| Note ID | Start Time (US/Mountain) | End Time (US/Mountain) | Entrant | Note |
| 13690 |
14 Sep 2019 @ 1342 |
14 Sep 2019 @ 1404 |
Polly |
River (& Angle) off upon arrival. BV spritz intermittent & could see the tops of int splashes in LM. 1348 R on. MV had light intermittent steam which continued. 1356 A then G on. High had some 2-3’ bursts. |
| 13613 |
07 Sep 2019 @ 1150 |
07 Sep 2019 @ 1311 |
EmilyW |
Was on for the entire time I was there until off at 1231. Off until river back on at 1258 with some water in Mortar in between. Gold 1304
Angle 1308
On for more then it’s off. Water never there. Very bleh cycle. |
| 13600 |
05 Sep 2019 @ 1209 |
--- |
Polly |
1209 R/H ie. 1210 A & G intermittent. (Well into a cycle.). BV runoff channel wet/damp 1/2 way down. |
| 13542 |
04 Sep 2019 @ 1618 |
04 Sep 2019 @ 1629 |
Polly |
On arrival, BV channel wet 1/2 way down. High had thick bursts to 2’ & Gold thick bursts to 1’. Angle appeared at 1619 (but may have started before I got there). At 1620 H & G dropped, and MV had copious steam. 1625 MV roar, 1624 audible steam Upper Mortar. 1627 H & G thick again briefly but not as tall. |
| 13551 |
04 Sep 2019 @ 1115 |
04 Sep 2019 @ 1218 |
c.barwin |
Arrived to see a healthy jet of water coming from River, a fairly tall High Vent ie and a tallish nicely pooling Gold Vent ie, and Angle Vent was also playing. All vents waned at 1124 and finally fully turned off at 1206, except AV. During this time of quiet, MV and Mortar steamed, but not with force. All the vents turned on at 1215. Angle never fully stopped blipping. The fish are still jumping. The picnic table is still in place. Maybe next year. |
| 13535 |
04 Sep 2019 @ 0730 |
04 Sep 2019 @ 0810 |
Graham |
River Gold and Angle on all this time. nothing special, just a long time with them all on and still on as i leave |
| 11810 |
15 Jun 2019 @ 1240 |
15 Jun 2019 @ 1250 |
Polly |
1240 R & A ie. 1244 R off, A continues. BV a few very light drops & mild MV steam. 1248 R/H, 1249 G & A. Very quick cycle. (My experience with spring mode is long organized cycles.) There is a very small “pool” of water immediately to the left of BV. River a bit high & somewhat muddy. |
| 11536 |
03 Jun 2019 @ 0630 |
--- |
Kyle |
still no indication that it is ready to wake up. River seems low enough but poor water levels and "garbage" cycles dominate minor activity as it has over the last 2 weeks of occasional observation |
| 11030 |
20 Apr 2019 @ 0930 |
20 Apr 2019 @ 1945 |
RMichaels |
