| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 37888 |
31 Oct 2024 @ 1640 |
--- |
SantaFe108 |
Dark green and murky. Splashing inside the cave with boils on both pools leading out towards the Gray Lakes (which are a giant steam bath currently). |
| 37834 |
29 Oct 2024 @ 1642 |
--- |
MAB |
with the crazy winds could actually see IN the cave - 3-4 ft bursts |
| 37798 |
27 Oct 2024 @ 1332 |
--- |
MAB |
noisy boil in cave - two strong boils outside pool separated by a cooler stretch w strong boils farther down Gray Lakes |
| 37732 |
24 Oct 2024 @ 1603 |
--- |
SantaFe108 |
Murky and brown, loudly splashing inside cave. Boiling from 3 points outside of the cave. |
| 37648 |
19 Oct 2024 @ 1601 |
--- |
MAB |
strong boils in the 2 pools by path - audible action in the cave but too steamy to observe |
| 37483 |
10 Oct 2024 @ 1025 |
--- |
SantaFe108 |
Splashing inside cave, boiling at cave entrance. Clear and green. |
| 37372 |
03 Oct 2024 @ 1518 |
--- |
SantaFe108 |
Super clear! splashing inside cave with boil on pool just outside the cave. |
| 35094 |
10 Jun 2024 @ 1259 |
--- |
SantaFe108 |
Clear, green water. Only boiling in the cave pool. |
| 34256 |
19 Apr 2024 @ 1525 |
--- |
MAB |
boiling a clear boil 1-2ft in two spots in the cave - good visibility back in there was surprising - center pool towards Gray Lakes had a lite boil |
| 33931 |
26 Jan 2024 @ 1531 |
--- |
JR |
Strong roil in cave, bubbling throughout. |
| 29027 |
22 Oct 2023 @ 0903 |
--- |
SantaFe108 |
Steam obscured, audibly splashing inside the cave. Both pools leading out of the cave boiling. Gray Lakes are obscured by steam. |
| 28973 |
21 Oct 2023 @ 1532 |
--- |
JR |
Nice strong bubbling throughout. Most roiling is in cave. |
| 28923 |
20 Oct 2023 @ 1558 |
--- |
MAB |
strong boil w clear water to 1ft way back in the cave and another closer to the opening - boil in the pool closest to viewing area 4inch boil also clear - vent to sw same - the farther reaches of Gray Lakes quiet |
| 28877 |
19 Oct 2023 @ 1153 |
--- |
DanS |
Vigorous active boiling from at least five points in pool. Cave vent added low splashing. |
| 29679 |
01 Oct 2023 @ 1025 |
--- |
research-mab |
10/01/2023 - 1025am Green Dragon front pool was bubbling. Vigorously in the cave. |
| 28502 |
26 Sep 2023 @ 1708 |
--- |
MAB |
strong upwelling with clear water in 3 areas including in the cave |
| 27291 |
28 Jul 2023 @ 2028 |
--- |
SantaFe108 |
Clear and loudly boiling in two spots within the cave. Quietly boiling in both pools leading out from it. |
| 26410 |
17 Jun 2023 @ 1517 |
--- |
SantaFe108 |
Clear with heavy bubbling in pool closest to cave, other two pools leading outward are lightly bubbling. |
| 25862 |
28 May 2023 @ 1955 |
--- |
SantaFe108 |
Clear with heavy bubbling in pool closest to cave, other two pools leading outward are lightly bubbling. |
| 25660 |
21 May 2023 @ 1426 |
--- |
SantaFe108 |
Clear with big bubbles from the pool closest to the cave. Other two pools leading outward are lightly bubbling. |
| 25465 |
15 May 2023 @ 1919 |
--- |
ypcaribou |
Clear. Looks browner in pool lining than I recall. Sandhill cranes heard as I type this. |
| 24405 |
15 Oct 2022 @ 0945 |
--- |
MAB |
connected pools 1 2 and 3 all with boils - boil in cave reaching up to 10in with mostly clear water |
| 18326 |
09 Jul 2021 @ 1318 |
--- |
MAB |
