| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 17029 |
09 May 2021 @ 1158 |
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cb |
pool is down about 4". Still a vigorous boil on the north & SE edges. convection waves in the alcove. The water is clear |
| 16996 |
06 May 2021 @ 1954 |
--- |
cb |
Pool is very high and has several boilingpoints. especially on the north edge |
| 16392 |
10 Oct 2020 @ 1007 |
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cb |
water level is higher than last observed. it is covering the "nose" on the south end of the pool. bubbles on the south and north edge of the pool but a bit hard to see through the steam. Water is clear with a tiny of green. |
| 16339 |
06 Oct 2020 @ 1206 |
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cb |
Crater Spring pool is high and just covering the nose on the south edge of the pool with a moderate boil in this area. Also, moderate boil on the north edge that's blooping to 2". pool is clear and greenish. No boil in the Alcove area. |
| 16274 |
26 Sep 2020 @ 1640 |
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cb |
water level is high! The peninsula on the east side of the pool is covered in 3" of water. weak boil on both the north and east sides of the pool. nothing in the alcove. |
| 16047 |
06 Sep 2020 @ 0726 |
08 Sep 2020 @ 2126 |
underarockphoto |
Crater remained clear with a light boil at a static water level 1ft below the rim of the crater during all three days of observation. |
| 15892 |
29 Aug 2020 @ 1230 |
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cb |
The pool is high and has more areas that have boiling points. North end, East side & South end of the pool have more vigorous boiling than I observed on 8/26/20. Pool is clear. No activity in the alcove area on the west end. |
| 15546 |
13 Aug 2020 @ 1012 |
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cb |
pool has dropped ~4" since last observed. Moderate boil in the north edge and bubbles breaking the surface on the east edge. pool is clear. |
| 14952 |
10 Jul 2020 @ 1530 |
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cb |
high water in the pool. only 2 weak boiling points on north edge of the pool. |
| 14612 |
12 Jun 2020 @ 0907 |
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ypcaribou |
Clear, spa blue. Full. Small piece of rock that is cracked off of the large deposit that is separated on left is just visible above water |
| 14524 |
03 Jun 2020 @ 1300 |
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cb |
The pool is also VERY high! Water level has extended into the rocky area beyond the smooth crater rimmed rocks. Soft ball sized bubbles are just breaking the surface in 3 points on the north edge of the pool. No other activity in the pool. Water is clear. |
| 14500 |
01 Jun 2020 @ 1756 |
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ypcaribou |
Full almost to an overflow. Clear, spa blue. |
| 13932 |
13 Oct 2019 @ 1540 |
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cb |
pool is clear, high with a light boil on the east and north sides |
| 13925 |
12 Oct 2019 @ 1215 |
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cb |
water level is high still. ver gentle boil on the north and east sides of the pool. |
| 13888 |
05 Oct 2019 @ 1200 |
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cb |
pool is high with a boil on the N end and E side. |
| 13800 |
25 Sep 2019 @ 0750 |
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DanS |
Water level up with multipoint vigorous boils. |
| 13754 |
19 Sep 2019 @ 1200 |
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cb |
The pool water level is VERY high. on the south end, water is up to the gravel. East end water level covers "the beach" and the nose is submerged 4" below the water. Occational bubble by the nose. slight bubbling on the North end. No bubbling in the alcove. |
| 13391 |
25 Aug 2019 @ 0739 |
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ypcaribou |
Full with water to left of left broken edge. Clear, not splashing, yellow on bottom of crater. |
| 13301 |
17 Aug 2019 @ 1709 |
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cb |
Crater Spring pool is up another 4" since last observation. Water is up to and covers the bottom part of the "nose" on the east edge. |
| 13256 |
14 Aug 2019 @ 1629 |
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cb |
pool is back up to typical water level. (is there such a thing at Norris?) Water is just under the "nose" on the East edge by about 2.5". It is clear with boiling on the North edge, some by the nose. nothing in the alcove. |
| 13123 |
09 Aug 2019 @ 0810 |
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cb |
water level has come up quite a bit. Rocks in the pool on the south end are almost covered. 10 - 12" below the peninsula rock on the east rim. Vigorous boil on the north edge. Alcove has 2" of water covering the shelves with occasional 2" bubble breaking the surface. color is emerald green and clear. |
| 13087 |
07 Aug 2019 @ 0747 |
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bbev |
Boiling vigorously in far side of pool. 2-3' below edge of pool. Root pool low and boiling. |
| 13077 |
06 Aug 2019 @ 1735 |
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cb |
Very VERY low. 3 - 4' below the hight water mark and a vigorous boil to 3' from the north end of the pool. No water observed in the alcove (behind the broken crater rim) until walking back from Tantalus. Water was filling the alcove and erupting to 1'. |
| 13015 |
04 Aug 2019 @ 0741 |
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cb |
