Last Known Eruption
47m ago
Predicted Next Eruption
Today at 0559 ± 25 minutes

Latest Eruptions

Eruption DurationInterval
17 May 2024 @ 2359 wc12h 30m
17 May 2024 @ 1129 wc6h 20m
17 May 2024 @ 0509 wc12h 6m
16 May 2024 @ 17036h 17m
16 May 2024 @ 1046 ns wc5h 52m
16 May 2024 @ 0454 wc4h 58m
15 May 2024 @ 2356 wc5h 14m
15 May 2024 @ 1842 ie wc6h 33m
15 May 2024 @ 1209 ns19h 10m
14 May 2024 @ 1659 wc6h 12m
14 May 2024 @ 1047 ns wc6h 4m
14 May 2024 @ 0443 wc6h 1m
13 May 2024 @ 2242 wc6h 18m
13 May 2024 @ 1624 ie wc1d 5h 55m
12 May 2024 @ 1029 ie wc1d 1m
11 May 2024 @ 10285h 16m
11 May 2024 @ 0512 wc6h 0m
10 May 2024 @ 2312 ie wc5h 51m
10 May 2024 @ 1721 ns5h 54m
10 May 2024 @ 1127 ie18h 57m
09 May 2024 @ 1630 wc6h 33m
09 May 2024 @ 0957 wc13h 4m
08 May 2024 @ 2053 wc6h 6m
08 May 2024 @ 1447 wc6h 45m
08 May 2024 @ 0802 wc12h 44m
07 May 2024 @ 1918 ie wc13h 5m
07 May 2024 @ 0613 ns wc12h 49m
06 May 2024 @ 1724 ns wc6h 19m
06 May 2024 @ 1105 wc6h 0m
06 May 2024 @ 0505 wc12h 7m
05 May 2024 @ 1658 wc6h 8m
05 May 2024 @ 1050 ie17h 45m
04 May 2024 @ 17055h 57m
04 May 2024 @ 1108 ? ie wc6h 17m
04 May 2024 @ 0451 wc12h 37m
03 May 2024 @ 1614 ie6h 41m
03 May 2024 @ 0933 ns17h 54m
02 May 2024 @ 153917h 49m
01 May 2024 @ 2150 wc6h 24m
01 May 2024 @ 1526 wc6h 18m
01 May 2024 @ 0908 ie wc12h 34m
30 Apr 2024 @ 2034 wc5h 7m
30 Apr 2024 @ 1527 ie wc6h 13m
30 Apr 2024 @ 0914 wc12h 59m
29 Apr 2024 @ 2015 ns wc5h 45m
29 Apr 2024 @ 1430 A6h 41m
29 Apr 2024 @ 0749 ns wc12h 31m
28 Apr 2024 @ 191819m 46s 6h 19m
28 Apr 2024 @ 1259 ie wc6h 22m
28 Apr 2024 @ 0637 wc12h 12m
27 Apr 2024 @ 1825 ie wc6h 24m
27 Apr 2024 @ 12016h 4m
27 Apr 2024 @ 0557 ie wc19h 29m
26 Apr 2024 @ 1028 ns wc6h 22m
26 Apr 2024 @ 0406 wc18h 55m
25 Apr 2024 @ 0911 wc6h 18m
25 Apr 2024 @ 0253 wc6h 23m
24 Apr 2024 @ 2030 wc6h 14m
24 Apr 2024 @ 1416 A19m 1d 15m
23 Apr 2024 @ 1401 ns6h 25m
23 Apr 2024 @ 0736 wc6h 32m
23 Apr 2024 @ 0104 wc6h 42m
22 Apr 2024 @ 1822 ns wc6h 27m
22 Apr 2024 @ 1155206h 27m
22 Apr 2024 @ 0528 wc6h 23m
21 Apr 2024 @ 2305 wc12h 34m
21 Apr 2024 @ 103120m 6h 22m
21 Apr 2024 @ 0409 wc6h 32m
20 Apr 2024 @ 2137 wc6h 35m
20 Apr 2024 @ 150221m 6h 4m
20 Apr 2024 @ 0858 wc6h 24m
20 Apr 2024 @ 0234 wc6h 26m
19 Apr 2024 @ 2008 wc6h 20m
19 Apr 2024 @ 1348 wc5h 10m
19 Apr 2024 @ 0838 ie wc6h 38m
19 Apr 2024 @ 0200 wc6h 20m
18 Apr 2024 @ 1940 wc6h 20m
18 Apr 2024 @ 1320 wc6h 21m
18 Apr 2024 @ 0659 ie wc6h 35m
18 Apr 2024 @ 0024 ns wc6h 38m
17 Apr 2024 @ 1746 wc6h 35m
17 Apr 2024 @ 1111 ie wc19h 7m
16 Apr 2024 @ 1604 ie wc6h 16m
16 Apr 2024 @ 0948 ie wc12h 51m
15 Apr 2024 @ 2057 ie wc5h 20m
15 Apr 2024 @ 1537 ie wc6h 23m
15 Apr 2024 @ 0914~19m 11h 50m
14 Apr 2024 @ 2124 wc6h 4m
14 Apr 2024 @ 1520 ns6h 18m
14 Apr 2024 @ 0902 ie12h 5m
13 Apr 2024 @ 2057 wc5h 3m
