Last Known Eruption
2d 3h 2m ago

Latest Eruptions

Eruption DurationInterval
11 May 2025 @ 1957 min5m
11 May 2025 @ 1952 min6m
11 May 2025 @ 1946 min3m
11 May 2025 @ 1943 min6m
11 May 2025 @ 1937 min7m
11 May 2025 @ 1930 min9m
11 May 2025 @ 1921 min10m
11 May 2025 @ 1911 min7m
11 May 2025 @ 1904 min8m
11 May 2025 @ 1856 min5m
11 May 2025 @ 1851 min13m
11 May 2025 @ 1838 maj11m
11 May 2025 @ 1827 min6m
11 May 2025 @ 1821 min9m
11 May 2025 @ 1812 min13m
11 May 2025 @ 1759 min3m
11 May 2025 @ 1756 min14m
11 May 2025 @ 1742 min18m
11 May 2025 @ 1724 maj18m
11 May 2025 @ 1706 ns maj13m
11 May 2025 @ 1653 maj14m
11 May 2025 @ 1639 maj17m
11 May 2025 @ 1622 maj1h 9m
11 May 2025 @ 1513 maj27m
11 May 2025 @ 1446 maj27m
11 May 2025 @ 1419 maj13m
11 May 2025 @ 1406 maj5m
11 May 2025 @ 1401 ie min17m
11 May 2025 @ 1344 ie maj14m
11 May 2025 @ 1330 ns min1d 17h 8m
09 May 2025 @ 20226m 2d 3h 52m
07 May 2025 @ 1630 maj44m
07 May 2025 @ 1546 ie18m
07 May 2025 @ 1528 ie2d 8h 0m
05 May 2025 @ 0728 ie maj1h 25m
05 May 2025 @ 060311h 25m
04 May 2025 @ 1838 ie wc8h 46m
04 May 2025 @ 0952 maj20h 39m
03 May 2025 @ 1313 wc2h 38m
03 May 2025 @ 1035 ie wc17h 37m
02 May 2025 @ 16581d 23h 16m
30 Apr 2025 @ 1742 maj6h 16m
30 Apr 2025 @ 1126 ns maj1h 54m
30 Apr 2025 @ 0932 ie wc21h 11m
29 Apr 2025 @ 1221 ns maj16h 38m
28 Apr 2025 @ 1943 ie min9h 37m
28 Apr 2025 @ 1006 maj1d 21h 29m
26 Apr 2025 @ 1237 ie wc2d 17h 59m
23 Apr 2025 @ 1838 maj27m
23 Apr 2025 @ 1811 min10m
23 Apr 2025 @ 1801 min14m
23 Apr 2025 @ 1747 min15m
23 Apr 2025 @ 1732 ie min1d 3h 6m
22 Apr 2025 @ 1426 maj6m 33m
22 Apr 2025 @ 1353 min18h 31m
21 Apr 2025 @ 1922 ie wc6h 10m
21 Apr 2025 @ 1312 ns wc3h 9m
21 Apr 2025 @ 1003 ie wc3d 7m
18 Apr 2025 @ 09566m 1d 19h 49m
16 Apr 2025 @ 1407 ie wc2h 37m
16 Apr 2025 @ 1130 wc1d 21h 44m
14 Apr 2025 @ 1346 ns wc1d 2h 55m
13 Apr 2025 @ 1051 wc2d 18h 34m
10 Apr 2025 @ 1617 ie wc20h 44m
09 Apr 2025 @ 1933 ie wc9d 1h 16m
31 Mar 2025 @ 1817 ie wc4d 8h 11m
27 Mar 2025 @ 1006 ie wc2h 4m
27 Mar 2025 @ 0802 ie wc1d 22h 54m
25 Mar 2025 @ 0908 ie wc21h 31m
24 Mar 2025 @ 1137 wc maj8d 20h 35m
15 Mar 2025 @ 1502 ns wc19h 40m
14 Mar 2025 @ 1922 ie wc3d 34m
11 Mar 2025 @ 1848 ie wc2h 39m
11 Mar 2025 @ 1609 ie wc3h 7m
11 Mar 2025 @ 1302 ie wc maj4h 28m
11 Mar 2025 @ 0834 ns wc maj5d 23h 4m
05 Mar 2025 @ 0830 ie wc3d 22h 35m
01 Mar 2025 @ 0955 min4d 1h 35m
25 Feb 2025 @ 0820 ie wc17m
25 Feb 2025 @ 0803 wc14h 53m