steady clear boil in 3 places - next Gray Lake is blue with 1 boil spot and barely connected - noted that the hotter westerly one is only leaking into the pool adjacent to Green Dragon and is not flowing down towards Porkchop and the logger tho it does have a channel that meets with the other one - looks like it did overflow down that channel earlier this season |
| 17725 |
12 Jun 2021 @ 1610 |
--- |
MAB |
Fairly calm one good boil in cave - clear - barely connnected to Gray Lakes- the 1st Gray Lake immediately west is hot blue and boiling |
| 16824 |
24 Jan 2021 @ 1414 |
--- |
markwolf |
possible increased runoff flow from here and gray lakes into Tantalus |
| 15696 |
23 Aug 2020 @ 0710 |
--- |
ypcaribou |
Clear, greenish blue |
| 29160 |
30 Jul 2020 @ 1200 |
--- |
research-mab |
7/30/2020 - no time noted - Charred ground btw Black Hermit and Green Dragon 46-48C |
| 29155 |
12 Jul 2020 @ 1200 |
--- |
research-mab |
7/12/2020 - no time noted - Charred ground between Black Hermit and Green Dragon Spring is hot and expanding! Need to bring temp tool out there |
| 12890 |
31 Jul 2019 @ 0903 |
--- |
cb |
pool is light brown in color. In the cave there is a very vigorous roiling boil to 8". 3 pools within the main pool have fairly vigorous boiling also. runoff at the bridge is clear. |
| 12842 |
28 Jul 2019 @ 0716 |
--- |
ypcaribou |
Clear & green |
| 29122 |
05 Jul 2019 @ 0730 |
--- |
research-mab |
7/5/2019 730-830 Cistern is dry. Took thermal IR images of trail between Black Hermit and Green Dragon. |
| 29120 |
02 Jul 2019 @ 1200 |
--- |
research-mab |
7/2/2019 - no time noted - The dirt trail between Black Hermit Caldron and Green Dragon Spring is heating. Ground cover on both sides of the trail is charred. This area smells sweet like syrup. {arrow -→} TAPP team measured ground at 130°F |
| 11855 |
17 Jun 2019 @ 0853 |
--- |
udo |
Clear and quiet |
| 11001 |
19 Apr 2019 @ 0001 |
--- |
ypcaribou |
Water is muddy per facebook comment. Time unknown. |
| 9845 |
22 Aug 2018 @ 1739 |
--- |
WillBoekel |
GDS has clear water running in its channels and the brown that had coated the channels from the disturbance is turning white and green. |
| 19288 |
15 Jul 2018 @ 1825 |
--- |
research-mab |
7-15-2018 CB GREEN DRAGON 1825 See Note under Steamboat
Vixen platform & runoff channel is wet, water pooled in its tube but I did not see an eruption in the 15 minutes I observed. Pearl still has a yellow hue. Porkchop water is back up to the rim of the pool. Green dragon runoff is again clear however the runoff channels are coated in brown. Yellow funnel has no visible water but I can hear deep grumbling with splashing down deep. Echinus water level is good with nice runoff and a weak 2 vent boil. (hum!) Crater Spring water is LOW and murky brown/gray. Emerald Spring is the same, clear, green with weak convection waves.
https://geysertimes.org/note.php?id=9202 |
| 19274 |
27 Jun 2018 @ 1800 |
--- |
research-mab |
6-27-2018 GREEN DRAGON – 1800 CB see Note under Steamboat
Vixen is back to more regular play. The steam vent by Vixen is quieter. Pearl has bubbles breaking the surface. Pork chop is down about 4" from the rim. Green dragon is putting out chocolate brown runoff. Yellow funnel is way low, muddy brown and turbulent. Blue mud steam vents water/mud is not visable. Crater Spring water level is low as is Echinus. Echinus run off channel is dry in many areas. This back basin is much the same as last night except for Vixen. sorry for the long note! Forgot about Emerald. . . cuz it is the same! Boiling in the East thumb, green and fairly clear.