13 Apr 2024 @ 1554 ie wc6h 31m
13 Apr 2024 @ 0923 ie wc12h 52m
12 Apr 2024 @ 2031 wc5h 52m
12 Apr 2024 @ 1439 ie wc5h 19m
12 Apr 2024 @ 0920 ns wc17h 3m
11 Apr 2024 @ 1617 wc6h 16m
11 Apr 2024 @ 1001 ie wc19h 2m
10 Apr 2024 @ 1459 wc6h 20m
10 Apr 2024 @ 0839 ns wc17h 35m

Interval Statistics

Interval Count100
Min4h 58m
Max1d 5h 55m
Mean9h 12m
Median6h 24m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
34565 15 May 2024 @ 1138 --- BrandonC In strong overflow
34499 10 May 2024 @ 1103 --- jkgood In overflow
34468 06 May 2024 @ 1724 --- Paul Wheeler Awesome
34309 22 Apr 2024 @ 1009 --- DanS In overflow
34196 15 Apr 2024 @ 1337 --- mhreed Overflow occurred within the last 15 minutes
34195 15 Apr 2024 @ 0855 --- mhreed In overflow, decent splashing in the pool
33891 20 Jan 2024 @ 0726 --- K.Cooper quiet
33788 14 Jan 2024 @ 1528 --- K.Cooper started overflow very recently
33786 14 Jan 2024 @ 1457 --- K.Cooper dry.
33025 18 Dec 2023 @ 1123 --- mhreed Empty. Erupted sometime before 1050.
33019 18 Dec 2023 @ 0918 --- mhvogel In overflow as I walked up.
32937 16 Dec 2023 @ 1015 --- aferrara Overflow, keyhole on
32847 15 Dec 2023 @ 0955 --- Pholli in overflow
29166 26 Oct 2023 @ 0942 --- nomadruss In overflow, not vigorous. I’d guess it will erupt around 10:30 so be watching for it.
29063 23 Oct 2023 @ 0951 23 Oct 2023 @ 0952 mhvogel Post eruptive. Heavy steam from both vents with no water.
28940 21 Oct 2023 @ 0750 --- User34 In overflow
28708 08 Oct 2023 @ 1523 --- Darcie In overflow
28526 28 Sep 2023 @ 0827 --- CraigC in overflow
28439 24 Sep 2023 @ 1025 --- CraigC started overflow within last 10 mins
28419 23 Sep 2023 @ 0830 --- CraigC started overflow within the last 10 mins
28361 20 Sep 2023 @ 1130 --- CraigC in overflow
28340 19 Sep 2023 @ 1015 --- MJL Overflow started 10:15.
28319 18 Sep 2023 @ 0850 --- Darcie Was not in overflow at 0845, but was at 0852
28221 11 Sep 2023 @ 1143 --- Darcie In overflow
28209 11 Sep 2023 @ 0915 --- Colin_W Quietly steaming. No overflow or splashing yet.
28193 10 Sep 2023 @ 1620 --- SantaFe108 In overflow.
28191 10 Sep 2023 @ 1546 --- Colin_W No overflow yet.
28115 08 Sep 2023 @ 1111 --- CP No steam phase.
28082 07 Sep 2023 @ 0938 --- CraigC overflow began
28050 06 Sep 2023 @ 0807 --- CraigC started overflow since check at 0800
27988 04 Sep 2023 @ 0655 --- SteveO In overflow.
27953 02 Sep 2023 @ 1630 --- SantaFe108 In overflow.
27865 30 Aug 2023 @ 1151 --- CraigC in overflow
27825 28 Aug 2023 @ 1059 --- CraigC in overflow already
27752 24 Aug 2023 @ 0936 --- RLJones Start of overflow
27718 22 Aug 2023 @ 0938 --- BrianR In overflow, was not in overflow half hour earlier per ranger
27708 21 Aug 2023 @ 0909 --- Colin_W Overflow with splashing in lower vent.
