| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 33733 |
02 Jan 2024 @ 1320 |
--- |
JR |
Turquoise but opaque, slapping water with a bit of bubbling on the rim. |
| 29434 |
31 Oct 2023 @ 1658 |
--- |
MAB |
seafoam green color with creamy band of suspended sediments at the edges - little vent midway up pool on N side still sputtering and creating ripples but not as strong as seen previously |
| 28905 |
20 Oct 2023 @ 0800 |
--- |
MAB |
still agitated by the vent halfway up the right side on the edge of the pool |
| 28800 |
14 Oct 2023 @ 1742 |
--- |
MAB |
Agitated by waves coming from a vent along the edge midway up the pool on the right side |
| 25529 |
18 May 2023 @ 0905 |
--- |
MAB |
full - green with floaties - French gray color sediments around sides |
| 24522 |
29 Oct 2022 @ 1805 |
--- |
MAB |
full aqua greenish color with french gray clay color sediments around all sides - slight ripple waves from vent on the west end |
| 24295 |
07 Oct 2022 @ 1217 |
--- |
DanS |
Jetsam is a colloidal light aquamarine color. Edge spouter not active. |
| 23051 |
05 Aug 2022 @ 1307 |
--- |
cb |
Jetsam pool is high again. ~3" below overflow & clay colored. |
| 23013 |
03 Aug 2022 @ 1129 |
--- |
cb |
Pool level has dropped to ~1' below overflow. A weak boil over the far north end of the pool on the edge. color is very watery light brown. |
| 21070 |
24 Apr 2022 @ 1410 |
--- |
DanS |
Pool in overflow. Small unng on edge of pool not erupting. |
| 21039 |
18 Apr 2022 @ 1255 |
--- |
MAB |
full cloudy blue with whitish suspended matter on the edges similar to last fall |
| 20173 |
28 Oct 2021 @ 1521 |
--- |
MAB |
seafoam green color with whitish edges - full |
| 19703 |
23 Sep 2021 @ 1555 |
--- |
cb |
Water level is all the way up to high water mark and very close to overflow. side vent is active and erupting to 1'. color of water is a aqua blue. |
| 19615 |
16 Sep 2021 @ 1154 |
--- |
cb |
Jetsam is 1' below rim with the side vent toward the Palm pool splashing to ~1'. And a small new feature below Jetsam in Ledge's runoff channel erupting to 6". |
| 19001 |
22 Aug 2021 @ 0903 |
--- |
MAB |
cloudy seafoam green in color - full |
| 18766 |
31 Jul 2021 @ 0839 |
--- |
MAB |
down 1.5ft - still clay brown color - no visible boils |
| 18665 |
25 Jul 2021 @ 1815 |
--- |
cb |
pool down 3'+ |
| 18582 |
22 Jul 2021 @ 1250 |
--- |
Tara |
Light brown muddy water, down 1.5 feet, bubbling in NW side |
| 18298 |
06 Jul 2021 @ 0847 |
--- |
MAB |
Down 2 feet!! Still the same odd french gray clay color |
| 17547 |
07 Jun 2021 @ 0858 |
--- |
MAB |
full enough to flow out west notch - shoulder vent active - strong bubblers on NW edge |
| 16957 |
29 Apr 2021 @ 1455 |
--- |
DanS |
UNNG at edge of Jetsam erupting. |
| 16927 |
26 Apr 2021 @ 1122 |
--- |
DanS |
UNNG at edge of Jetsam is active. |
| 16278 |
26 Sep 2020 @ 1410 |
--- |
cb |
Jetsam pool is high, 3" below overflow |
| 11016 |
20 Apr 2019 @ 0917 |
--- |
MAB |
Full, a pretty Green color, the shoulder vent erupting gangbusters. |
| 10509 |
30 Sep 2018 @ 1030 |
30 Sep 2018 @ 1610 |
MAB |
About a foot above water level and a meter south of the existing fracture/spouter, steam was visible in the morning at the farthest end of the depression, in warmer afternoon one could see tiny blips in the water closer to Jetsam in the depression. In other news Jetsam was full and in overflow with slight convection. |
| 9621 |
10 Aug 2018 @ 1607 |
--- |
MAB |
Side vent active but not as tall as seen previously. Pool is closer to overflow. |
| 9383 |
01 Aug 2018 @ 1620 |
--- |
