| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 29678 |
01 Oct 2023 @ 1025 |
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research-mab |
10/01/2023 - 1025am Green Dragon front pool was bubbling. {Vigorously in the cave.) |
| 29677 |
20 Sep 2023 @ 1050 |
--- |
research-mab |
9/20 - 1050 Vent near Green Dragon is still expanding. |
| 29457 |
07 Aug 2012 @ 1200 |
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research-mab |
8/7/2012 - no time noted - Gray Lakes bubbling from two vents. Not nearly as vigorous as possible disturbance early this summer. |
| 29446 |
25 Jul 2012 @ 1200 |
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research-mab |
7/25/2012 - no time noted - Gray Lakes no longer bubbling |
| 29433 |
15 Jul 2012 @ 1200 |
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research-mab |
7/15/2012 - no time noted - Quite a number of changes after last two days rainstorms - Water flowing in both channels of Tantalus under bridge just west of Orby platform |
| 29423 |
03 Jul 2012 @ 1200 |
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research-mab |
7/3/2012 - no time noted - No water under boardwalk at bridge west of Orby platform |
| 29650 |
03 Jul 2012 @ 1200 |
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research-mab |
7/3 2012 - no time noted - H Heasler was in the office today… The activity at Gray Lakes is noteworthy |
| 29647 |
21 Jun 2012 @ 0900 |
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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 |
| 29644 |
20 Jun 2012 @ 1200 |
--- |
research-mab |
6/20/2012 - no time noted - Gray Lakes by Green Dragon is erupting 1 ½ – 2 ½ ft. |
| 29649 |
29 May 2012 @ 1200 |
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research-mab |
5/30/2012 log - 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. |
| 29671 |
26 Aug 2010 @ 0918 |
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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) |
| 29651 |
16 Jul 2010 @ 1200 |
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research-mab |
7/16/2010 - no time noted - 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. |
| 29652 |
20 Aug 2008 @ 1030 |
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research-mab |
8/20/2008 The muddy stream coming from Gray Lakes is clear again @ 1030 this morning. The vents have stopped erupting. |
| 29653 |
18 Aug 2008 @ 1830 |
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research-mab |
8/18/2008 At 1830 two new vents have opened in the middle of the runoff from Gray Lakes half way between Gray Lakes & the boardwalk. The vents have turned what was a clear stream yesterday muddy brown |
| 29779 |
30 Aug 2007 @ 1200 |
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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. |
| 29654 |
02 Jul 2006 @ 1200 |
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research-mab |
7/2/2006 loose page by JT - no time noted - Gray Lakes – V. active |
| 29670 |
13 Jun 2006 @ 1200 |
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research-mab |
2006 Listserve Archive Geyser report June 13 TSBryan - no time noted - I couldn't see Gray Lakes for the steam, but there was some rather large splashing going on out there. |
| 29655 |
07 Jul 1998 @ 1200 |
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research-mab |
7/7/1998 - no time noted - Green Dragon – gray green, “normal” boil -- -
Gray Lakes – clear, green |
| 29656 |
21 Aug 1995 @ 1200 |
--- |
research-mab |
8/21/95 - no time noted - Water levels down on Mud, Mystic, Green Dragon & Gray Lakes. |
| 30164 |
07 Aug 1994 @ 1200 |
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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 |
| 29657 |
30 Jun 1994 @ 1200 |
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research-mab |
6/30/1994 - no time noted - A large Basin wide water level drop today. “Sizzle Pot” dry. Black Hermit down. Green Dragon down. Hydrophane down. Gray Lakes down. Phillips Cauldron down. Blue Mud Steam vent down. You get the idea. I think (Guess) that we have just finished a weak disturbance |
| 30308 |
21 Sep 1993 @ 1200 |
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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. |
| 29658 |
24 Aug 1993 @ 1200 |
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research-mab |
8/24/1993 - no time noted - Other signs of disturbance (albeit mild) - Green Dragon is chocolate brown as are Gray Lakes |
| 30361 |
17 Jul 1992 @ 1200 |
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research-mab |
7/17/1992 - no time noted - Grey Lakes is dark brown & many boiling areas. |
| 29659 |
10 Jul 1992 @ 1200 |
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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 |
| 29660 |
26 Apr 1992 @ 1200 |
--- |
research-mab |
4/26/1992 - no time noted - - Gray Lakes – blue and boiling, light overflow
--- Green Dragon – green, rapid, steady boil |
| 30556 |
17 Jul 1991 @ 1200 |
--- |
research-mab |
7/17/91 Grey Lake water level lowest in 10 years, at least, since I’ve worked here - Middle portion is dry |
| 30538 |
24 Jun 1991 @ 1200 |
--- |
research-mab |
6/24/1991 - no time noted - Grey Lakes water level is down. |
| 29669 |
03 Sep 1990 @ 1200 |
--- |
research-mab |
9-03-90 Hydrophane Springs complex water down 20-40cm.