pool is crazy low! down 3' from high water mark and a foot below the peninsula rock. Rocks in the pool to the NE & S ends of the pool are completely exposed. Vigorous boil to 2' on north end and the alcove has little water but has a 6" boil coming up from behind the broken chunks of rim. |
| 12993 |
03 Aug 2019 @ 0821 |
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cb |
Water level is down 6" from the tip of the peninsula on the west end |
| 12963 |
02 Aug 2019 @ 1745 |
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bbev |
Pool has dropped another 2-3" from this morning. Still boiling and clear. |
| 12976 |
02 Aug 2019 @ 0931 |
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MAB |
per cb not as full as yesterday. 3 areas of boil. At this time Root Pool was 2 connected pools with light boil in the northern one |
| 12951 |
02 Aug 2019 @ 0806 |
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bbev |
Still clear and boiling in several areas. Water level has dropped to expose back shelf, maybe 4" lower than yesterday evening. |
| 12930 |
01 Aug 2019 @ 1748 |
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bbev |
Vigorously boiling in east, north, and west areas of spring |
| 12922 |
01 Aug 2019 @ 1020 |
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cb |
pool has dropped 4". Vigorously boiling in the alcove, the N edge and the E peninsule areas. |
| 12887 |
31 Jul 2019 @ 0834 |
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cb |
pool is high with boiling on the south end by the pointed rock reaching 6". Boiling on the north end of the pool (toward SB runoff channel) is vigorous and has a 4 point boil. Small bubbles in the pool, alcove behind the broken off crater rim. |
| 12846 |
28 Jul 2019 @ 0733 |
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ypcaribou |
Full, no splashing, has a yellow tinge below water. |
| 12809 |
26 Jul 2019 @ 1015 |
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cb |
pool is high and covers the point on the south end |
| 12097 |
03 Jul 2019 @ 0950 |
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cb |
water level in the pool has risen 3". |
| 11856 |
17 Jun 2019 @ 0900 |
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udo |
Clear. Water level is above rim within the crater, higher than I've seen before. |
| 11820 |
16 Jun 2019 @ 0830 |
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cb |
water level remains high, just reaching the sandy berms on the north and south rims. Some areas boiling on the north end. |
| 11354 |
26 May 2019 @ 0647 |
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ypcaribou |
Quite full, just below top of scalloped rim on right side, water surrounding rock on left from collapsed edge |
| 11310 |
22 May 2019 @ 1614 |
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cb |
Pool is VERY high. Water is covering the ledge on the S end of the pool by 2" of water. |
| 11235 |
13 May 2019 @ 1106 |
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MAB |
Higher water level than May 02 - about 6 inches up the west rock with the cracks. Good bubbling from east and north vents. |
| 11145 |
02 May 2019 @ 1034 |
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MAB |
almost full - water at bottom of west rock. south rock submerged |
| 11056 |
23 Apr 2019 @ 1045 |
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MAB |
water level up 8 in since 20th |
| 11021 |
20 Apr 2019 @ 1036 |
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MAB |
Low water, vigorous splashing from the north vent. |
| 9971 |
31 Aug 2018 @ 1019 |
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MAB |
Water level is up, now covering the south-center rock. Water also visible in west vent area below the collapsed crater shelf. |
| 9834 |
22 Aug 2018 @ 1839 |
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cb |
water level is almost covering the center rocks and is high and boiling in the side feature. |
| 9619 |
10 Aug 2018 @ 1328 |
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MAB |
Low clear water, up a few inches since last sighting. Vigorous splashes from north vent. |
| 9384 |
01 Aug 2018 @ 0943 |
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MAB |
More water than my last visit - east side maybe 8-10" at its deepest; no water over the south-center rock; no water on west side. North vent splashing 1-2', grumbles and water noises from west vent but no water visible. |
| 9303 |
26 Jul 2018 @ 1535 |
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MAB |
LOW water. Water only present in the lower reaches of north and east side of the entire basin. West side is entirely dry.
Clear water splashing 12-18" from the northerly vent. |
| 9129 |
11 Jul 2018 @ 0912 |
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Tara |
Down about 3 feet from rim and boiling and bursting to about 1 foor in north end of crater. |
| 4783 |
04 Aug 2000 @ 0850 |
04 Aug 2000 @ 1000 |
research-mab |
08/04/2000 Crater Spring 0850-1000 3’-6’ eruptions |
| 4788 |
02 Aug 1987 @ 1800 |
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research-mab |
8/2/1987 Crater Spring on the trail past Echinus – is erupting 2-3 feet high, not continually. |
| 4841 |
02 Aug 1983 @ 1800 |
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research-mab |
8/2/1983 Marker at Crater Spring still in place so definitely dormant. Yellow Funnel still clear and overflowing. Blue drained. |
| 4978 |
13 Oct 1979 @ 1800 |
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research-mab |
10/13/1979 Crater Spring was periodically throwing grey water across the trail this afternoon. Bursts were hitting out 6 to 8 feet. I moved the logs marking the trail back 5 feet. The water level in the pool itself was the lowest I have seen. |