MAB |
The vent on the south shoulder of Jetsam is displaying bursts to 3-4 feet! Some stronger than others. Jetsam itself is well below overflow. This seen again around 1715 and walking out 1843 |
| 7721 |
17 Oct 2017 @ 0935 |
--- |
MAB |
Spouter on south rim still active through the day- I think the vent is larger too. Jetsam is full- slight trickle overflow to SW |
| 6291 |
11 Sep 2017 @ 0930 |
11 Sep 2017 @ 1800 |
MAB |
Water level a bit lower - the spouter on the south (left) rim has enlarged its vent and frequently splashing - some up to 2 feet. |
| 5680 |
03 Sep 2017 @ 1907 |
--- |
srboom |
Splashing from vent on south side of pool. |
| 5364 |
24 Aug 2017 @ 1000 |
--- |
MAB |
Spouter on the south rim of Jetsam is quite active - vent area looks enlarged |
| 4213 |
04 Jun 2017 @ 1600 |
--- |
MAB |
The scummy floating mats that were present on opening have sunk. Jetsam looks hotter with clear water and is overflowing to the south from the west end. |
| 3385 |
28 Jul 2016 @ 1309 |
--- |
MAB |
Little side vent on the south rim of Jetsam was active today. Also seen IE at 1850. You can hear the wave-slosh inside before water comes out, kinda fun |
| 3150 |
28 Jun 2016 @ 1003 |
--- |
MAB |
The vent in the center on the south side of Jetsam (above full pool water level) was sputtering to 6-8". Not as much of an 'eruption' as seen on my last visit-but could be worth watching. I didn't make it back there to see it again. Be sure to look there when you drop into Porcelain. |
| 33473 |
20 Jun 2016 @ 1245 |
--- |
MAB |
Erupt-y vent on the south side, with little splashes to about 1 foot. If you look at Jetsam as elongated roughly East-West, the splashy erupting vent was roughly in the middle of that south side. |
| 29438 |
11 Jul 2012 @ 0839 |
--- |
research-mab |
7/11/2012 Pool below Ledge nearly dry 0839 [added as Jetsam] |
| 29903 |
15 Jun 1999 @ 1400 |
--- |
research-mab |
6/15 Interesting note: Pool just before Basin Geyser (going down to Porcelain Basin) was empty @2pm on 6/15 – first time I’ve seen it not green & “full”. And at ~4pm going back up I checked it again & it was over full & almost clear – just a little green tinge. |
| 29923 |
06 Apr 1998 @ 1200 |
--- |
research-mab |
4/6/1998 - no time noted - Lots of interesting things going on in Porcelain Basin... We have a new thermal feature! A high pressure, super heated steam vent has broken out on the rim of Jetsam Pool. This vent is part of a large group on the side towards Jetsam and several in the runoff of Ledge. The temp is 97.8 C at the vent and the steam is pretty high pressure. Ledge is in a quiet mode. There has been some kind of change in the water though. The growth in the runoff channel is very new. There is also some interesting deposition near the vent. |
| 30051 |
10 May 1995 @ 1200 |
--- |
research-mab |
Thursday May 10, 1995 - no time noted - Looks like there may be algae growing at Jetsam at least I see green scum on the surface. |
| 30915 |
08 May 1985 @ 1200 |
--- |
research-mab |
Wednesday May 8 1985 - no time noted - Jetsam was clear and light blue; some water flows from the western lip above Basin G. |
| 7617 |
11 Feb 1984 @ 1800 |
--- |
research-mab |
02/11/1984 Jetsam Pool No change in water level due to leakage. Opaque Turbid – light gray brown. |
| 31284 |
06 Jul 1982 @ 1505 |
--- |
research-mab |
July 6 - approx time - The CHANGE in features occurred between 1230 and 1345 – for both basins - Temperatures taken at 1505-1600 :-
Jetsam Pool – 197º, muddy & boiling |
| 31254 |
20 Feb 1982 @ 1200 |
--- |
