Last Known Eruption
2h 23m ago
Predicted Next Eruption
Today at 1239 ± 25 minutes

Latest Eruptions

Eruption DurationInterval
13 May 2021 @ 0641 ie wc6h 16m
13 May 2021 @ 0025 ie wc5h 57m
12 May 2021 @ 1828 ns wc6h 3m
12 May 2021 @ 1225 ie12h 9m
12 May 2021 @ 0016 ns wc6h 4m
11 May 2021 @ 181218m 5h 44m
11 May 2021 @ 12285h 23m
11 May 2021 @ 0705 ns12h 5m
10 May 2021 @ 1900 ns wc6h 2m
10 May 2021 @ 12585h 51m
10 May 2021 @ 0707 ie5h 58m
10 May 2021 @ 0109 ns wc5h 39m
09 May 2021 @ 1930 ns wc5h 49m
09 May 2021 @ 13415h 40m
09 May 2021 @ 0801 ns wc5h 53m
09 May 2021 @ 0208 ns wc5h 52m
08 May 2021 @ 2016 ns wc5h 53m
08 May 2021 @ 1423 ie wc17h 43m
07 May 2021 @ 2040 ns wc11h 40m
07 May 2021 @ 090011h 17m
06 May 2021 @ 2143 wc5h 55m
06 May 2021 @ 1548 ns wc5h 58m
06 May 2021 @ 09505h 57m
06 May 2021 @ 0353 ns wc5h 57m
05 May 2021 @ 2156 ns wc6h 8m
05 May 2021 @ 1548 ini6h 0m
05 May 2021 @ 0948 ie wc11h 57m
04 May 2021 @ 2151 ns wc6h 4m
04 May 2021 @ 1547 ns wc17h 40m
03 May 2021 @ 2207 wc5h 42m
03 May 2021 @ 1625 wc11h 52m
03 May 2021 @ 0433 ns wc5h 55m
02 May 2021 @ 2238 ns wc5h 56m
02 May 2021 @ 1642 ie wc6h 11m
02 May 2021 @ 1031 wc5h 59m
02 May 2021 @ 0432 ns wc5h 50m
01 May 2021 @ 2242 wc5h 56m
01 May 2021 @ 1646 ns wc11h 23m
01 May 2021 @ 0523 ns wc23h 9m
30 Apr 2021 @ 0614 ns wc5h 55m
30 Apr 2021 @ 0019 wc6h 4m
29 Apr 2021 @ 181511h 49m
29 Apr 2021 @ 0626 ie wc5h 35m
29 Apr 2021 @ 0051 ns wc6h 2m
28 Apr 2021 @ 1849 ns wc6h 1m
28 Apr 2021 @ 12485h 49m
28 Apr 2021 @ 0659 ns wc4h 52m
28 Apr 2021 @ 0207 ns wc5h 56m
27 Apr 2021 @ 2011 ns wc6h 2m
27 Apr 2021 @ 1409 ns wc23h 2m
26 Apr 2021 @ 1507 ie wc6h 2m
26 Apr 2021 @ 0905 wc5h 39m
26 Apr 2021 @ 0326 ns wc5h 49m
25 Apr 2021 @ 2137 ns wc5h 47m
25 Apr 2021 @ 15505h 55m
25 Apr 2021 @ 0955 ie wc5h 36m
25 Apr 2021 @ 0419 ns wc5h 50m
24 Apr 2021 @ 2229 ns wc5h 37m
24 Apr 2021 @ 1652 ns wc5h 17m
24 Apr 2021 @ 1135 ns4h 56m
24 Apr 2021 @ 0639 ns wc6h 2m
24 Apr 2021 @ 0037 ns wc5h 31m
23 Apr 2021 @ 19065h 38m
23 Apr 2021 @ 13285h 45m
23 Apr 2021 @ 0743 ie wc6h 32m
23 Apr 2021 @ 0111 wc4h 49m
22 Apr 2021 @ 2022 ie wc6h 4m
22 Apr 2021 @ 1418 ns wc5h 59m
22 Apr 2021 @ 08196h 5m
22 Apr 2021 @ 0214 wc6h 8m
21 Apr 2021 @ 2006 ns wc5h 57m
21 Apr 2021 @ 1409 ns wc6h 12m
21 Apr 2021 @ 0757 ns wc6h 6m
21 Apr 2021 @ 0151 ns wc6h 13m
20 Apr 2021 @ 1938 ie wc5h 58m
20 Apr 2021 @ 1340 ns wc5h 50m
20 Apr 2021 @ 0750 ns wc5h 50m