Yesterday, Fan and Mortar were having short, organized cycles (and at least one event cycle with significant Main Vent splashing, which is more promising than what I usually see this time of year). Today I observed Fan and Mortar from 0930-1945. Though I left for a couple periods, I believe I only missed two cycles. Cycles today were longer and less organized than what I saw yesterday. I only saw one "event" all day: it started at 1238 and it consisted of Main Vent splashing prior to a cycle start followed by one small MV splash after River came on. Otherwise the cycle was unremarkable (no pauses, little activity from Mortar, mediocre water levels). After that, the cycles were all long (River on for 1 hour or more) and boring except for the last. The last cycle was a regular cycle, though Main Vent steamed heavily prior to River starting and Bottom Vent and Lower Mortar had higher water levels than prior cycles. River and Gold came on almost simultaneously at 1907 and had much better water levels than what I'd seen previous. High and Gold had periods of jetting up to 4-6 feet that lasted for up to a minute. Water levels waned prior to Angle on at 1923, but the sudden increase in energy was still a positive. It will be interesting to see if Fan and Mortar continues its usual spring slumber or if it's working back toward having eruptions. |
| 10874 |
20 Jan 2019 @ 1435 |
--- |
Graham |
no ice at the splashpoint. likely dormant. |
| 10794 |
25 Dec 2018 @ 1600 |
--- |
Janet Jones |
Snow on things - no recent eruption- photo will be on my Instagram account (YellowstoneNaturalist) |
| 10716 |
04 Nov 2018 @ 0840 |
--- |
steve |
No overnight eruption |
| 10707 |
03 Nov 2018 @ 1115 |
--- |
steve |
No eruption overnight |
| 10704 |
02 Nov 2018 @ 1143 |
--- |
steve |
It appears F&M did not erupt overnight. No ice or other signs. |
| 10699 |
01 Nov 2018 @ 1250 |
--- |
steve |
At F&M I just watched three quick junk cycles. River, then High and Gold after a few minutes, then all off after a few minutes, then maybe five minutes off before it all repeats. |
| 10619 |
18 Oct 2018 @ 1340 |
18 Oct 2018 @ 1344 |
MikeG |
Steam visible on webcam. Too much wind to know if it's really coming from F&M. |
| 10606 |
13 Oct 2018 @ 1400 |
--- |
Tara |
No eruption overnight. |
| 10599 |
12 Oct 2018 @ 0920 |
--- |
Suzanne |
No eruption overnight. |
| 10586 |
07 Oct 2018 @ 1830 |
--- |
William |
Unattended. No eruption as of 18:30 |
| 10572 |
06 Oct 2018 @ 0950 |
--- |
Tara |
No eruption overnight. |
| 10570 |
05 Oct 2018 @ 1925 |
--- |
William |
Unattended. Had not erupted when I left at 19:25. |
| 10565 |
05 Oct 2018 @ 1020 |
--- |
Tara |
No eruption overnight. |
| 10505 |
30 Sep 2018 @ 1730 |
--- |
ThomasR |
Bridge and boardwalk wet. All vents quiet. |
| 10476 |
27 Sep 2018 @ 0500 |
--- |
Graham |
No eruption yet. |
| 10475 |
26 Sep 2018 @ 1950 |
--- |
William |
Had not erupted when I left at 19:50. |
| 10468 |
26 Sep 2018 @ 1844 |
--- |
Brian |
Unattended |
| 10465 |
26 Sep 2018 @ 1534 |
--- |
Polly |
Unattended |
| 10454 |
26 Sep 2018 @ 0600 |
--- |
Graham |
No eruption yet. |
| 10451 |
25 Sep 2018 @ 1910 |
--- |
Brian |
Unattended |
| 10331 |
21 Sep 2018 @ 1818 |
--- |
Brian |
Unattended at 1818 |
| 10315 |
21 Sep 2018 @ 0645 |
--- |
Graham |
Has not erupted yet. |