research-mab |
February 20 1982 - no time noted - Jetsam Pool 174º blue-green slightly turbid H20 with an occasional bubble |
| 31197 |
15 Jan 1982 @ 1200 |
--- |
research-mab |
January 15th, 1982 - no time noted - Jetsam Pool 168º blue-green slightly turbid H20 w/an occasional bubble |
| 31584 |
27 Nov 1981 @ 1200 |
--- |
research-mab |
Nov 27th 1981 - no time noted - Jetsam Pool clear blue water w/slight turbidity, boiling gently 156° |
| 31555 |
12 Sep 1981 @ 1200 |
--- |
research-mab |
Sept 12 1981 - no time noted - Jetsam 189° 2 sm vents bubbl. 1’ high, gray/grn turbid water |
| 31546 |
31 Aug 1981 @ 1200 |
--- |
research-mab |
Monday Aug 31 1981 - no time noted - Jetsam Pool turbid greeny-gray 190° 2 bubbling areas of 4” high |
| 31529 |
17 Aug 1981 @ 1200 |
--- |
research-mab |
Monday 17 August 1981 - no time noted - Jetsam Pool is more active, 1 vent bubbling 8-10” contin. |
| 31795 |
22 Sep 1980 @ 1200 |
--- |
research-mab |
Monday Sept 22, 1980 - no time noted - One week following the disturbance, some porcelain basin observations: Jetsam Pool – Turbid, bubbling 189ºF |
| 31735 |
06 Sep 1980 @ 1200 |
--- |
research-mab |
Sat Sept 6 1980 - no time noted - Jetsam Pool Murky grey-green water. No overflow 180°F |
| 31613 |
08 Jun 1980 @ 1200 |
--- |
research-mab |
June 8 1980 - no time noted - Jetsam Pool – murky blue-grey water, 172ºF |
| 31985 |
27 Sep 1979 @ 1200 |
--- |
research-mab |
September 27 1979 - no time noted - Jetsam Pool – 196ºF. Water level 3 inches below summer mark. Muddy yellow-brown water. |
| 31930 |
11 Sep 1979 @ 1200 |
--- |
research-mab |
Sept 11 1979 -no time noted - Temps taken in Porcelain this AM - Jetsam Pool 169° |
| 32234 |
03 Nov 1978 @ 1200 |
--- |
research-mab |
11/03/1978 - no time noted - down to close the museum, check signs, etc. Jetsam Pool is nearly empty so maybe Ledge has erupted recently. Big Whirly was active. |
| 32205 |
13 Sep 1978 @ 1200 |
--- |
research-mab |
09/13/1978 - no time noted - Jetsam Pool was completely empty today. |
| 32195 |
09 Sep 1978 @ 1200 |
--- |
research-mab |
09/09/1978 - no time noted - Jetsam Pool- grey water – down 8 inches from rim Temperature 158ºF |
| 32185 |
03 Sep 1978 @ 0930 |
--- |
research-mab |
09/03/1978 - Yesterday water in nearby Jetsam down ~2 feet. This am at 930 hrs down only a few inches. Water spray out of Ledge’s NW vent out to ~20 feet |
| 32158 |
18 Aug 1978 @ 1200 |
--- |
research-mab |
08/18/1978 - no time noted - Jetsam Pool has filled up again along with a refilling of vents associated with Ledge- this may add additional evidence that Jetsam is connected to Ledge. [added: Ledge overflows into Jetsam] |
| 32152 |
12 Aug 1978 @ 1200 |
--- |
research-mab |
08/12/1978 - no time noted post Ledge - Also of note water in Jetsam Pool has increased about 1-2 feet in depth while the power of our new unnamed fumerole (Son of Black Growler) seems to have decreased. |
| 32110 |
22 Jun 1978 @ 1200 |
--- |
research-mab |
06/22/1978 - no time noted - Water in Jetsam down about a foot from last year. |
| 32300 |
19 Aug 1977 @ 1200 |
--- |
research-mab |
08/19/1977 - no time noted - -More observations made in the Porcelain Basin once the fog was burned out:
Congress boiling more, Porcelain Terrace Springs seen to be putting out more steam, the features between and including Feisty and Blue Geyser are all muddy. Colloidal boiling in several spots. Jetsam with strong boiling. |
| 5107 |
30 Jun 1977 @ 1800 |
--- |
research-mab |
06/30/1977Jetsam pool has turned into a Sulphur Cauldron today – almost yellow.