27487 10 Aug 2023 @ 0830 --- aferrara Dry, very weakly steaming
27379 02 Aug 2023 @ 0605 --- JimS Already in overflow
27349 30 Jul 2023 @ 2202 --- RMichaels Jetted water out of the top vent for a solid three minutes then quit without initiating the eruption. Afterward overflow completely stopped and Riverside fell silent. I've never seen Riverside behave this way before. Resumed overflow at 2225. Did not stay to see if this significantly delayed the eruption.
27130 20 Jul 2023 @ 0627 --- rbwhitaker in overflow
26704 28 Jun 2023 @ 0615 --- JimS Already in overflow
26691 27 Jun 2023 @ 0555 --- JimS Already in overflow
26392 17 Jun 2023 @ 0710 --- JimS Already in overflow
26332 15 Jun 2023 @ 0729 --- JimS Already in overflow
26255 12 Jun 2023 @ 0530 --- Darcie In overflow
26206 10 Jun 2023 @ 0631 --- JimS In overflow
26128 07 Jun 2023 @ 1547 --- SantaFe108 In overflow with good boiling.
26078 06 Jun 2023 @ 1000 --- Darcie Post-eruptive at 10:00, in overflow at 9:15
25999 04 Jun 2023 @ 0647 --- K.Cooper Large and 30s sustained 6ft surge from Upper vent. pool dropped.
25944 01 Jun 2023 @ 1220 --- ge 1st overflow
25942 01 Jun 2023 @ 0710 --- SteveO In overflow
25891 29 May 2023 @ 1420 29 May 2023 @ 1430 Tara Water burbling up in main vent. Occasional low whumping sounds from cone vent. Overflow resumed at 1429.
25890 29 May 2023 @ 1409 --- Tara Episode of huge splashes from upper/cone vent, height 5 to 15 feet above the cone and dumping water into the river. When this started the main/pool vent had strong overflow and was splashing to a foot, water level dropped pretty quickly and then all water disappeared. The epsidode lasted about 2 minutes, after which both vents were very quiet and showed no water.
25641 21 May 2023 @ 1002 --- Brando In overflow
25299 30 Apr 2023 @ 1645 --- SantaFe108 In overflow.
25215 23 Apr 2023 @ 0910 23 Apr 2023 @ 0925 aferrara Overflowing, but no keyhole vent yet
25073 05 Mar 2023 @ 1442 --- Colin_W No overflow
25070 04 Mar 2023 @ 1002 --- Colin_W In overflow with splashing
25040 27 Feb 2023 @ 1007 --- Colin_W Overflow and splashing
25025 20 Feb 2023 @ 1010 --- Colin_W In overflow with splashing.
24977 05 Feb 2023 @ 1054 --- Colin_W No splashing or overflow. Light steam from upper vent. Erupted earlier in the window.
24956 28 Jan 2023 @ 1546 --- Colin_W Steamy, no overflow. Post-eruption.
24437 18 Oct 2022 @ 1516 --- mwolf overflowing
24418 16 Oct 2022 @ 1240 --- User34 Trickling overflow, barely boiling from main vent
24365 14 Oct 2022 @ 1654 --- mwolf in overflow
23886 18 Sep 2022 @ 0729 --- RLJones riverside is in overflow. start time of overflow unknown
23876 17 Sep 2022 @ 1047 --- RLJones start of overflow
23851 16 Sep 2022 @ 0930 --- RLJones first overflow
23704 10 Sep 2022 @ 1150 --- BobInSLC in overflow
23409 26 Aug 2022 @ 0635 --- JimS Quiet.
23027 04 Aug 2022 @ 0940 --- dandersen In overflow
22847 26 Jul 2022 @ 0856 --- mhvogel In overflow
22691 19 Jul 2022 @ 1045 --- JimS Start of overflow at 1045.
22296 03 Jul 2022 @ 0746 --- JimS Already in overflow at this time.
22280 02 Jul 2022 @ 0708 --- EmilyW In overflow at this time
22253 01 Jul 2022 @ 0607 --- JimS Already in overflow at 0608
22189 29 Jun 2022 @ 0526 --- JimS Post eruptive at this time.
21873 09 Jun 2022 @ 1518 --- Forestbewithyou In overflow
21857 09 Jun 2022 @ 0825 --- RLJones In overflow at 0825, was not in overflow at 0740
21737 05 Jun 2022 @ 0820 --- Graham Gentle steam, post eruptive. 07xx report was Riverside, not F&M. Riverside had a very short interval, which it can do.