| 10173 |
13 Sep 2018 @ 0705 |
--- |
Kyle |
no eruption overnight. now at 18 days |
| 10160 |
12 Sep 2018 @ 0645 |
--- |
Kyle |
did not erupt overnight |
| 10139 |
11 Sep 2018 @ 0630 |
--- |
Kyle |
did not erupt overnight |
| 10127 |
10 Sep 2018 @ 0632 |
--- |
Kyle |
has not erupted. now at 14d 23h. |
| 10118 |
09 Sep 2018 @ 0759 |
--- |
EmilyW |
No overnight eruption |
| 10095 |
08 Sep 2018 @ 0715 |
--- |
Kyle |
no eruption overnight. 13 days so far |
| 10080 |
07 Sep 2018 @ 0445 |
--- |
Kyle |
no overnight eruption |
| 10054 |
06 Sep 2018 @ 0532 |
--- |
Kyle |
no eruption overnight |
| 10051 |
05 Sep 2018 @ 2125 |
--- |
Tara |
Unattended. |
| 10040 |
05 Sep 2018 @ 0455 |
--- |
Kyle |
has not erupted. at later stage if cycle. back vents steaming. poor water levels. |
| 10039 |
04 Sep 2018 @ 2220 |
--- |
Kyle |
no eruption yet. at the later stage of a cycle. poor water levels |
| 10036 |
04 Sep 2018 @ 1955 |
--- |
RMichaels |
Unattended. |
| 10019 |
04 Sep 2018 @ 0508 |
--- |
SteveO |
No F&M yet. |
| 10015 |
03 Sep 2018 @ 1945 |
--- |
RMichaels |
Unattended. No Event Cycles observed during daylight hours. |
| 9995 |
03 Sep 2018 @ 0613 |
--- |
RMichaels |
No eruption yet. |
| 9993 |
02 Sep 2018 @ 2303 |
--- |
Kyle |
has not erupted. late stage of a cycle. back vents steaming no water left in high or gold |
| 9983 |
02 Sep 2018 @ 0635 |
--- |
Kyle |
no eruption over night |
| 9980 |
01 Sep 2018 @ 1837 |
--- |
Pat Snyder |
unattended |
| 9973 |
01 Sep 2018 @ 0450 |
--- |
Kyle |
did not erupt overnight |
| 9958 |
31 Aug 2018 @ 0530 |
--- |
SteveO |
No F&M yet. |
| 9941 |
30 Aug 2018 @ 0727 |
--- |
EmilyW |
No overnight eruption |
| 9931 |
29 Aug 2018 @ 1910 |
--- |
c.barwin |
Unattended. |
| 9820 |
22 Aug 2018 @ 1251 |
--- |
c.barwin |
unattended as of 1251.. angle on at 1250 |
| 9738 |
16 Aug 2018 @ 2120 |
--- |
Tara |
No eruption yet. |
| 9731 |
16 Aug 2018 @ 0945 |
--- |
Tara |
No eruption yet. |
| 9729 |
15 Aug 2018 @ 2033 |
--- |
Tara |
Unattended. |
| 9723 |
15 Aug 2018 @ 0824 |
--- |
c.barwin |
no overnight eruption |
| 9708 |
14 Aug 2018 @ 0820 |
--- |
c.barwin |
no overnight eruption |
| 9696 |
13 Aug 2018 @ 0646 |
--- |
JimS |
No eruption overnight. |
| 9655 |
12 Aug 2018 @ 0610 |
--- |
JimS |
No eruption overnight. |
| 9647 |
11 Aug 2018 @ 2125 |
--- |
Tara |
Unattended. |
| 9640 |
11 Aug 2018 @ 0818 |
11 Aug 2018 @ 1502 |
c.barwin |
No morning or early-mid afternoon events. The last two cycles were long and MV emitted "half hearted" steam while RV sputtered along like it could pause. The first long cycle was 1130 RV on to 1256 RV on followed by 1256 RV on to 1445 RV on. |
| 9620 |
11 Aug 2018 @ 0633 |
--- |
JimS |
No eruption overnight. |
| 9606 |
10 Aug 2018 @ 2040 |
--- |
Tara |
Unattended. |
| 9404 |
02 Aug 2018 @ 1314 |
--- |
hkoenig |
Fan minor.
Hard to say when exactly started. Looked like extended “lock”. D>12m35s. Define end.
