| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 30887 |
22 Aug 1987 @ 1200 |
--- |
research-mab |
8/22/1987 - no times noted - Bear Den is erupting – having seen bursts of steam through the trees from a distance. |
| 30859 |
13 Jul 1987 @ 1200 |
--- |
research-mab |
Mon 7/13/1987 - no time noted - Bear Den erupted today – seen by a visitor |
| 33470 |
02 May 1987 @ 1200 |
--- |
research-mab |
May 2, 1987 - no time noted - Bear Den Geyser– No evidence of an eruption in last week. I had placed a marker in the ground in front of the vent, and it is still there!
Ebony geyser– Loud gurgles, no water visible. |
| 33436 |
06 Oct 1986 @ 1200 |
--- |
research-mab |
October 6, 1986 - no time noted - *BEAR’S DEN and EBONY are quiet… Ebony quieter than usual. |
| 4847 |
19 Aug 1985 @ 2100 |
--- |
research-mab |
Bear Den 8/19/1985: Interesting Note: Bear Den would always make deep rumbling soon before it erupts & the water (greenish looking) in Ebony Geyser would come to the surface. On the long intervals 5 hours or so- Bear Den Geyser would rumble & so forth first would not erupt – always 3 to 3 ½ hours from the previous eruption. |
| 4845 |
07 Jul 1985 @ 0818 |
--- |
research-mab |
BEAR DEN 7/7/1985 Also at 8:18 a.m. - water shot out briefly in one spurt/burst to 5 to 10 feet then back in its hole. Most of the eruptions, the first bursts were smaller while the middle and later ones were bigger. The height in the bursts were up to 50 to 70 feet. About 1 minute or so before the eruption, there was a loud brief gurgling sound from deep within the Geyser. |
| 4667 |
30 May 1983 @ 1800 |
--- |
research-mab |
5/30/1983 V.R. (reliable geyser gazer) that Bear Den had all the normal preliminary signs of a typical eruption except that all that happened was one, 1’ splash. |
| 31217 |
15 Jan 1982 @ 1200 |
--- |
research-mab |
January 15th, 1982 - no time noted - Bear Den Geyser 116º air temp taken 3’ down . No H20 audible but feature is still erupting |
| 31599 |
11 Dec 1981 @ 1200 |
--- |
research-mab |
Dec 11 1981 - no time noted - Bear Den 120º gently steaming between eruptions, lots of noisy splashing heard deep within. |
| 31514 |
13 Aug 1981 @ 0845 |
--- |
research-mab |
Aug 13 1981 Bear Den’s channel puddly + wet at 0845 am |
| 4619 |
27 Sep 1980 @ 1800 |
--- |
research-mab |
9/27/1980 Bear Den Geyser – has been erupting turbid gray water |
| 4852 |
07 Aug 1980 @ 1800 |
--- |
research-mab |
08/07/1980
(NOTE: not dated in log)
BEAR DEN SUMMARY - (TV)
Average duration: 2:10
Average # bursts: 11
Maximum # bursts: 18
Minimum # bursts: 7
Maximum duration: 2:28
Minimum duration: 0:56
Avg. Intr. Between bursts: 9:49
Minimum variance: +15.5, -7.5
Avg intr between eruptions: 2:34:50
Maximum variance +0:06:01, -3:28
Avg Intr between steam: 2:36:54
Max. Variance: +3:54, -4.57
Avg Intr. Steam-erupt: 1:15:17
Max Variance +1:20, - 2:01
Avg Intr Erupt-steam: 1:17:49
Max variance +2:31, -1:15 |
| 4594 |
04 Aug 1980 @ 1100 |
--- |
research-mab |
Aug 4 1980 Ebony NOTE: after an eruption of Bear Den Ebony Geyser is quiet and then slowly builds up, making a chug[g]ing noise. This noise grows stronger and slows down from as high as 8’s a minute to 4-5 minutes before an eruption of Bear Den, Ebony will become totally quiet. Before a steam puff Ebony stops later, and not so completely 10-15 seconds before a steam puff Ebony may start to splash heavily inside the crater like a small eruption, and emit more steam |
| 4975 |
12 Jun 1980 @ 1045 |
--- |
research-mab |
06/12/1980 NOTE- there is conflicting info in Log: “Bear Den went again, sometime around 10:30-11:00 producing a interval between 1 ½ hrs to 2 hrs.” 1008 was inserted later from a different observer- with burst count seemed like a solid time. mab |
| 31953 |
20 Sep 1979 @ 1800 |
--- |
research-mab |
Thursday Sept 20 1979 - Disturbance check after 1730 - Bear Den Geyser – Active with clear water, but eruption not observed. |
| 5001 |
10 Sep 1979 @ 1200 |
--- |
research-mab |
09/10/1979 - no time noted - Bear Den is apparently a more complicated geyser than we think. While standing at the vent dangling the thermometer into the cavern inside, Bear Den began a bubbling sound. I immediately ran away from the vent just in time to avoid a single 10’ splash. No other play, no water apparent even 10’ down. Perhaps it doesn’t like getting its throat tickled. |