24 Feb 2025 @ 1710 ns38m
24 Feb 2025 @ 1632 ie wc6m
24 Feb 2025 @ 162617d 9h 3m
07 Feb 2025 @ 0723 ie wc11d 17h 23m
26 Jan 2025 @ 1400 ie wc22h 9m
25 Jan 2025 @ 1551 ns wc4d 23h 46m
20 Jan 2025 @ 1605 ie wc6d 1h 56m
14 Jan 2025 @ 1409 wc maj4m 1d 1h 23m
13 Jan 2025 @ 1246 maj1h 11m
13 Jan 2025 @ 1135 ns maj16m
13 Jan 2025 @ 1119 ie min3d 34m
10 Jan 2025 @ 1045 maj25m
10 Jan 2025 @ 1020 maj5m 14m
10 Jan 2025 @ 1006 min14m
10 Jan 2025 @ 0952 min13m
10 Jan 2025 @ 0939 min11m
10 Jan 2025 @ 0928 min38m
10 Jan 2025 @ 0850 maj32m
10 Jan 2025 @ 0818 ns maj22h 17m
09 Jan 2025 @ 1001 maj6m 2d 1h 41m

Interval Statistics

Interval Count100
Min3m
Max17d 9h 3m
Mean1d 5h 51m
Median1h 59m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
36201 01 Aug 2024 @ 0837 --- mhreed Low pool splashing
35326 19 Jun 2024 @ 0926 --- Forestbewithyou Failed eruption
35325 19 Jun 2024 @ 0922 --- Forestbewithyou I forgot to note down the exact time that it had a fail but it was around this time.
35324 19 Jun 2024 @ 0915 --- Forestbewithyou Attempted an eruption but was not successful
35275 17 Jun 2024 @ 0827 --- Forestbewithyou Attempted to erupt. Had several decent splashes but never filled its vent with water
35234 15 Jun 2024 @ 1613 --- Joe   finished
34905 05 Jun 2024 @ 1036 --- SantaFe108 Low splashing within vent.
26613 23 Jun 2023 @ 0951 --- Forestbewithyou Failed eruption. Filled splashed a bit then drained after 20sec
24816 01 Jan 2023 @ 1345 --- mhreed Low pool bursting. Fun noises that would be easier to hear if Slurp used its inside voice.
21307 16 May 2022 @ 1032 --- Brando gurgling deep within
21151 02 May 2022 @ 0948 --- aferrara Weak splashing, rarely higher than vent rim
20628 23 Dec 2021 @ 1303 --- mhvogel Old Tardy stopped a few seconds after adding eruption.
18397 12 Jul 2021 @ 1914 12 Jul 2021 @ 1917 JarnoO (wc) Steamy 1914:17 - 1914:35. 1916:53 - 1917:16 erupted water to very low height.
17889 18 Jun 2021 @ 1743 --- Craigmon99 Someone has thrown a chunk of boardwalk in Old Tardy C. Rangers said they will deal with it tomorrow as there are too many bison.
17531 07 Jun 2021 @ 0740 07 Jun 2021 @ 1640 Graham No eruption seen during this period. I was watching from Tilts Baby so may have missed one.
13998 02 Nov 2019 @ 1657 --- steve Euupting deep in the vent with occasional droplets making it to the surface.
13116 08 Aug 2019 @ 1317 08 Aug 2019 @ 1703 JSJ Closed intervals.
