| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 22300 |
01 Jul 2022 @ 1201 |
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MAB |
Boiling water/vents at the base of roadbed east of Incline G - could be waters from Nuphar meeting a steamvent or an actual thermal breakout - not noticed 4 days earlier |
| 22160 |
27 Jun 2022 @ 1210 |
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MAB |
Nuphar groundwaters still flowing out base of old road bed below sign but similar spot nearest Incline has ceased leaving dried green growth - other Nuphar notes are under event non geyser related |
| 18037 |
22 Jun 2021 @ 1410 |
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MAB |
Incline area is sinter clogged - w lack of water flowing down from Porcelain Spgs it is super dry with many very noisy hissing vents |
| 10366 |
17 Sep 2018 @ 0845 |
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Siegmund |
Flooded. Pool full of milky water. No boiling. Adjacent UNNGs active. |
| 8762 |
18 Jun 2018 @ 1019 |
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JSJ |
No spouting, but noisy fumaroles in area. |
| 4236 |
06 Jun 2017 @ 1145 |
06 Jun 2017 @ 1925 |
JSJ |
Incline Geyser was active from 10 vents, plus from a fracture zone next to the base of the hillside. |
| 1175 |
07 Jul 2014 @ 0000 |
07 Jul 2014 @ 2359 |
JSJ |
In eruption - doing the perpetual spouting thing (it wasn't doing that in early June 2014 during my previous visit). Five erupting vents observed. |
| 1196 |
02 Jun 2014 @ 1200 |
02 Jun 2014 @ 1800 |
JSJ |
None of Incline Geyser's vents is erupting - mostly bare whitish geyserite present. Water levels in all vents (except one) not visible. Visible low water level in one of the larger northern vents - observed in the late afternoon on 2 June 2014. |
| 7044 |
12 Oct 1992 @ 1630 |
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JarnoO |
just ended |
| 4706 |
11 Mar 1990 @ 1200 |
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research-mab |
3/11/1990 Our new geyser has actually expanded a crater that was about 10 x 13’ last summer. We saw frequent small eruptions from it (just within its crater). It seems that about 5 minutes before an eruption now there are light splashes and the steam vent near it increase in activity |
| 4705 |
10 Mar 1990 @ 1200 |
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research-mab |
3/10/1990 ...erupts obliquely to the east (about 60º), height 60-80’. A second vent erupts to the west about 15’ high. The eastern jet is eroding the hillside away and washing sinter gravels (2-3”) into the geyser’s vent. Duration is 35-45 seconds. whittlesey |
| 10934 |
23 Feb 1990 @ 1200 |
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research-mab |
2/231990 {no time given}
Activity 1st seen by Arden Bailey |
| 4698 |
02 Jul 1988 @ 1800 |
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research-mab |
7/2/1988 INCLINE In Porcelain Springs terrace area - there is a large area submerged now that drains into the big hole exploded in 1983 (?)
Also the eruption doesn’t occur from the hole, but rather from several vents on the south side. |
| 4689 |
24 May 1987 @ 1800 |
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research-mab |
5/24/1987 NOTE INCLINE Constant had a 2 burst eruption today. Whirligig erupted once, Splutter pot often. The “Blowout” Geyser is erupting, and has a number of new companions. |
| 7681 |
26 Jun 1986 @ 1800 |
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research-mab |
6-26-1986
Unnamed 1983 Outbreak in SE corner of Porcelain Basin. Sinter slab & fragments in vent are stained black to very dark maroon & red. Vent is continuous spouter deflected by sinter sheet slab roof with opalescent blue water down ~1m. High frequency vibration of sinter sheet roof at north edge of crater. T=200º |
| 7679 |
12 Feb 1986 @ 1100 |
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research-mab |
02/12/1986 Ruptured sinter sheet, SE corner of Porcelain Basin. Occurred between 2-6 & 2-11-83.
Center of vent (26’) 7.9m from base of slope of old roadway.
Maximum height 3-6 meters.
Water drains into collapse pit of 1972 basin-wide disturbance at base of slope about 12m to the SW.
Maximum thickness of ruptured sinter is 12cm.
Water is turbid dark gray.