20 Apr 2021 @ 0200 ns wc6h 18m
19 Apr 2021 @ 1942 ns wc18h 32m
19 Apr 2021 @ 0110 ns wc6h 3m
18 Apr 2021 @ 1907 ie wc6h 8m
18 Apr 2021 @ 12595h 51m
18 Apr 2021 @ 0708 ie wc6h 9m
18 Apr 2021 @ 0059 ns wc6h 11m
17 Apr 2021 @ 1848 wc6h 3m
17 Apr 2021 @ 1245 ns wc6h 18m
17 Apr 2021 @ 0627 ns wc5h 42m
17 Apr 2021 @ 0045 ns wc6h 14m
16 Apr 2021 @ 1831 ns6h 7m
16 Apr 2021 @ 1224 ie wc11h 45m
16 Apr 2021 @ 0039 ns wc6h 3m
15 Apr 2021 @ 1836 wc5h 57m
15 Apr 2021 @ 1239 ie wc6h 22m
15 Apr 2021 @ 0617 ns wc11h 35m
14 Apr 2021 @ 1842 ie wc5h 31m
14 Apr 2021 @ 1311 ie wc32d 2h 52m
13 Mar 2021 @ 0919 ie1d 21m
12 Mar 2021 @ 0858 ie3d 1m
09 Mar 2021 @ 0857 ie23h 57m
08 Mar 2021 @ 0900 ie23h 45m

Interval Statistics

Interval Count100
Min4h 49m
Max32d 2h 52m
Mean16h 2m
Median6h 1m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
16984 05 May 2021 @ 0927 --- mhvogel In overflow
16981 04 May 2021 @ 0858 --- nomadruss Riverside in overflow and broiling
16807 13 Jan 2021 @ 0942 --- mhvogel In overflow
16805 12 Jan 2021 @ 0956 --- mhvogel Riverside in overflow at 0956
16802 06 Jan 2021 @ 1003 --- mhvogel Currently in overflow.
16455 26 Oct 2020 @ 1426 --- nomadruss Beautiful eruption today.
16443 19 Oct 2020 @ 1156 --- am Not in overflow at this time
16425 14 Oct 2020 @ 1702 --- jonp In overflow
16415 12 Oct 2020 @ 0945 --- William in overflow, no water in back bubbler yet.
16328 04 Oct 2020 @ 1530 --- User34 Just below overflow
16244 24 Sep 2020 @ 1001 --- PamW In overflow
16239 23 Sep 2020 @ 1215 --- PamW An observer indicated Riverside had just finished.
15972 05 Sep 2020 @ 1132 --- jkgood In overflow & back vents on
15960 04 Sep 2020 @ 1855 --- William post eruptive, crater dry
15953 04 Sep 2020 @ 1209 --- TheHikingDude in overflow
15762 28 Aug 2020 @ 0930 28 Aug 2020 @ 0950 B**2 Start of overflow
15107 26 Jul 2020 @ 0805 --- William post eruptive, dry
14885 05 Jul 2020 @ 1224 --- William first observed splash from keyhole vent
14594 11 Jun 2020 @ 1036 --- William post eruptive, dry.
14162 03 Apr 2020 @ 1954 --- JarnoO (wc) Some steam appears to be originating from the Riverside area already, ~1h40m after the previous eruption.
14153 18 Mar 2020 @ 1907 --- JarnoO (wc) Some light steam appearing every so often from roughly its place (probably late ie). Interval until here (about 12h10m) would indicate a double interval assuming ~6h intervals.