| 5007 |
25 May 1979 @ 1800 |
--- |
research-mab |
May 25 1979 Bear Den Seems quite active with eruptions maybe 3-4 hours apart. |
| 32168 |
18 Aug 1978 @ 1200 |
--- |
research-mab |
08/18/1978 - no times noted - Blue Geyser -Fireball -Africa – Dark Cavern- Splutter Pot – Constant – Bear Den – Big Whirligig – Moxie {<-- bracket} All active this afternoon. |
| 32045 |
25 Mar 1978 @ 1200 |
--- |
research-mab |
March 25 1978 - no time noted - Bear Den – vent & runoff channel wet at 1030, indicating a recent eruption. |
| 32031 |
07 Mar 1978 @ 1200 |
--- |
research-mab |
Tuesday March 7 1978 - no time noted - Geysers observed in eruption today were: Bear Den, Feisty, L. Whirligig, Dark Cavern (minor) ie no discharge, Constant, Growler (C.S.) Splutterpot, Fireball, Unnamed, north end of Porcelain Terrace, Africa, Steamboat (minor) Blue, Echinus |
| 5746 |
11 Aug 1974 @ 1800 |
--- |
research-mab |
08/11/1974 Bear Den: active today |
| 32710 |
27 Jul 1974 @ 0951 |
--- |
research-mab |
07/27/1974 - -Bear Den 0951 not an eruption but ground wet and Ebony bubbling much. |
| 5732 |
20 Jul 1974 @ 1800 |
--- |
research-mab |
07/20/1974 Bear Den active today. |
| 32708 |
14 Jul 1974 @ 0945 |
--- |
research-mab |
07/14/1974 Bear Den dry as a bone. |
| 32698 |
17 Jun 1974 @ 1559 |
--- |
research-mab |
06/17/1974 1559 Bear Den area and runoff is dry as if it hasn’t erupted in several days) |
| 32852 |
26 Sep 1973 @ 1200 |
--- |
research-mab |
9/26/1973 - no time noted - Temps taken today - Bear Den 128º in waterless vent, ~5 min after eruption |
| 6034 |
10 Jul 1973 @ 1800 |
--- |
research-mab |
07/10/1973 Runoff channel from Bear Den was wet -- apparently it resumed eruptive activity without a large eruption of Ebony (or so it appears) {no time} |
| 6011 |
12 Jun 1973 @ 1800 |
--- |
research-mab |
06/12/1973 {no time}
Bear Den had some warm H20 in run-off channel played only several minutes previous |
| 6018 |
24 Apr 1973 @ 1500 |
--- |
research-mab |
04/24/1973 Observations were ended after 300pm due to the poor visibility and wet conditions. The large rock which is now lying in front of the vent has seriously altered the style or character of Bear Den’s eruptions. They seem to be of shorter durations & less height. Boiling at depth could be heard from the vent for well over a minute after the last bursts- which is an unusually long time. Angle of play of the water bursts varied between 40 and 50º) |
| 6016 |
23 Apr 1973 @ 0800 |
--- |
research-mab |
04/23/1973 Bear Den Geyser played during the night, thus ending a period of about 50 hours of inactivity. {general a.m. time} |
| 6205 |
22 Apr 1973 @ 0000 |
--- |
research-mab |
04/22/1973 Bear Den has not played since Friday. {no time} |
| 5972 |
21 Apr 1973 @ 0800 |
--- |
research-mab |
04/21/1973 Bear Den: From the snow in the runoff channel it was apparent that Bear Den Geyser did not play at all last night. In addition its runoff channel remained dry all day today. This was due to the activity of Ebony.
{no time-morning check} |
| 5926 |
24 Mar 1973 @ 1800 |
--- |
research-mab |
03/24/1973 Since it has been established during the previous weeks that Bear Den (except briefly while Ebony was active) and Feisty Geysers (currently) have intervals between eruptions which are normally no more than 8 hours – at the very most, it is no longer deemed necessary to replace markers in their runoff channels. Normal observations will be maintained on them with the other features to detect if their eruptive pattern changes however. |
| 6485 |
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} |
| 6480 |
25 Jul 1972 @ 1100 |
--- |
research-mab |
07/25/1972 BEAR DEN “No eruption until at least 11” |
| 6355 |
24 Jul 1972 @ 1800 |
--- |
research-mab |
07/24/1972
Bear Den erupted with 13 bursts – Ebony filled but no run-off {no time noted} |
| 6348 |
08 Jul 1972 @ 1200 |
--- |
research-mab |
07/08/1972 {No time- around noonish} Two visitors reported seeing Bear Den go off. In both cases they were watching Ebony build up then they noticed Bear Den began to play. |
| 6319 |
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 |
| 6500 |
15 May 1972 @ 1800 |
--- |
research-mab |
05/15/1972 Bear Den – erupts as last year, several times daily, temp of steam in fissure 192º |
| 33252 |
31 Jul 1971 @ 1200 |
--- |
research-mab |