The mud pot out by Lewis mudpot has gone completely dry. |
| 32561 |
10 Sep 1976 @ 1200 |
--- |
research-mab |
09/10/1976 - no time noted - Jetsam – nearly clear again – very blue. Still bubbles |
| 32543 |
07 Sep 1976 @ 1200 |
--- |
research-mab |
09/07/1976 - no time noted - Jetsam – back to its usual blue-green color |
| 32536 |
04 Sep 1976 @ 1200 |
--- |
research-mab |
09/04/1976 - no time noted - Jetsam pool is faintly green, still bubbling. |
| 32501 |
27 Aug 1976 @ 1200 |
--- |
research-mab |
08/27/1976 - no time noted - Jetsam Pool (?) was boiling intermittently this afternoon {? mark in log} |
| 32500 |
24 Aug 1976 @ 1930 |
--- |
research-mab |
8-24-1976 - approx time - While walking in Porcelain last night (8-24} at sunset the following activity was observed:1) Jetsam Pool is fluctuating a few inches fills-boils-overflows-recedes |
| 32468 |
05 Aug 1976 @ 1200 |
--- |
research-mab |
08/05/1976 - no time noted - Jetsam Pool as clear as I’ve ever seen it. |
| 32431 |
20 Jul 1976 @ 1200 |
--- |
research-mab |
July 20 1976 - no time noted - Porcelain Basin observations in pm: Jetsam Pool is still muddy, bubbling with some runoff. |
| 32427 |
19 Jul 1976 @ 1200 |
--- |
research-mab |
July 19 1976 - no time noted - Felt what might have been a tremor over at the housing area at 1145 am. There was a low rumble accompanied by a slight snaking & vibrating of the transahome. {A sneeze would shake that place} - Jetsam Pool has become very cloudy. It is bubbling & muddy. |
| 5681 |
02 Sep 1975 @ 1800 |
--- |
research-mab |
09/02/1975
Jetsam Pool – down one foot in water level, Pool is turbid. |
| 5661 |
29 Aug 1975 @ 1800 |
--- |
research-mab |
08/29/1975
Jetsam down 18” |
| 5662 |
28 Aug 1975 @ 1200 |
--- |
research-mab |
08/28/1975 - no time noted - Jetsam down 2’ |
| 32660 |
20 Aug 1975 @ 1900 |
--- |
research-mab |
08/20/1975 - approx time no time noted - Porcelain Basin 7:00 p.m. - Jetsam Pool – Turbid 180º |
| 32634 |
16 Jul 1975 @ 1200 |
--- |
research-mab |
July 16 1075 - no time noted - Jetsam Pool – water level almost recovered within 1 inch of crust. |
| 5605 |
09 Jul 1975 @ 1800 |
--- |
research-mab |
07/09/1975 Jetsam down 2’ (since tremors) |
| 32613 |
05 Jul 1975 @ 1200 |
--- |
research-mab |
07/05/1975 - no time noted - Jetsam pool is also very low. |
| 6179 |
22 Sep 1973 @ 1200 |
--- |
research-mab |
09/22/1973 - no time noted - Congress blue color. Jetsam - clear & green |
| 6138 |
11 Sep 1973 @ 1200 |
--- |
research-mab |
09/11/1973 - no time - Jetsam Pool has returned to a green color. |
| 6084 |
26 Aug 1973 @ 1800 |
--- |
research-mab |
08/26/1973 Jetsam pool still grey |
| 6070 |
20 Aug 1973 @ 1800 |
--- |
research-mab |
08/20/1973 Jetsam Pool is gray instead of Turquoise. |
| 32732 |
18 Mar 1973 @ 1200 |
--- |
research-mab |
03/18/1973 - no time noted - Jetsam Pool Little bubbling in center, continuous discharge 171° |
| 6457 |
10 Sep 1972 @ 1800 |
--- |
research-mab |
09/10/1972
Jetsam Pool – the bubbling activity has ceased on the NW half of the pool & has shifted to the SE. Also, the dark gray runoff channel is being coated in part by a light pinkish flesh colored deposit. |
| 33256 |
10 Aug 1972 @ 1200 |
--- |
research-mab |
Jetsam - no time noted - Grey water after Aug 9 |
| 6504 |
15 May 1972 @ 1800 |
--- |
research-mab |
05/15/1972 Jetsam – milky greenish grey, bubbling 193º |
| 33260 |
15 May 1972 @ 1200 |
--- |
research-mab |
1972 May 15 - no time – 193F Green – clear water, very little bubbling & little overflow |
| 32942 |
11 Sep 1971 @ 1800 |
--- |
research-mab |
09/11/1971 - {afternoon temps 1430-1900} - Jetsam 196° muddy dull gray color, more bubbling, much less runoff |
| 6583 |
09 Sep 1971 @ 1800 |
--- |
research-mab |
09/09/1971 In the evening a tour was made of the basins and additional changes were noted: The water level in Jetsam pool has dropped a little over an inch and as a result, there is less than half the runoff that there was for the past month.
