Last Known Eruption
10h 23m ago

Latest Eruptions

Eruption DurationInterval
25 Jun 2024 @ 1825 ns6h 33m
25 Jun 2024 @ 1152~19m 6h 23m
25 Jun 2024 @ 0529 wc12h 31m
24 Jun 2024 @ 16586h 33m
24 Jun 2024 @ 102512h 57m
23 Jun 2024 @ 2128 ie6h 28m
23 Jun 2024 @ 15006h 29m
23 Jun 2024 @ 083113h 4m
22 Jun 2024 @ 1927 ns6h 29m
22 Jun 2024 @ 125819h 32m
21 Jun 2024 @ 1725:4019m 6s 12h 56m
21 Jun 2024 @ 0429 wc6h 26m
20 Jun 2024 @ 2203 wc6h 23m
20 Jun 2024 @ 1540 A5h 56m
20 Jun 2024 @ 09446h 29m
20 Jun 2024 @ 0315 wc6h 30m
19 Jun 2024 @ 2045 wc6h 26m
19 Jun 2024 @ 1419 ie6h 21m
19 Jun 2024 @ 0758 wc5h 55m
19 Jun 2024 @ 0203 wc6h 32m
18 Jun 2024 @ 1931 ns wc6h 15m
18 Jun 2024 @ 13166h 17m
18 Jun 2024 @ 065912h 53m
17 Jun 2024 @ 1806 wc12h 27m
17 Jun 2024 @ 0539 ns wc6h 11m
16 Jun 2024 @ 2328 wc6h 18m
16 Jun 2024 @ 1710 wc6h 19m
16 Jun 2024 @ 1051 ns19h 12m
15 Jun 2024 @ 153912h 49m
15 Jun 2024 @ 0250 A5h 59m
14 Jun 2024 @ 2051 ns6h 15m
14 Jun 2024 @ 14366h 24m
14 Jun 2024 @ 081212h 21m
13 Jun 2024 @ 19516h 0m
13 Jun 2024 @ 13515h 10m
13 Jun 2024 @ 084118h 51m
12 Jun 2024 @ 135019m 43s 5h 54m
12 Jun 2024 @ 0756 ie wc11h 7m
11 Jun 2024 @ 2049 ie6h 17m
11 Jun 2024 @ 1432 ie6h 22m
11 Jun 2024 @ 0810 ns12h 14m
10 Jun 2024 @ 19565h 46m
10 Jun 2024 @ 1410 ie18h 12m
09 Jun 2024 @ 1958 ns wc6h 24m
09 Jun 2024 @ 13346h 19m
09 Jun 2024 @ 0715 wc11h 8m
08 Jun 2024 @ 2007 ie wc6h 27m
08 Jun 2024 @ 13406h 23m
08 Jun 2024 @ 0717 ie wc11h 55m
07 Jun 2024 @ 1922 ie5h 42m
07 Jun 2024 @ 1340 ie5h 51m
07 Jun 2024 @ 0749 wc10h 57m
06 Jun 2024 @ 2052 wc6h 8m
06 Jun 2024 @ 14446h 19m
06 Jun 2024 @ 0825 ns11h 54m
05 Jun 2024 @ 2031 wc11h 11m
05 Jun 2024 @ 0920 ns12h 38m
04 Jun 2024 @ 2042 ie5h 53m
04 Jun 2024 @ 1449 ie5h 9m
04 Jun 2024 @ 0940 ns19h 23m
03 Jun 2024 @ 1417 wc6h 24m
03 Jun 2024 @ 075311h 13m
02 Jun 2024 @ 20406h 23m
02 Jun 2024 @ 14176h 5m
02 Jun 2024 @ 0812 ns10h 59m
01 Jun 2024 @ 2113 ns wc5h 45m
01 Jun 2024 @ 15286h 18m
01 Jun 2024 @ 0910 A12h 27m
31 May 2024 @ 2043 ns5h 5m
31 May 2024 @ 1538 ie wc5h 55m
31 May 2024 @ 0943 ie wc5h 27m
31 May 2024 @ 0416 wc11h 43m
30 May 2024 @ 1633 ns wc6h 24m
30 May 2024 @ 1009 wc5h 56m
30 May 2024 @ 0413 wc11h 13m
29 May 2024 @ 1700 wc5h 42m
29 May 2024 @ 1118 wc5h 15m
29 May 2024 @ 0603 wc21h 29m
28 May 2024 @ 0834 ns11h 24m
27 May 2024 @ 2110 ie wc6h 34m
27 May 2024 @ 1436 ns6h 26m
27 May 2024 @ 08106h 35m
27 May 2024 @ 0135 wc6h 31m
26 May 2024 @ 1904 ie wc6h 23m
26 May 2024 @ 12415h 59m
26 May 2024 @ 064212h 32m
25 May 2024 @ 1810 ie wc5h 56m
25 May 2024 @ 1214 ie wc5h 37m
25 May 2024 @ 0637 wc6h 25m
25 May 2024 @ 0012 wc5h 51m
24 May 2024 @ 1821 ie5h 11m
24 May 2024 @ 13106h 17m
24 May 2024 @ 06535h 8m
24 May 2024 @ 0145 wc6h 29m
23 May 2024 @ 1916 ns wc6h 17m
23 May 2024 @ 1259 wc6h 26m
23 May 2024 @ 0633 ie wc6h 5m
23 May 2024 @ 0028 ie wc5h 26m
22 May 2024 @ 1902 wc6h 22m
22 May 2024 @ 1240 wc6h 17m

Interval Statistics

Interval Count100
Min5h 5m
Max21h 29m
Mean8h 16m
Median6h 24m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
35508 24 Jun 2024 @ 0834 --- CraigC in overflow
35443 22 Jun 2024 @ 1250 --- CraigC in overflow
35305 18 Jun 2024 @ 1240 --- aferrara Boiling, overflowing, weak and intermittent keyhole
35255 16 Jun 2024 @ 1547 --- Forestbewithyou In overflow and doing some small splashing at times but variable.
35161 13 Jun 2024 @ 0704 --- JimS Already in overflow at this time
35138 12 Jun 2024 @ 0721 --- Art Already in overflow
34988 08 Jun 2024 @ 1137 --- RMichaels Entered overflow at 1137.
34862 03 Jun 2024 @ 1223 --- Graham In overflow
34788 31 May 2024 @ 1609 --- Stephen_Gemar Post eruptive. Just steaming; no overflow or boiling.
34678 26 May 2024 @ 0637 --- CraigC in overflow
34650 24 May 2024 @ 0639 --- CraigC in good overflow
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
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.