| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 22395 |
08 Jul 2022 @ 0944 |
08 Jul 2022 @ 1125 |
cb |
low level blips |
| 22243 |
30 Jun 2022 @ 1052 |
--- |
cb |
start of low level (just visable) blips. |
| 21491 |
25 May 2022 @ 1007 |
--- |
Graham |
Boiled up but then quit. |
| 20276 |
03 Nov 2021 @ 0828 |
03 Nov 2021 @ 1612 |
MAB |
morphed between low burps and more robust bursts of maaaybe 15in all day with a few seconds of quiet - may be regular but didn't track it closely |
| 20178 |
28 Oct 2021 @ 0840 |
28 Oct 2021 @ 1522 |
MAB |
low burble all day - puts out enough water to steam up the runoff channel - a few times it built a few inches higher like typically pre start but no go |
| 20117 |
24 Oct 2021 @ 0855 |
24 Oct 2021 @ 0921 |
MAB |
Low burbling while in the area |
| 19951 |
10 Oct 2021 @ 0852 |
--- |
MAB |
low burbling while in the area - didn't build any higher that I saw |
| 18306 |
07 Jul 2021 @ 0939 |
--- |
cb |
looks recently post eruptive. very wet runoff channel and gently steaming. |
| 18038 |
22 Jun 2021 @ 1232 |
--- |
MAB |
visible burbles after 0900 which
slowed by 1000 - viewed from above 1232 vent area has water but is not overflowing |
| 17717 |
12 Jun 2021 @ 1900 |
--- |
MAB |
Tiny burbles visible from above - runoff channel damp most of the way to Colloidal |
| 17544 |
07 Jun 2021 @ 0902 |
--- |
MAB |
Saw Arsenic burbling in the morning but it never progressed - coming back from Nuphar @ 1800 water is visible around the vent and down the channel but no steam |
| 17074 |
12 May 2021 @ 0936 |
--- |
MAB |
heavy steam in channel all the way to Colloidal- must have just finished |
| 8004 |
26 Apr 2018 @ 1127 |
--- |
Micah Kipple |
It's having very frequent splashing 10-20 cm but am only entering true jetting eruptions. |
| 4171 |
31 May 2017 @ 1200 |
--- |
kc |
Arsenic was on and off all afternoon with durations ranging from 1 to 5 minutes. |
| 3987 |
21 Apr 2017 @ 0956 |
21 Apr 2017 @ 1022 |
MAB |
Appears to start, but never reaches full height. Not closed intervals as it was very steamy and I was walking around the lower loop. |
| 2398 |
21 Sep 2015 @ 0930 |
21 Sep 2015 @ 1410 |
MAB |
Burbling and looking pre-eruptive for 4 hours, no eruption seen. Same for the afternoon visit from 1641 - 1750 |
| 2380 |
18 Sep 2015 @ 0603 |
--- |
MAB |
I had a good handle on Arsenic pre-disturbance. It has skunked me the last 4 visits, sometimes burbling and looking quite pre-eruptive. Jake may have seen the last one for a while! I will start noting the burbles that are about 4" and see if they fit the interval pattern from earlier this month. I hope I am just unlucky and am missing them. |
| 3756 |
15 Aug 2015 @ 0941 |
--- |
jh23487 |
Arsenic was either erupting or bubbling a little, not very tall. Possibly at the end of an eruption. |
| 4696 |
02 Jul 1988 @ 1800 |
--- |
research-mab |
7/2/1988 Also, Arsenic geyser is erupting this summer. |
| 7638 |
26 Jun 1986 @ 1800 |
--- |
research-mab |
6-26-1986 Arsenic Geyser – Active. Clear, full, boiling before eruption. T=201º |
| 7604 |
11 Feb 1984 @ 1800 |
--- |
research-mab |
2-11-84
Arsenic Geyser active. |
| 5367 |
11 Aug 1983 @ 1800 |
--- |
research-mab |
8/11/1983 Arsenic Fireball Splutterpot in simultaneous eruption
{time unknown} |
| 4643 |
14 Aug 1981 @ 1900 |
--- |
research-mab |
8/14/1981 Arsenic Geyser is in perpetual spluttering as is Moxie and 2 other small spouters. Fireball is somewhat weak. GS |
| 4644 |
14 Aug 1981 @ 1900 |
--- |
research-mab |
8/14/1981 Arsenic Geyser is in perpetual spluttering as is Moxie and 2 other small spouters. Fireball is somewhat weak. GS |