{evening observations} |
| 6578 |
09 Sep 1971 @ 1200 |
--- |
research-mab |
09/09/1971
Jetsam is now a light gray instead of the beautiful sky blue that it has been for many weeks. Also the activity in the pool seems to have increased. {morning} |
| 6562 |
31 Jul 1971 @ 1800 |
--- |
research-mab |
07/31/1971 Jetsam Pool is having a lot more runoff and is becoming a more clear light blue color. |
| 33259 |
31 Jul 1971 @ 1200 |
--- |
research-mab |
1971 July 31 - no time -
Blue opal color water – no eruptions like last year. Water overflowing to west. Boiling action 92C (197F) |
| 6560 |
22 Jul 1971 @ 1800 |
--- |
research-mab |
07/22/1971
Other changes have been noticed around Ledge & Valentine Geyser; one is that the hole in the side of the hill west of Valentine is larger with water in the bottom of it; Jetsam Pool has a greater discharge (over 2X than before the eruption of Ledge, also the point of greatest boiling has shifted in part from east of center to the north west edge and then shifted back again. |
| 6597 |
07 Sep 1970 @ 1800 |
--- |
research-mab |
09/07/1970
Jetsam pool has been starting to clear up in the past couple of weeks, |
| 6618 |
01 Sep 1970 @ 1300 |
--- |
research-mab |
09/01/1970
A survey of pools and geysers in the area made during the {Ledge} eruption showed that Jetsam Pool had a larger volume (3 times) of run-off than usual. Basin was about completely drained with a small amount of water splashing about in the bottom of its fissure.
As I write this at 3:55 there is still a considerable amount of steam still emerging under pressure from the Ledge geyser. |
| 6612 |
15 Jul 1970 @ 1800 |
--- |
research-mab |
07/15/1970
Jepsam pool {Jetsam} is full again, the heavy bubbling activity has shifted toward the middle & east end & the surface has an oily texture. |
| 6611 |
14 Jul 1970 @ 1800 |
--- |
research-mab |
07/14/1970
Jepsam pool {Jetsam} is becoming slightly more active like in June. The water level of the pool which had been practically full for the past couple of weeks appears to have dropped 2-3 inches since yesterday. |
| 33257 |
30 Jun 1970 @ 1200 |
--- |
research-mab |
June 1970 - no time - Jetsam must be getting heat that was at Ledge Geyser last year. Jetsam has changed from a placid green-blue pool to a gray muddy geyser-like spring. The geyser activity has thrown water up to 10 & 15 feet into the air- much muddy water has been put into the drainage, from the Porcelain Basin. [NOTE no date included in Thermal Record ~ EOM] |
| 6608 |
21 Jun 1970 @ 1800 |
--- |
research-mab |
06/21/1970
{Jetsam} is very full but height of eruption down. {no time} |
| 6607 |
20 Jun 1970 @ 0730 |
--- |
research-mab |
06/20/1970
Jepsam pool {Jetsam} up to level which covers the pool floor. Porcelain drainage stream below it was very muddy again. |
| 6606 |
19 Jun 1970 @ 1800 |
--- |
research-mab |
06/19/1970
Jepsen Pool {Jetsam} ejected muddy water 20-30 feet in AM, water level down considerably but up almost to June 18 level at 9:45PM. Porcelain drainage cloudy in AM, clear at 9:25 PM |