14133 22 Feb 2020 @ 1032 --- Art In overflow
13969 24 Oct 2019 @ 1331 --- steve Riverside is in overflow
13859 03 Oct 2019 @ 1540 03 Oct 2019 @ 1728 underarockphoto BVS = back vent splash BVT = back bent thump I sat down at riverside at 15:40. It reached overflow at 15:45. The cone was totally dry so I’m assuming this was first overflow. I took notes of the following surges. The surges had increased boiling, and overflow, specifically enough to put water out over the lip of the cone behind and to the right of the main overflow channel. Surges noted as “+” indicate heavy overflow off the right ledge. “++” indicate overflow off all sides of the cone. 1545: overflow start 1610 1618 1624 1630 1635 1639 1644 1646 1647 1648 1648+ 1650 1652 1700 1703 1703 1704 1707 1707 1710++ BVT, BVS, heavy surging. Pool drained entirely for two minutes. 1712 1713 1716+ 1717+ 1718 1718 1719 1720 BVT 1721 1721+BVS 1725 1725+BVS 1728 1728++BVS 1728 Start
13858 03 Oct 2019 @ 1546 --- underarockphoto Overflow
13857 03 Oct 2019 @ 1542 --- underarockphoto Pool has filled crater and is blurping but has not hit overflow yet.
13674 13 Sep 2019 @ 0900 --- bhoppe Empty, quiet and no water visible. Possibly erupted round 730-8?
13587 06 Sep 2019 @ 0655 --- William empty crater.
13566 05 Sep 2019 @ 0840 --- AngelaT Overflow in process from Main Overflow Channel with splashing from Main Vent.
13323 20 Aug 2019 @ 1158 --- STS New NPS prediction of 17:45
13107 08 Aug 2019 @ 0825 --- AngelaT In overflow of with main vent splashing.
13024 04 Aug 2019 @ 1633 --- Stephen_Gemar Already in overflow, with decent play from the main vent.
12883 31 Jul 2019 @ 0955 --- rbwhitaker In overflow currently. (Did not see first overflow. Based on recent interval data, It's probably been in overflow for a while.)
12878 31 Jul 2019 @ 0815 --- adamdanski12 Mild to moderate overflow at this time with no splashing in any vents.
12862 29 Jul 2019 @ 0834 --- rbwhitaker Riverside went into overflow sometime between 816 and 834.
12834 28 Jul 2019 @ 0855 --- rbwhitaker Now in overflow. Don't know when it started
12830 28 Jul 2019 @ 0724 --- rbwhitaker Not in overflow yet
12819 27 Jul 2019 @ 0844 --- Minafuku In overflow when I arrived at 0844. Splashing in main vent is not sustained, hitting 6” to 18”. Keyhole splashing only to 6”. Posting a prediction of 0945 +/- 30.
12572 24 Jul 2019 @ 0800 --- dank Overflow and splashing in main vent
12487 14 Jul 2019 @ 2002 --- jazzknick Overflow well underway
12380 06 Jul 2019 @ 0848 --- Minafuku In overflow when I arrived at 0848
12087 03 Jul 2019 @ 0805 --- dank In overflow, light splashing in main vent
12055 01 Jul 2019 @ 0806 --- dank Steady overflow, splashing in main vent
11830 16 Jun 2019 @ 1342 --- Polly Post eruptive. Quietly steaming at 1342.
11740 12 Jun 2019 @ 0756 12 Jun 2019 @ 0806 dank Overflow and splashing in main vent, nothing in upper vent yet
11707 10 Jun 2019 @ 1614 --- Bhoffer Riverside is boiling and overflowing.
11704 10 Jun 2019 @ 1408 --- CrisG still no overflow
11701 10 Jun 2019 @ 1401 --- Bhoffer No action at riverside. Past prediction window.
11700 10 Jun 2019 @ 1300 --- Bhoffer Platform dry. Hardly any steam coming out of old vent.
11702 10 Jun 2019 @ 1250 --- CrisG no overflow. cone quietly steaming.
11598 06 Jun 2019 @ 0840 --- B**2 Definitely looks post eruption. Very Dry.