https://geysertimes.org/note.php?id=8912 |
| 29638 |
02 Oct 2017 @ 1200 |
--- |
research-mab |
10/2/2017 - no time noted - Green Dragon looks very similar today to what it did on 9/23. (It had less steam today than, say, 9/27, so its fountains became more visible once again.) |
| 29632 |
27 Sep 2017 @ 1200 |
--- |
research-mab |
9/27/2017 - no time noted - Green Dragon is still splashing and muddy. It is also emitting large amounts of steam – the most steam I’ve yet seen from the Dragon. Echinus is very steamy too. Lots of steam coming from the features between Vixen and Porkchop as well - Also, Green Dragon doesn’t stink as much as it normally does. More water vapor and less H2S? |
| 29630 |
23 Sep 2017 @ 1435 |
23 Sep 2017 @ 1500 |
research-mab |
9/23/2017 I returned to Green Dragon 1435-1500. - It continues to splash vigorously, effectively acting as a short fountain geyser. I will sketch out its several fountains below. (Also I shot some video) Heights are my estimations. |
| 29629 |
23 Sep 2017 @ 1000 |
--- |
research-mab |
9/23/2017 Green dragon Spring is brown and muddy, has fountains of muddy water rising. - 176°F at Springs outer edge (measured with our thermometer gun)
The other Back Basin features are similar to yesterday except Pearl seems not quite as active – though we need to watch it more to confirm. I witnessed all this on the 930-11 guided walk. {approx time entered} |
| 29619 |
01 Aug 2017 @ 1200 |
--- |
research-mab |
8/01/2017 - no time noted - Green Dragon’s water level seems to be up. |
| 29436 |
15 Jul 2012 @ 1200 |
--- |
research-mab |
7/15/2012 - no time noted - Quite a number of changes after last two days rainstorms - Water in Green Dragon Spring, “drain”, and Gray Lakes higher. Water entering “drain” from both sides |
| 29418 |
28 Jun 2012 @ 0900 |
--- |
research-mab |
6/28/2012 Observed changes since 6/24 :- (seen on rove 0800=0930) - No inflow to “drain” at Green Dragon Spring. |
| 29415 |
21 Jun 2012 @ 0901 |
--- |
research-mab |
6/21/2012 Green Dragon Spring water level fell overnight. No water from Spring flowing into drain pool now. Only a trickle entering from Gray Lakes. - numerous gas bubbles surfacing in Gray Lakes. No visual due to steam, but ripples and waves at edge of water. RP 0900 |
| 29411 |
20 Jun 2012 @ 1200 |
--- |
research-mab |
6/20/2012 - no time noted - Water level in Green Dragon Sp[ring “drain” pool about 10” lower than yesterday. |
| 29412 |
20 Jun 2012 @ 1200 |
--- |
research-mab |
6/20/2012 - no time noted - Gray Lakes by Green Dragon is erupting 1 ½ – 2 ½ ft. |
| 29408 |
29 May 2012 @ 1200 |
--- |
research-mab |
- no time noted - Yesterday, 5/29/12, I observed brown foam floating on the drain pool at Green Dragon Spring. The foam was not in the Spring itself or on the Gray Lakes. |
| 29386 |
26 Aug 2010 @ 0918 |
--- |
research-mab |
8/26/2010 Gray Pools 0918 ie Heavy steam, waves, strong overflow {Rich H and Bruce J in log - see also full writeup in Gosa SPUT Oct 2010 Vol 24, No 5 “VIXEN GEYSER DURING THE NORRIS DISTURBANCE OF AUGUST 26, 2010) |
| 29381 |
16 Jul 2010 @ 1200 |
--- |
research-mab |
7/16/2010 - no time noted - All – please make note of any changes you are seeing in the basin – especially w/ disturbance influenced features. Today it seemed to me that Emerald and Cistern were surging more violently than before. Echinus seems to have become more murky. Gray Lakes seems to be surging pretty heavily. From Mystic Spring to Puff and Stuff, water levels seem to have dropped, waters appear more turbid, and surging seems heavier. Yellow Funnel’s water is very low and turbid, perhaps will become steam vent? Son of Green Dragon seemed (from the boardwalk) empty and was chugging steam. Sagebrush Springs seemed wetter, and I noticed no change w/Pearl. |
| 29371 |
26 Jul 2009 @ 1200 |
--- |
research-mab |
7/26/2009 - no time noted - I noticed from 8/23/08 note that “Middle Pool” from Green dragon was overflowing/boiling. Does anyone know how long that pool (second to the right from Green Dragon) has been filling from both sides and (presumably) draining, from the bottom? (As it is now) |
| 29354 |