| 4645 |
14 Aug 1981 @ 1900 |
--- |
research-mab |
8/14/1981 Arsenic Geyser is in perpetual spluttering as is Moxie and 2 other small spouters. Fireball is somewhat weak. GS |
| 4615 |
22 Sep 1980 @ 1800 |
--- |
research-mab |
9/22/1980 Arsenic Geyser – in a low eruption a good share of the day ie 204ºF |
| 4762 |
22 Jul 1980 @ 1315 |
22 Jul 1980 @ 1330 |
research-mab |
7/22/80 Porcelain 1:15-1:30
-Arsenic – constant, one to two feet |
| 5133 |
01 Jun 1980 @ 1800 |
--- |
research-mab |
06/01/1980 Arsenic was observed in two different eruptions to 5’. (no times) |
| 4989 |
26 Sep 1979 @ 1800 |
--- |
research-mab |
09/26/1979 Arsenic and Acute Spouter continue their small, perpetual eruptions. Ledge still puffing away with steam. ‘ |
| 5065 |
21 Sep 1979 @ 1800 |
--- |
research-mab |
09/21/1979 Africa, Fireball, Arsenic and Geyser north of Constant all perpetual spouters. {probably Acute Spouter?-mab} |
| 5060 |
15 Aug 1979 @ 1800 |
--- |
research-mab |
08/15/1979 Five geysers erupted in concert today down in the Porcelain Basin Arsenic, Africa, Fireball, Little Wirlygig, and Constant.
A new small geyser (sideways) erupted 1 foot today on the eastern side of Constant. {probably Acute spouter?- mab} |
| 4967 |
01 Jul 1978 @ 1110 |
--- |
research-mab |
07/01/1978 Good activity out of Porcelain this morning. Between 1000 am and 1110 am geysers in eruption included Fireball, Africa, Blue, Dark Cavern, Big Whirligig (twice), Constant (twice) and * Arsenic Geyser (10 min+). *Today was the first recorded observation of this geyser in eruption recorded this summer. |
| 5116 |
19 Aug 1977 @ 1800 |
--- |
research-mab |
08/19/1977 Arsenic splashing up to 15” high, much as it did for most of last year. |
| 5239 |
07 Sep 1976 @ 1800 |
--- |
research-mab |
09/07/1976 Arsenic – mainly steam |
| 5271 |
28 Jul 1976 @ 0900 |
--- |
research-mab |
07/28/1976 Ragged & Arsenic both active as usual at 9:00 |
| 5554 |
20 Jul 1976 @ 1800 |
--- |
research-mab |
07/20/1976 Arsenic & Fireball continue their nearly constant type of activity, but the intensity of the activity varies. |
| 5535 |
29 Jun 1976 @ 1540 |
29 Jun 1976 @ 1600 |
research-mab |
06/29/1976 Arsenic, Moxie & Pinto erupting simultaneously from 3:40 -4:00 |
| 5863 |
28 Jun 1976 @ 1550 |
28 Jun 1976 @ 1610 |
research-mab |
Arsenic Geyser erupting constantly during above interval. |
| 5836 |
21 Sep 1974 @ 1428 |
--- |
research-mab |
09/21/1974 1428 Africa quits, now only Arsenic {noted as Geezer in log} is erupting (3’) |
| 6203 |
26 Sep 1973 @ 1800 |
--- |
research-mab |
09/26/1973
Temperatures taken yesterday
Arsenic Geyser 200 – not erupting
{included here since it’s not mentioned much this year-mab} |
| 5925 |
17 Mar 1973 @ 0800 |
--- |
research-mab |
03/17/1973 Arsenic was in its “steam phase” during all of this time.{written in morning section of log} |
| 5912 |
12 Mar 1973 @ 1200 |
12 Mar 1973 @ 1815 |
research-mab |
03/12/1973 Arsenic The water level was seen throughout the morning and early afternoon to be gradually rising in the vent. Accompanying the filling was continuous minor play with splashing originating at the northeastern end. During the afternoon the minor play became gradually more vigorous with water occasionally splashing out. At 1342 the last 3-4 inches to the top of the vent rapidly filled and was accompanied by the splashing changing into a series of fountain-like jets with massive overflow & runoff. After 9 minutes of play the water bursts became intermittent & more mixed with steam to end the true water phase.
