. |
| 18577 |
22 Jul 2021 @ 0930 |
--- |
Tara |
Milky blue, weak boil. Water level ~1cm below rim, overflow out back and west channels |
| 17614 |
09 Jun 2021 @ 1807 |
--- |
Craigmon99 |
Has become noticeably less opalescent and more clear in my 1.5 hours at Norris |
| 17601 |
09 Jun 2021 @ 0940 |
--- |
Tara |
Full, milky blue, light boil. |
| 17579 |
08 Jun 2021 @ 1009 |
--- |
cb |
pool is high with a weak boil and weak overflow to the south and a little over the backside. @ 1200 overflow has improved. A bit into the muddy pool, better flow out the established runoff channel to the south and catch basins are full and overflowing |
| 17537 |
07 Jun 2021 @ 1647 |
--- |
novakg |
Gorgeous off blue, gently boiling and in overflow in several places. Sorry, I didn't make careful notes. |
| 17513 |
06 Jun 2021 @ 0837 |
--- |
bbev |
5D, 20.5 hr PSBE; CS is high and overflowing out back channel, and has yet to reach overflow to the NW terraces or into muddy pool. Light, 3 point boil in opalescent light blue pool |
| 17478 |
05 Jun 2021 @ 1443 |
--- |
steve |
About a foot or slightly more below overflow and bubbling. Opalescent light blue color. |
| 17473 |
05 Jun 2021 @ 0924 |
--- |
cb |
4D22.5H PE. Water is up to the rim of the inner tube. it has a blopping boil. @1002 it's filling fast this morning! In a half hours time water has come up ~ 4" to past the rim |
| 17444 |
04 Jun 2021 @ 1620 |
--- |
cb |
4D 4.5H PE Cistern Spring water level has only come up a few inches since this morning observation. It is just covering (lapping over) the 2 holes inside the cave on the south side. Still has a vigorous boil. |
| 17445 |
04 Jun 2021 @ 0943 |
--- |
cb |
3D22H PE. Cistern spring is filling. water is at the 2 holes near the Cave about 6' from the inner rim.with a vigorous boil. |
| 17448 |
04 Jun 2021 @ 0804 |
--- |
bbev |
3D, 20hrs PSBE: water heard, and vigorous boiling seen, by standing on railing, deep in crater. Appears to be refilling, very steamy on warm morning. |
| 17400 |
03 Jun 2021 @ 0730 |
--- |
cb |
Cistern spring is lightly steaming. no visible or audible signs of water in the pool. |
| 17388 |
02 Jun 2021 @ 1420 |
--- |
Tara |
Empty and quiet, water not visible yet. |
| 17385 |
02 Jun 2021 @ 0955 |
--- |
Tara |
Completely dry, no water visible, light steam. |
| 17315 |
31 May 2021 @ 1342 |
--- |
molliepope |
Cistern has dropped about 2-3 inches. Small amount of bubbles reaching surface in center of pool. |
| 17192 |
26 May 2021 @ 0830 |
--- |
Suzanne |
Full and overflowing in all directions, with a good boil. |
| 17084 |
14 May 2021 @ 0930 |
--- |
cb |
Cistern spring pool is high and overflowing in all directions, especially out of the established runoff channel to the south. |
| 17046 |
11 May 2021 @ 1120 |
--- |
cb |
Cistern spring is overflowing in all directions. Can't see boil through the steam. |
| 17032 |
09 May 2021 @ 1146 |
--- |
bbev |
4D, 12hrs PSBE, full and overflowing in all directions. Pool is clear with steady roiling boil. |
| 17005 |
06 May 2021 @ 1934 |
--- |
bbev |
1D, 19.5 hrs PSBE; slightly steamy which is only sight of water. |
| 17003 |
06 May 2021 @ 0928 |
--- |
MAB |
Completely empty-very light steam for the cool morning- no sound |
| 16924 |
26 Apr 2021 @ 1042 |
--- |
DanS |
Full overflowing all directions with 2 point boil. |
| 16898 |
20 Apr 2021 @ 1810 |
--- |
MAB |
in overflow - variable boil w a pretty blue color. VR of overflow in midafternoon as well |
| 16846 |
06 Feb 2021 @ 1430 |
--- |
Micah Kipple |
Water visible way down in vent. Just starting to refill(?) |
| 16825 |
24 Jan 2021 @ 1509 |
--- |
markwolf |
1-2 cm below rim. good boil |
| 16791 |
24 Dec 2020 @ 1443 |
--- |
Micah Kipple |
Full. Boiling, and overflowing on all sides. |
| 16787 |
23 Dec 2020 @ 1427 |
--- |
Micah Kipple |
Full. Overflowing with a 2 point light roiling/boil in the center. |
| 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. |