30 May 2009 @ 1200 |
--- |
research-mab |
5/30/2009 - no time noted - Disturbance? Emerald boiling, Echinus has boiling, Porkchop small splashes. Back part of Back Basin, water levels low, murky and surging. Yellow Funnel and Green Dragon only have steam. |
| 29778 |
30 Aug 2007 @ 1200 |
--- |
research-mab |
8/30/2007 .- no time noted - Green Dragon Spring – water level dropped (from Tuesday's observations) about 6+ inches and water changed from bluish green to dark gray. Large pool of Green Dragon erupting about 3-5 feet (difficult to see through the steam, so it could’ve been taller). Muddy overflow of the big pool was draining into Tantalus Creek, turning it muddy also. |
| 30089 |
29 Jul 1995 @ 1200 |
--- |
research-mab |
7/29/1995 - no times noted - Disturbance has arrived!!! Green Dragon – Erupting from the “mouth” vent, All vents boiling muddy brown T-86 pH 3.20 All springs around to Echinus have heavy boil and some are muddy pH’s around 3.0. Echinus has gone crazy. Intervals are from 10 m to 1 hour. |
| 30165 |
07 Aug 1994 @ 1200 |
--- |
research-mab |
8/7/1994 - no times noted - It seems the time has come for our Mjr annual disturbance...Grey Lake also Muddy & boiling vigorously Green Dragon also boiling & muddy |
| 30306 |
21 Sep 1993 @ 1200 |
--- |
research-mab |
9/21/1993 no time noted - Water levels are down in Phillips Cauldron which has muddy bubbles, Green Dragon Spring, (Yellow Funnel water level is right up near the rim), Mystic Spring and Root Pool. Root pool has mud showing. Green Dragon does too & so does Grey Lakes. |
| 30272 |
24 Aug 1993 @ 1200 |
--- |
research-mab |
8/24/1993 - no times noted - Other signs of disturbance (albeit mild} - Green Dragon is chocolate brown as are Gray Lakes |
| 30410 |
29 Jul 1992 @ 1800 |
--- |
research-mab |
7/30/92 a.m.- inferred est.times "last night" {29th} - Yellow Funnel down about 5’. Green Dragon isn’t quite as dark as it has been recently. |
| 30398 |
29 Jul 1992 @ 1200 |
--- |
research-mab |
7/29/92 - no time noted - Closed trail shows a great deal of sulfur residue near Butch Geyser, Green Dragon. |
| 30395 |
28 Jul 1992 @ 1200 |
--- |
research-mab |
7/28/1992 - no time noted - Green Dragon is extremely muddy & boiling very violently. Black Hermit Cauldron is no longer boiling and it is beginning to clear up. |
| 30355 |
10 Jul 1992 @ 1200 |
--- |
research-mab |
7/10/92 - no time noted - Green Dragon Springs is draining toward Gray Lakes. There is very little runoff from Grey Lakes & Green Dragon |
| 30328 |
26 Apr 1992 @ 1200 |
--- |
research-mab |
4/26/1992 - no time noted - Green Dragon – green, rapid, steady boil |
| 30582 |
05 Aug 1991 @ 1200 |
--- |
research-mab |
8/5/91- no time noted - Green Dragon & Son of Green Dragon green again. |
| 30496 |
16 May 1991 @ 1200 |
--- |
research-mab |
5/16/1991 - no time noted - Green Dragon – new walkway cut here is safer but sure hacked up “hobbit forest” pH 4 temp 199°F - constant rapid boil in all vents, brownish green. |
| 30757 |
28 Sep 1989 @ 1200 |
--- |
research-mab |
9/28/1989 - no time noted - Green Dragon now back to clear, gray-green. |
| 30739 |
08 Sep 1989 @ 1200 |
--- |
research-mab |
09/8/1989 - no time noted - Green Dragon Spring is very dark chocolate brown. |
| 30834 |
08 Aug 1988 @ 1200 |
--- |
research-mab |
8/8/1988 - no time noted - Green Dragon Spring has two boiling vents external to the cave. |
| 30823 |
06 Aug 1988 @ 1200 |
--- |
research-mab |
8/6/1988 - no time noted - Green Dragon Spring – water level down 2-3”; 2 small bubblers (~6” total) {← unclear about word total-mab} Looks like the eyes on a mask. |
| 30789 |
03 May 1988 @ 1200 |
--- |
research-mab |
May 3 1988 - no time noted - Green dragon Sp is clear water with upwelling to 1’ out of its… pools, it’s ‘cave’ vent sounded vigorously active but it was too steamy to see in. |
| 30861 |
26 Jul 1987 @ 1200 |
--- |
research-mab |
7/26/1987 - no time noted - Green Dragon – still brown, turbid, boiling |
| 30857 |
12 Jul 1987 @ 1200 |
--- |
research-mab |
7/12/1987 no times noted - noteworthy basin changes of the past several days: Basin Wide Disturbance !!??
