Last Known Eruption
2d 20h 47m ago

Latest Eruptions

Eruption DurationInterval
26 Jun 2025 @ 1650 wc6d 9h 51m
20 Jun 2025 @ 0659 wc15h 49m
19 Jun 2025 @ 1510 ie wc1h 53m
19 Jun 2025 @ 1317 ns43m
19 Jun 2025 @ 123440m
19 Jun 2025 @ 115431m
19 Jun 2025 @ 11233d 15h 8m
15 Jun 2025 @ 201531m
15 Jun 2025 @ 1944 ns2h 56m
15 Jun 2025 @ 1648 ns3m
15 Jun 2025 @ 164510m
15 Jun 2025 @ 163510m
15 Jun 2025 @ 16259m
15 Jun 2025 @ 16167m
15 Jun 2025 @ 16096m
15 Jun 2025 @ 16033m
15 Jun 2025 @ 16003m
15 Jun 2025 @ 15579m
15 Jun 2025 @ 15488m
15 Jun 2025 @ 15406m
15 Jun 2025 @ 153411m
15 Jun 2025 @ 152313m
15 Jun 2025 @ 1510 ns12m
15 Jun 2025 @ 145812m
15 Jun 2025 @ 1446 ns14m
15 Jun 2025 @ 1432 ns19m
15 Jun 2025 @ 14134m 10m
15 Jun 2025 @ 140310m
15 Jun 2025 @ 1353 ie9m
15 Jun 2025 @ 1344 ns4h 32m
15 Jun 2025 @ 091243s 2d 14h 19m
12 Jun 2025 @ 1853 wc1h 7m
12 Jun 2025 @ 1746 ie wc1d 10h 36m
11 Jun 2025 @ 0710 ie wc23h 34m
10 Jun 2025 @ 0736 ie wc1h 24m
10 Jun 2025 @ 0612 wc16h 6m
09 Jun 2025 @ 1406 wc3d 7h 34m
06 Jun 2025 @ 0632 ie wc21h 16m
05 Jun 2025 @ 0916 ie1h 14m
05 Jun 2025 @ 08026m 3d 17h 33m
01 Jun 2025 @ 14297h 17m
01 Jun 2025 @ 071211h 17m
31 May 2025 @ 1955 ie1d 4h 26m
30 May 2025 @ 1529 ie1h 52m
30 May 2025 @ 1337 ie wc2h 12m
30 May 2025 @ 11253m 44m
30 May 2025 @ 1041 ie wc16h 55m
29 May 2025 @ 1746 ie wc1h 44m
29 May 2025 @ 1602 ie8h 27m
29 May 2025 @ 0735 ie1h 19m
29 May 2025 @ 06161d 15h 59m
27 May 2025 @ 1417 ie2d 6h 40m
25 May 2025 @ 07372d 14h 18m
22 May 2025 @ 17197m
22 May 2025 @ 17128m
22 May 2025 @ 170414m
22 May 2025 @ 165013m
22 May 2025 @ 163739m
22 May 2025 @ 15583h 58m
22 May 2025 @ 12004d 21h 24m
17 May 2025 @ 1436 maj~5m 48m
17 May 2025 @ 13485m 54m
17 May 2025 @ 12541h 4m
17 May 2025 @ 115033m
17 May 2025 @ 11172d 14h 5m
14 May 2025 @ 21121h 3m
14 May 2025 @ 2009 ie maj3d 12m
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

Interval Statistics

Interval Count100
Min3m
Max6d 9h 51m
Mean12h 0m
Median18m

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.