Gray Lakes - dark turbid brown, surging – boiling 25-50cm |
| 29668 |
01 Sep 1990 @ 1200 |
--- |
research-mab |
9-01-90 Annual Norris Geyser Basin wide-spread thermal disturbance. Reported to have been first observed in Back Basin:- Echinus Geyser – weak minor eruptions
Hydrophane Springs Complex – water level ↓10cm -Gray Lakes – color change from moderately turbid gray to very turbid dark brown. - South Tantalus Creek level up 1-2cm from increased discharge of Gray Lakes. |
| 30835 |
08 Aug 1988 @ 1200 |
--- |
research-mab |
8/8/1988 - no time noted - Grey Lake is bluish due to increased amount of hot water coming from the Hydrophane Springs. |
| 29667 |
06 Oct 1986 @ 1200 |
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research-mab |
{no time noted - Disturbance report Bohmnan to R Hutchinson} - October 6, 1986 - The HYDROPHANE SPRINGS group or area has two quite audible steam vents active in it...perhaps an increase in activity. The runoff area below GRAY LAKES is unusually wet and muddy. |
| 31235 |
20 Feb 1982 @ 1200 |
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research-mab |
February 20 1982 - no time noted - Gray Lake – North Unit 162° dark blue, very clear H2O |
| 29661 |
16 Sep 1980 @ 1200 |
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research-mab |
Tuesday September 16, 1980 - no time noted - Gray Lakes– South unit- opaque tan/gray, bubbling gently in many localities. 156º // North Unit – thick muddy brown opaque water 172ºF |
| 31719 |
23 Aug 1980 @ 1200 |
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research-mab |
Saturday August 23 - no time noted - Grey Lakes - South unit 159°F Turbid tan-green; north unit – 168°F clearer green water – overflowing. |
| 29662 |
09 Jun 1980 @ 1200 |
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research-mab |
[JUNE 9 1980] {observations made over the week and recorded on 9th} - no time - Greys Lakes - Blue to north, grey brown to south 158°F |
| 29663 |
21 Sep 1979 @ 1200 |
--- |
research-mab |
September 21 1979 - no time noted - More end of summer changes! - Gray Lakes Muddy tan brown, bubbling in many spots 158ºF |
| 31901 |
17 Aug 1979 @ 1200 |
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research-mab |
Aug 17 1979 - no time noted - Gray Lakes - 186ºF |
| 32213 |
15 Sep 1978 @ 1200 |
--- |
research-mab |
09/15/1978 - no time noted - ...basin wide disturbances continue! - Grey Lakes – Grey/brown water swelling up. Temp 178°F |
| 32497 |
22 Aug 1976 @ 1200 |
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research-mab |
08/22/1976 - no time noted - Gray Lakes are unchanged, getting there is as squishy as ever! |
| 29664 |
07 Aug 1975 @ 1200 |
--- |
research-mab |
08/07/1975 - no time noted - Gray Lakes are back to their green-blue color (prequake) |
| 5748 |
14 Aug 1974 @ 1800 |
--- |
research-mab |
08/14/1974
Gray Lakes erupting 2-3 ft very muddy |
| 29665 |
31 Aug 1972 @ 1200 |
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research-mab |
08/31/1972 - no time noted - Runoff of Tantalus Creek from the Gray Lakes is << 50% of the normal amount- a dark chocolate brown color |
| 29646 |
19 Aug 1972 @ 1200 |
--- |
research-mab |
08/19/1972 - no time noted - Gray Lakes – water dark chocolate brown again from renewed activity with much boiling & waves in center. |
| 32951 |
12 Sep 1971 @ 1500 |
--- |
research-mab |
09/12/1971- {afternoon temps 2-4pm} - Gray Lakes 187° north end, Probably 199° in center. Dark brn, vigorous 1-2’ muddy caldron north half |
| 29645 |
10 Sep 1971 @ 1200 |
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research-mab |
09/10/1971 - no time noted - Gray Lakes – the color has changed in the past 2 days from a normal medium gray to a very turbid coffee brown. The northern half of the lakes has increased markedly in its boiling activity, behaving very much like a muddy caldron such as Colloidal is now. The runoff from it into the south branch of Tantalus Creek is very reminiscent of the Muddy Missouri – only darker. |
| 29666 |
22 Jun 1967 @ 1200 |
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research-mab |
{Ed Leigh - no time noted} Gray Lakes are located at the south end of the Back Basin. The lakes were named by Hague in 1904. The water temperature at the north end was 162°F on June 22, the water had a pH of 5 |