13113 08 Aug 2019 @ 1317 08 Aug 2019 @ 1329 JSJ Inclinometer reading: highest water about 20 vertical feet (but highest spouts were angled).
13102 07 Aug 2019 @ 1252 07 Aug 2019 @ 1614 JSJ Closed intervals (1252 eruption to 1438A eruption to 1614 eruption).
11580 04 Jun 2019 @ 1141 04 Jun 2019 @ 1808 JSJ All posted Old Tardy eruptions are closed intervals.
5779 04 Sep 2017 @ 1628 --- Janet Jones Heard a gurgle at depth. Crystal Spring had overflowed enough to flow into it and might have been part of that gurgle.
3202 22 Jun 2016 @ 1503 --- ghost63 Water seen draining in to crater, and water in drainage from 14:59 eruption. See photo: https://www.flickr.com/photos/ujelang/27979999542/in/photolist-JCuP4d-HRiX6u-hhGHcZ
2148 14 Aug 2015 @ 1215 --- JSJ Old Tardy Geyser & Old Tardy C Geyser were both spitting at 1215.
1591 15 May 2015 @ 1051 15 May 2015 @ 1652 JSJ No eruptions from 1051 to 1652.
749 23 Jan 2013 @ 0000 23 Jan 2013 @ 2359 Graham Note that GeyserTimes has associated multiple eruption times incorectly, they were all different eruptons.
12711 06 Aug 1994 @ 0000 06 Aug 1994 @ 2359 JarnoO a string of times and durations entered; too faint to read in Xerox copy
440 17 Jul 1975 @ 1930 --- BoekelUpload between 1930-2015
EntrySourceLinkComment
06 Aug 2020 @ 1735 JSJ https://www.youtube.com/watch?v=XaQC2lQxZNg#t=3m28s Clips 7-9 of this video compilation (= time stamp 3:28 to the end) show Old Tardy Geyser's 5:35 to 5:42 PM eruption on 6 August 2020.
04 Aug 2020 @ 1709 JSJ https://www.youtube.com/watch?v=XaQC2lQxZNg Clips 1-6 of this video compilation (= beginning to time stamp 3:27) show Old Tardy Geyser's 5:09 to 5:20 PM eruption on 4 August 2020.
04 Aug 2020 @ 1709 JSJ https://www.flickr.com/photos/jsjgeology/50200898197 Photo (out of 8) of Old Tardy Geyser's 5:09 to 5:20 PM eruption on 4 August 2020.
04 Jun 2019 @ 1436 JSJ https://www.youtube.com/watch?v=GUelIDygZKQ#t=1m27s Clips 6-12 of this video compilation (= time stamp 1:27 to the end) show Old Tardy Geyser's 2:36 to 2:45 PM eruption on 4 June 2019.
04 Jun 2019 @ 1331 JSJ https://www.youtube.com/watch?v=GUelIDygZKQ Clips 1-5 of this video compilation (= beginning to time stamp 1:26) show Old Tardy Geyser's 1:31 to 1:37 PM eruption on 4 June 2019.
01 Jun 2013 @ 1155 JSJ https://www.flickr.com/photos/jsjgeology/13787235753 Photo (1 of 7) of Old Tardy Geyser's 11:55 to 11:56 AM eruption on 1 June 2013.
02 Jun 2013 @ 1111 JSJ https://www.flickr.com/photos/jsjgeology/13787183985 Video clip of Old Tardy Geyser's 11:11 to 11:14 AM on 2 June 2013.
02 Jun 2013 @ 1111 JSJ https://www.flickr.com/photos/jsjgeology/13787186185 Photo (1 of many, plus video clips) of Old Tardy Geyser's 11:11 to 11:14 AM eruption on 2 June 2013.
09 Jul 2011 @ 1759 kcmule http://tinyurl.com/3o4j3vt
26 Jun 2011 @ 2012 kcmule http://tinyurl.com/63xxg53
Baseline does not exist.