L 21 1/2” major rupture W 25’ 7.6m
33’8” 10-3m Vent 5’ 1.5m
Vent to south end of 71 blow-out 20.7m
Vent to drain at base of slope 50’ 15.2m |
| 4840 |
03 Jul 1985 @ 1900 |
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research-mab |
7/3/1985 Each eruption was very short-lasting 15 to 30 seconds only. Since the eruption vent is still under the overlying rock so when it spouts the water is forced to the sides – some of the water comes up thru the nearby cracks to maybe 1 to 2 feet high. Most of the water though is shot across the blowout hole maybe 4 to 5 feet or so. You can see the water starting to erupt under the rock – 5 seconds or so before it comes up above the rock. |
| 7629 |
11 Feb 1984 @ 1140 |
11 Feb 1984 @ 1211 |
research-mab |
02/11/1984 Each eruption was a steamy heavy spray emerging from under the northeast ledge or rim which was ejected horizontally to the south for a distance of approximately 5 meters.
A barely perceptible rise in water level of less than 5 cm with an increase in horizontal flow of superheated bubbles across the pools surface form the northeast rim was the only sign that the next play was imminent. Mid interval activity was continuous splashing 0.4-1.2m from the central east portion of the cloudy dark blue gray pool. |
| 4670 |
22 Aug 1983 @ 1730 |
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research-mab |
8/22/1983 Blowout - The geyser constantly splashed from an empty pool until often before an eruption a noticeable build up of steam occurred. The normal splashing stopped soon after that and the pool began to fill rapidly from a long crack in the side of the crater, sort of like a waterfall. When the pool filled an eruption began from the crack with water being thrown violently out to the side and splashed out a few feet.
After the eruption normal, but higher, upright splashing started again from the full pool and lessened in height to normal as the pool drained. |
| 4672 |
17 Aug 1983 @ 1730 |
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research-mab |
(more info than the raw times-mab)
Log:
New Geyser in Porcelain Basin (Blowout?)
Started observing at 1345 (8/17)
At this time it was continually spouting with bursts coming out at a sharp angle.
1408:15 – spouting stopped and “draining” sound was heard
1408:23 – a loud jet of steam came out
1409:30 – steam stopped and the pool filled to the top.
1409:51 – a “major” eruption began – the water erupted straight up higher than the normal spouting
1411- normal spouting began- no pause at the end of the major (blended together)
Majors like the one described except there was no jet of steam (pool filled)
1459:15 d=~2m, 1520:06 d=~2m, 1550:10 d=~2m, 1618:01 d=~2m
1645:32 – jet of steam till 1649:28 Duration – 3m56sec
Interval from last steam – 2h37m09s
1649:34 – major began 1659 major ended
approx 10 min duration, interval 31m32s
Start: 1719:17 end 1721 – d= approx 2min. |
| 7675 |
10 Mar 1983 @ 1515 |
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research-mab |
03/10/1983 The area was left for a brief period between eruptions c and d, a minor eruption may have occurred during that time. |
| 7674 |
10 Mar 1983 @ 1430 |
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research-mab |
3-10-83 Activity of new geyser outbreak which broke out early in the week of 2-06-83 is irregular with less (est 50-60%) discharge. In late February (2/25?) Snow Coach Driver & summer Mammoth seasonal naturalist Arden B reported durations of 68 & 75 seconds, less discharge & lower heights of play. Today’s activity is as follows:
Time Duration Interval |
| 7667 |
05 Mar 1983 @ 1100 |
05 Mar 1983 @ 1140 |
research-mab |
03/05/1983 Incline ~ *Max height ~3 meters |
| 4666 |
19 Feb 1983 @ 1100 |
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research-mab |
2/19/1983 (Discovered Feb 12 by Fred Hirschmann)
Rick Hutchinson and I (Cheryl B) quickly came to see the new addition. At the time of the discovery it was erupting every 20-29 minutes (average of 24 minutes) & about 20 feet high. The amount of discharge was estimated at 3-4 gallons per second.
It was like a wave on the beach. The discharge flows into a large depression that is ~2 yrs old right at the base of the hill. Fine new addition to the geysers there in Porc.
A week later I was checking the new geyser & the changes were very noticeable. The interval had shortened & the crater more than doubled in size. Previously it was ~2’ in diameter but now it was crescent shaped & about 6-7’ long. The “dark part of the moon” was undermined & falling in. The area doesn’t look very stable at all. |