11574 04 Jun 2019 @ 1910 --- William in overflow
11179 06 May 2019 @ 0745 --- RLJones Start of overflow
11178 06 May 2019 @ 0657 --- RLJones Riverside is not in overflow
11149 03 May 2019 @ 1230 --- RLJones First overflow at 1230
11117 28 Apr 2019 @ 1933 --- ddshepard In overflow
11106 27 Apr 2019 @ 1251 --- rbwhitaker In overflow
10715 04 Nov 2018 @ 0805 --- jkgood In overflow
10661 24 Oct 2018 @ 1751 --- STS NPS prediction of 21:15
10560 05 Oct 2018 @ 0810 --- William No water visible in cone.
10342 22 Sep 2018 @ 0900 --- Minafuku Not in overflow as far as I can tell from the bike path...
10303 20 Sep 2018 @ 0807 --- STS NPS prediction of 0945
10057 06 Sep 2018 @ 1039 --- mswindle Not in overflow as of 1 hour ago, was in overflow as of 15 minutes ago. VC posting prediction of 1130.
9429 03 Aug 2018 @ 0958 --- rbwhitaker Currently in overflow
7874 23 Jan 2018 @ 0830 --- DaveM The two times posted (0315 and 0830) don't quite work. Both produced big steam clouds but the interval is too short.
7689 04 Oct 2017 @ 1125 --- Kitt B Riverside is in weak overflow
7536 29 Sep 2017 @ 0750 --- Kitt B heavy steam and low thruming sound -post eruptive
6630 17 Sep 2017 @ 0847 --- JimS First overflow at 0847.
5572 02 Sep 2017 @ 1006 --- JimS Overflow started at 1006.
5515 31 Aug 2017 @ 0630 --- JimS Already in overflow at 0630.
5509 30 Aug 2017 @ 1020 --- Art In overflow
5493 29 Aug 2017 @ 0809 --- JimS Already in overflow at 0809.
5468 28 Aug 2017 @ 0653 --- JimS Already in overflow at 0653.
5400 26 Aug 2017 @ 0804 --- JimS Was on overflow.
5321 25 Aug 2017 @ 0705 --- JimS In overflow at 0705.
5301 24 Aug 2017 @ 0929 --- JimS Overflow started at 0929.
5181 20 Aug 2017 @ 2232 --- Tara Post-eruptive, forced steam
5158 20 Aug 2017 @ 0636 20 Aug 2017 @ 0653 JimS Overflow started between 0636 and 0653.
4925 17 Aug 2017 @ 0627 --- JimS In overflow at 0627.
4881 12 Aug 2017 @ 0624 --- JimS Already in overflow at 0624.
4839 09 Aug 2017 @ 0626 --- JimS Already in overflow at 0626.
4803 05 Aug 2017 @ 0843 --- rbwhitaker Just went into first overflow.
4580 30 Jul 2017 @ 0608 --- JimS In overflow at 0608.
4544 26 Jul 2017 @ 0700 --- JimS In overflow.
4542 26 Jul 2017 @ 0621 --- EmilyW Dead at 0621
4515 23 Jul 2017 @ 0550 --- SteveO In overflow.
4494 19 Jul 2017 @ 0634 --- SteveO Started overflow after 0553 and before 0634.
4384 01 Jul 2017 @ 0825 --- WillBoekel start of overflow
4375 28 Jun 2017 @ 0550 28 Jun 2017 @ 0610 SteveO Started overflow between 0550 & 0610
4363 26 Jun 2017 @ 0711 --- Dave from B Overflow started in last 15 minutes
4201 04 Jun 2017 @ 0836 --- steve Overflow started between 0800 and 0820
4167 01 Jun 2017 @ 0808 --- B**2 Overflow started about 8:00
4118 23 May 2017 @ 0543 --- SteveO In overflow
4033 03 May 2017 @ 1053 --- udo Minor eruptions from upper vent caused main to stop overflowing. Overflow restarted 1056.
4027 02 May 2017 @ 0707 --- JimS In overflow at 0727.
3958 03 Mar 2017 @ 1253 --- WillBoekel Riverside currently in overflow
3902 24 Dec 2016 @ 1550 --- ARoe Quietly steaming. No water.
3842 04 Nov 2016 @ 1226 --- udo Now in overflow
3841 04 Nov 2016 @ 1214 --- udo Not overflowing yet.
3787 15 Oct 2016 @ 1015 --- Kitt B Riverside in over flow, may have just started
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.