Green Dragon spring muddy with upwelling > 1 foot. |
| 33428 |
06 Oct 1986 @ 1200 |
--- |
research-mab |
October 6, 1986 - no time noted - *GREEN DRAGON is very brown and muddy, with the two pools in front boiling very strongly. |
| 30931 |
01 Jul 1985 @ 1200 |
--- |
research-mab |
Monday July 1 1985 - no time noted - Also- Green Dragon was “erupting” at about 4 ft ht- is this normal? Palpitator Spring is dry? |
| 31097 |
21 May 1983 @ 1200 |
--- |
research-mab |
May 21 1983 – no time noted ~afternoon - Green Dragon – Brown, muddy. Boiling from 2 points in the pools outside the cave as well as splashing up 2 feet from the cave nearly constantly. |
| 31306 |
08 Jul 1982 @ 1200 |
--- |
research-mab |
7/8/1982 - “About 1200” - Green Dragon Spring – opaque, muddy, splashing boil from 2 front pools, heavy splashing in cave. Boiling looks superheated. |
| 31234 |
20 Feb 1982 @ 1200 |
--- |
research-mab |
February 20 1982 - no time noted - Green Dragon Spring – dark blue-grey H2O that is much clearer than normal. Back Pool- 196° - Middle Pool - 186° , Front - 172° , |
| 31179 |
14 Jan 1982 @ 1200 |
--- |
research-mab |
January 14th 1982 - no time noted - Green Dragon Spring dark green-brown turbid H20 1st pool - 166° ; 2nd - 180° ; 3rd – inacessible |
| 31517 |
14 Aug 1981 @ 1200 |
--- |
research-mab |
14 Aug 1981 - no time noted - Green Dragon – turbid gray brown, boiling heavy from cave and 2 pools in front |
| 31466 |
02 Aug 1981 @ 1200 |
--- |
research-mab |
Sunday August 2 1981 - no time noted - Green Dragon Spring splashing to 4-5’ 198° {sketch of 3 pools 198°- 182°- 170°} gray opaque turbid water, slight increase in boil |
| 31414 |
06 Jun 1981 @ 1200 |
--- |
research-mab |
Saturday June 6 1981 - no time noted - Green Dragon Spring- Muddy gray-green. Cave vent very active – erupting 2 to 3 feet |
| 31766 |
16 Sep 1980 @ 1200 |
--- |
research-mab |
Tuesday September 16, 1980 - no time noted - Green Dragon – changed to brown opaque water {sketch with temps 198° in cave to 175° to west w/ “boiling in cave to 2 feet} |
| 31714 |
23 Aug 1980 @ 1200 |
--- |
research-mab |
Saturday August 23 - no time noted - Green Dragon Spring – Slightly turbid, overflowing, green color {sketch temps from 179-201°) vent at cave erupting 1-3 feet |
| 32009 |
28 Sep 1979 @ 1200 |
--- |
research-mab |
September 28 1979 - no time noted - Green Dragon – 176º Pool furthest from vent, 198º under cave, still boiling…. |
| 31965 |
21 Sep 1979 @ 1200 |
--- |
research-mab |
Friday September 21 1979 - no time noted - More end of summer changes! Green Dragon Spring – Lost all green color and changed to an opaque tan brown, although not as dark as last year. Boiling vigorously in each pool, strongest (2-3 feet) in cave. 199ºF in cave, 189 in pool furthest from cave. |
| 31902 |
17 Aug 1979 @ 1200 |
--- |
research-mab |
Aug 17 1979 - no time noted - Green Dragon Spring – 182º – S.W. pool - 201ºF -boiling vent next to cave |