1971 July 31 - no time noted - Ebony played on June 8 (space left for time blank), no other play all summer. 94C 201F
= Bear Den has played about every two to four hours. |
| 6558 |
16 Jul 1971 @ 1005 |
16 Jul 1971 @ 1835 |
research-mab |
07/16/1971 {markers replaced} Bear Den and Valentine 5:55p, Bear Den replaced 10:05, also at 6:35p |
| 6550 |
30 Jun 1971 @ 0915 |
--- |
research-mab |
NOTE: Logs have frequent and specific daily or hourly notes of replacing markers - Ledge, Valentine, Guardian, Ebony and Bear Den. I will include only those that might indicate intervals. MAB
06/30/1971 Replaced Bear Den at 9:15 all others ok. Replaced Bear Den 1230 |
| 6549 |
24 Jun 1971 @ 1200 |
--- |
research-mab |
06/24/1971 Bear Den channel clean in front of tile under trail, channel was full of water from an eruption sometime during the previous 15 minutes. {morning-no time} |
| 6599 |
30 Aug 1970 @ 1800 |
--- |
research-mab |
08/30/1970 Bear Den {markers} replaced 820, 1455, 1830 |
| 6615 |
21 Aug 1970 @ 1400 |
--- |
research-mab |
08/22/1970
Bear Den and Ebony markers replaced – visitor reported seeing Ebony and Bear Den go early in afternoon 8-21 {time not noted} |
| 6600 |
09 Aug 1970 @ 1800 |
--- |
research-mab |
08/09/1970
Bear Den {markers} replaced 0820, 1115 |
| 6601 |
08 Aug 1970 @ 1800 |
--- |
research-mab |
08/08/1970 Bear Den marker replaced 1105, 1545, 1835 |
| 6616 |
03 Aug 1970 @ 0810 |
03 Aug 1970 @ 1435 |
research-mab |
08/03/1970
Ebony and Bear Den markers replaced 8:10. Ebony run-off channel still wet.
Bear Den replaced 2:35pm |
| 6602 |
26 Jul 1970 @ 1800 |
--- |
research-mab |
07/26/1970
Bear Den markers replaced 0830, 1220, 1420, 1820 |
| 6591 |
26 Jun 1970 @ 1800 |
--- |
research-mab |
06/26/1970
Bear Den {markers} replaced 8:45, 5:50 |
| 6592 |
25 Jun 1970 @ 1800 |
--- |
research-mab |
06/25/1970 Bear Den replaced 08:20, 3:45, 6:35 |
| 33250 |
25 Jun 1970 @ 1200 |
--- |
research-mab |
June 1970 - no time noted - Ebony has only played twice in June (as of the 25th) Bear Den has been playing about twice a day (8 hrs) The Bear Den has received the heat that all the rocks in Ebony have plugged off.
= Ebony air 65 water 200F
Bear Den runoff water at forks. 143F |
| 6604 |
21 Jun 1970 @ 1800 |
--- |
research-mab |
06/21/1970
Replaced Bear Den marker 0910, 1455 |
| 6603 |
18 Jun 1970 @ 1800 |
--- |
research-mab |
06/18/1970 Bear Den markers replaced 0830, 1000, 1430, 1700 |
| 6586 |
03 Jun 1970 @ 1030 |
--- |
research-mab |
06/03/1970 Bear Den replaced 10:30 and 4:30 NOTE: Markers checked several times a day – I will only include some that might have interval information -mab |
| 33361 |
26 Jun 1969 @ 1200 |
--- |
research-mab |
June 26 1969 – no time - Playing about every six to 12 hours – or at least twice every 20 hours. 192ºF water 3 feet down in vent, but no bubbling action. Bear Den is playing more than Ebony I wonder if all the rocks in Ebony is doing this? |
| 7479 |
19 Sep 1968 @ 1530 |
--- |
research-mab |
09/19/1968
Replaced markers on Ebony & Bear Den 3:30p
Bear Den erupts several times a day. Most eruptions completely remove the marker below the Y formed by the runoff of Ebony & Bear Den. I think Ebony has been erupting less frequently than we have been led to believe this summer. We were under the impression that one marker would suffice, believing that Bear Den did not produce enough water to remove the large marker below the Y. |
| 32992 |
15 Sep 1968 @ 1330 |
--- |
research-mab |
09/15/1968 - replaced markers on Ebony & Bear Den at 1:30 p.m. Replaced Bear Den marker at 4:30 pm. - NOTE mab this is just one example of markers being replaced as noted in logbooks daily. This one is included with a clear Bear Den inferred interval. |
| 7109 |
10 Jul 1966 @ 1800 |
--- |
research-mab |
07/10/1966
All afternoon Bear Den went after each interval of Ebony without fail (B.L.) |
| 6888 |
21 Jun 1965 @ 1800 |
--- |
research-mab |
06/21/1965 Bear Den – 15-25 minutes between intervals (25 ft) |
| 6835 |
03 Aug 1964 @ 1800 |
--- |
research-mab |
08/03/1964 Ebony had its first minor eruption today without Unnamed {Bear Den} playing Height 4 ft. duration 2 min {no specific time noted} |
| 33572 |
28 Jun 1961 @ 1200 |
--- |
research-mab |
- no times noted - Ebony has been observed several times but no other data is noted.
= The geyser in the alcove just east of Ebony has been observed playing once. |