21679 03 Jun 2022 @ 0609 --- JimS Already in overflow.
21655 02 Jun 2022 @ 1018 --- JimS Start of overflow.
21630 01 Jun 2022 @ 0850 --- JimS Start of overflow.
21593 31 May 2022 @ 0700 --- JimS Overflow started at 0700.
21573 29 May 2022 @ 1411 --- aferrara Keyhole flipped off, off for about a minute
21472 25 May 2022 @ 0942 --- Colin_W Splashing in main vent and draining off to the side.
21337 17 May 2022 @ 1006 --- aferrara After >20 minutes of activity, keyhole turned off
21283 15 May 2022 @ 1326 --- aferrara First overflow
21282 15 May 2022 @ 1323 --- aferrara No overflow, no keyhole. Water just visible and boiling
21208 07 May 2022 @ 0939 --- Colin_W No pool or slashing. Steam gently wafting from both vents.
21162 04 May 2022 @ 0932 --- Colin_W Splashing in main vent and overflow.
21131 30 Apr 2022 @ 0936 --- Colin_W Splashing and overflow around the main cone.
20881 11 Mar 2022 @ 0925 --- aferrara Empty, lightly steam from both vents
20782 04 Feb 2022 @ 0924 --- aferrara keyhole on
20766 30 Jan 2022 @ 0941 --- aferrara Keyhole start
20704 16 Jan 2022 @ 0915 16 Jan 2022 @ 0940 aferrara Keyhole on, nothing from upper vent in this time.
20319 06 Nov 2021 @ 0859 --- aferrara In overflow
20235 31 Oct 2021 @ 0916 --- cb in overflow
20217 30 Oct 2021 @ 0952 --- Brando In overflow with boiling. Ranger prediction 10:30-10:45
EntrySourceLinkComment
22 Jul 2020 @ 1328 JSJ https://www.youtube.com/watch?v=DD6WNhycERw 4 minute video of eruption.
17 Jul 2020 @ 0826 JSJ https://www.youtube.com/watch?v=4nQk8faybk8 Video of Riverside Geyser's morning eruption on 17 July 2020.
24 Oct 2019 @ 0825 JoeN https://youtu.be/9zd4Sn1BbIE r-side video
24 Oct 2019 @ 0825 JoeN https://i.imgur.com/yAycpXd.png picture
17 Sep 2019 @ 0807 JoeN https://i.imgur.com/qav7bhe.png one shot pic
06 Jun 2018 @ 1346 JSJ https://www.flickr.com/photos/jsjgeology/28208979037 Photo (out of 3) of Riverside Geyser's afternoon eruption on 6 June 2018.
08 Aug 2017 @ 1845 JSJ https://www.flickr.com/photos/jsjgeology/35725848423 Photo (out of 6) of Riverside Geyser's 6:45 PM-onward eruption on 8 August 2017.
02 Jul 2016 @ 1244 JSJ https://www.youtube.com/watch?v=QiSiw1FbPF0 Video compilation of Riverside Geyser's 12:44 PM-onward eruption on 2 July 2016.
03 Jul 2016 @ 1540 JSJ https://www.flickr.com/photos/jsjgeology/28303442506 Photo (1 of 6) of Riverside Geyser's 3:40 PM-onward eruption on 3 July 2016.
02 Jul 2016 @ 1244 JSJ https://www.flickr.com/photos/jsjgeology/27721214383 Photo (1 of 2) of Riverside Geyser's 12:44 PM-onward eruption on 2 July 2016.
08 Jul 2014 @ 1600 JSJ https://www.flickr.com/photos/jsjgeology/15129110278 Photo (1 of 3) of Riverside Geyser erupting at 4:00 PM-onward on 8 July 2014.
04 Aug 2013 @ 1653 JSJ https://www.flickr.com/photos/jsjgeology/13923848943 Photo (first of many) of Riverside Geyser's 4:54 to 5:16 PM eruption on 4 August 2013.
31 May 2013 @ 1528 JSJ https://www.flickr.com/photos/jsjgeology/13923982114 Photo (first of many, plus videos) of Riverside Geyser's 3:28 to 3:49 PM eruption on 31 May 2013.
28 Sep 2015 @ 0428 td http://i57.tinypic.com/1426f41.jpg Riverside?
27 Apr 2015 @ 0709 td http://tinypic.com/m/inx2eh/3 Taken 4/27/15 at 07:14 MT
01 Jul 2009 @ 1145 Micah Kipple https://www.flickr.com/photos/fback2008/16380373861 Flickr
Baseline does not exist.