At 1445 the “steam phase” was still in progress with occasional bursts up to 2-3 feet, while at 1610 all play had ceased. A second phase of activity began sometime between 4:30 and 4:40, with the new “steam phase” beginning at approximately 4:45 and running to approximately 6:15. |
| 5910 |
10 Mar 1973 @ 1635 |
--- |
research-mab |
03/10/1973 At 4:35 Feisty, dark Cavern, Africa, Little Whirligig, Fireball, Blue, Arsenic, and Constant Geyser were all seen to be playing at the same time. (for 10-15 seconds due to the very short duration of Constant) Four playing together is not unusual but 8 is. |
| 6489 |
11 Sep 1972 @ 1200 |
--- |
research-mab |
09/11/1972
Bear Den, Dark Cavern, Africa. L. Whirligig, Blue, Fireball & Arsenic all have been observed in eruption this morning. {generic a.m. time} |
| 6428 |
19 Aug 1972 @ 1800 |
--- |
research-mab |
08/19/1972 Little Whirligig, arsenic, & Africa are still playing continuously. Ledge still has intermittent spray type minor play. |
| 6398 |
15 Aug 1972 @ 1800 |
--- |
research-mab |
08/15/1972
Arsenic – still in constant eruption, spraying water to a height of 5-7 feet. |
| 6396 |
14 Aug 1972 @ 1800 |
--- |
research-mab |
08/14/1972
L. Whirligig & Arsenic are still in continuous eruption. |
| 6387 |
12 Aug 1972 @ 1800 |
--- |
research-mab |
08/12/1972 Arsenic & Little Whirligig have not been observed to quit yet. |
| 7866 |
09 Aug 1972 @ 0800 |
09 Aug 1972 @ 1800 |
research-mab |
8/9/1972 Arsenic Geyser in constant 2-8’ eruption all day (before 8:00am to after 6:00 pm) normal 3-4 hours |
| 6350 |
23 Jul 1972 @ 1400 |
--- |
research-mab |
07/23/1972
At the end of the 1:30 walk there were 6 geysers in simultaneous eruption – Blue, Iris, Fireball, Arsenic, Africa and Little Whirligig. |
| 6334 |
08 Jun 1972 @ 1548 |
--- |
research-mab |
06/08/1972
Africa, Bear Den, Ledge, L. Whirligig, Arsenic and Possibly Blue (crossed out “Iris”) were all erupting at the same time at 3:48 |
| 6498 |
15 May 1972 @ 1800 |
--- |
research-mab |
05/15/1972 Arsenic geyser – have not noticed an eruption 148º |
| 7670 |
12 Aug 1970 @ 1800 |
--- |
research-mab |
08/12/1970
Much activity in Porcelain in late pm (6-7)
Arsenic, Fireball, and Fan went off in succession.
8/12/1970 Dark Cavern had extended eruption also. |
| 7088 |
28 Jun 1966 @ 1800 |
--- |
research-mab |
06/28/1966
Fireball & Arsenic both active this afternoon. |
| 6797 |
24 Oct 1964 @ 1800 |
--- |
research-mab |
10/24/1964
Arsenic is sloshing around but not erupting over the lip. |
| 6775 |
17 Oct 1964 @ 1800 |
--- |
research-mab |
10/17/1964 Fan {FIREBALL} & Arsenic are weak. |
| 6772 |
16 Oct 1964 @ 1800 |
--- |
research-mab |
10/16/1964 Fan {FIREBALL} & Arsenic are occasionally quiet & very weak. |
| 6747 |
09 Oct 1964 @ 1800 |
--- |
research-mab |
10/09/1964 The small geysers (Fan, Arsenic, Fireball {PINTO} etc) are still continuously active but are weak. |
| 6710 |
05 Oct 1964 @ 1800 |
--- |
research-mab |
10/05/1964
Porcelain Basin observed from 3:30 pm to 4:30 pm
Arsenic & Fan are continuously active but weak. |
| 6705 |
04 Oct 1964 @ 1800 |
--- |
research-mab |
10/04/1964 Arsenic, Fan and Fireball {PINTO} are still steadily active. |
| 6789 |
03 Oct 1964 @ 1800 |
--- |
research-mab |
10/03/1964 The little geysers within the boardwalk loop (Arsenic, Fan {today’s FIREBALL}, Fireball {today’s PINTO}) have been continuously active all day. |