| 31866 |
11 Jul 1979 @ 1200 |
--- |
research-mab |
July 11 1979 - no time noted - Green Dragon is very grey. |
| 32229 |
28 Sep 1978 @ 1200 |
--- |
research-mab |
09/28/1978 - no time noted - Green Dragon murky |
| 32212 |
15 Sep 1978 @ 1200 |
--- |
research-mab |
09/15/1978 - no time noted - ...basin wide disturbances continue! - Green Dragon Springs – water remains a deep chocolate brown. Vent closest to trail is forming a deep, undercutting cave. Trail logs moved back 2 feet. {Temps and sketch} |
| 32208 |
14 Sep 1978 @ 1200 |
--- |
research-mab |
09/14/1978 - no time noted - Green Dragon has become dark brown. |
| 32052 |
25 Mar 1978 @ 1200 |
--- |
research-mab |
March 25 1978 - no time noted - Green Dragon Spring – walls of the cavern are very green. Pool full, clear green, and bubbling moderately. |
| 32312 |
21 Aug 1977 @ 1200 |
--- |
research-mab |
Aug 21 1977 - no time noted - Yellow Funnel is brown. Green Dragon is brown. |
| 32303 |
19 Aug 1977 @ 1200 |
--- |
research-mab |
08/19/1977 - no time noted - changes- The three vents of Green Dragon Spring are all more active than usual and Black Hermits is down, and boiling vigorously. Mud Spring is opaque and still retains its color. Decker Geyser is boiling in many spots. Emerald Spring has extended its area of boiling along the edge parallel to the trail and is murky. |
| 32584 |
17 Sep 1976 @ 1200 |
--- |
research-mab |
09/17/1976 - no time noted - Green Dragon Spring – south pool has a very large spouting area. It’s about 1 meter in diameter & erupts up to heights of 2-4’. |
| 32567 |
14 Sep 1976 @ 1200 |
--- |
research-mab |
09/14/1976 - no time noted - Green Dragon Spring – still very murky, boiling still very active in the main pool area. |
| 32559 |
10 Sep 1976 @ 1200 |
--- |
research-mab |
09/10/1976 - no time noted - Green Dragon Spring – chocolate brown color, with many new patches of boiling. |
| 32514 |
31 Aug 1976 @ 1200 |
--- |
research-mab |
08/31/1976 - no time noted - Green Dragon – now brown |
| 32480 |
15 Aug 1976 @ 1200 |
--- |
research-mab |
08/15/1976 - no time noted - Root Pool and Green Dragon Spg & Muddy Spg. Both bubbling quite vigorously and quite turbid. A call to Old Faithful visitor center verified the hypothesis that the park had a slight tremor which caused the aforementioned change in B. Basin Spg activity. |
| 32429 |
20 Jul 1976 @ 1200 |
--- |
research-mab |
July 20 1976 - no time noted - The pools in Back Basin have undergone a color change. Tangle Root Spring is very clear & able to see to bottom. Green Dragon is very muddy, as is Black Hermit’s Cauldron. Muddy Sneaker spouter is putting out gray matter. |
| 32659 |
17 Aug 1975 @ 1200 |
--- |
research-mab |
08/17/1975 - no time noted - Green Dragon Spring appears to be clearing somewhat. |
| 32712 |
14 Aug 1974 @ 1200 |
--- |
research-mab |
08/14/1974 - no time noted - Green Dragon – Very muddy & active |