Looked like photos and descriptions of 19th century activity. |
| 9325 |
30 Jul 2018 @ 0650 |
--- |
hkoenig |
No eruption overnight. |
| 9256 |
21 Jul 2018 @ 0244 |
--- |
hkoenig |
No eruption. |
| 9247 |
20 Jul 2018 @ 0454 |
--- |
C Daubert |
no eruption overnight |
| 9244 |
19 Jul 2018 @ 2100 |
--- |
Tara |
Unattended |
| 9243 |
19 Jul 2018 @ 0642 |
--- |
hkoenig |
Nothing overnight, marker in place. |
| 9240 |
18 Jul 2018 @ 1545 |
--- |
Tara |
Unattended |
| 9239 |
18 Jul 2018 @ 0850 |
--- |
Tara |
No eruption yet. Came up on what was probably the tail end of an event cycle. Water levels were poor but Bottom Vent's runoff was damp, Back Vents were on, and there was a single angled splash in Main Vent. |
| 9166 |
13 Jul 2018 @ 0524 |
--- |
C Daubert |
boardwalk is wet, probable overnight eruption |
| 9049 |
06 Jul 2018 @ 2200 |
--- |
Tara |
Unattended. |
| 8511 |
06 Jun 2018 @ 1230 |
--- |
Polly |
Stream by the outhouse is dry. Firehole River water levels are comparable to what they were last year at the time when F&M came out of dormancy (still on the high side but down considerably from peak). |
| 8261 |
15 May 2018 @ 1452 |
15 May 2018 @ 1552 |
Polly |
River, High, Gold (with Gold 2 & 3) ie on approach. Very small amount of water in Bottom Vent channel about 1’ down. Angle 1507. At about 1541, Bottom Vent had a sound like breaker waves hitting a rock (bassy sound). By 1543 sounded like Bottom Vent or Lower Mortar was filling - water flowing inside. River was trying to shut off as we left. |
| 8147 |
10 May 2018 @ 1915 |
--- |
Tara |
Stream next to pit toilet still flowing nicely. F&M in weak garbage. |
| 8088 |
06 May 2018 @ 1436 |
--- |
Micah Kipple |
Garbage |
| 8090 |
04 May 2018 @ 1605 |
--- |
Tara |
Weak garbage mode. Creek next to pit toilet flowing nicely. |
| 7865 |
31 Dec 2017 @ 0459 |
--- |
Betty |
nice mushroom cloud in the right place |
| 7812 |
03 Nov 2017 @ 1437 |
--- |
steve |
No eruption overnight. |
| 7811 |
02 Nov 2017 @ 1245 |
--- |
steve |
No eruption overnight |
| 7801 |
31 Oct 2017 @ 1214 |
--- |
steve |
From the signs at Fan & Mortar It does appear it erupted last night |
| 7795 |
29 Oct 2017 @ 1349 |
--- |
billwarnock |
Big steam cloud in Fan and Mortar area. Louise checked later and said it hadn't erupted. Steam billowing until 1406. I don't think it was Artemisia. |
| 7711 |
15 Oct 2017 @ 1330 |
--- |
WillBoekel |
Area washed and fan and mortar dead in recovery mode. |
| 7685 |
03 Oct 2017 @ 0944 |
--- |
Kitt B |
end time for Fan & Mortar |
| 6919 |
22 Sep 2017 @ 1030 |
--- |
Csiegel |
Lots of gurgling. Main, river, gold, angle all on sustaining about 2ft bursts then nothing. |
| 6856 |
20 Sep 2017 @ 0823 |
--- |
JimS |
No eruption yet. |
| 6854 |
19 Sep 2017 @ 1645 |
--- |
Csiegel |
Nuthin... Lots of churning. Gold on. River on. |
| 6851 |
19 Sep 2017 @ 1250 |
--- |
Polly |
No F & M yet. |
| 6808 |
18 Sep 2017 @ 1600 |
--- |
Polly |
Unattended |
| 6804 |
18 Sep 2017 @ 1240 |
--- |
Polly |
Unattended. |
| 6751 |
18 Sep 2017 @ 0740 |
--- |
JimS |
No eruption yet. |
| 6664 |
17 Sep 2017 @ 1730 |
--- |
Polly |
Unattended |
| 6627 |
17 Sep 2017 @ 0659 |
--- |
JimS |
No eruption yet. |
| 6613 |
16 Sep 2017 @ 1925 |
--- |
Tara |
Unattended. |
| 6435 |
16 Sep 2017 @ 0454 |
--- |
Graham |
No eruption overnight |
| 6433 |
15 Sep 2017 @ 2002 |
--- |
RLJones |
No eruption yet. F&M unattended. |
| 6373 |
14 Sep 2017 @ 2009 |
--- |
RLJones |
No eruption yet. F&M now unattended. |
