Last Known Eruption
4h 15m ago
Predicted Next Eruption
Aug 04 at 0137 ± 25 minutes

Latest Eruptions

Eruption DurationInterval
03 Aug 2021 @ 1939 ie5h 45m
03 Aug 2021 @ 13546h 11m
03 Aug 2021 @ 0743 ns12h 10m
02 Aug 2021 @ 1933 wc6h 18m
02 Aug 2021 @ 13155h 52m
02 Aug 2021 @ 0723 ie wc11h 51m
01 Aug 2021 @ 19326h 11m
01 Aug 2021 @ 1321 ie wc6h 17m
01 Aug 2021 @ 0704 ie wc12h 29m
31 Jul 2021 @ 1835 wc6h 14m
31 Jul 2021 @ 12216h 11m
31 Jul 2021 @ 0610 ns wc11h 23m
30 Jul 2021 @ 18476h 6m
30 Jul 2021 @ 1241 ie5h 57m
30 Jul 2021 @ 0644 ie5h 57m
30 Jul 2021 @ 0047 ie wc6h 12m
29 Jul 2021 @ 18356h 10m
29 Jul 2021 @ 122519.5m 6h 5m
29 Jul 2021 @ 0620 ie5h 32m
29 Jul 2021 @ 0048 ie wc5h 46m
28 Jul 2021 @ 19025h 59m
28 Jul 2021 @ 1303 ie wc6h 32m
28 Jul 2021 @ 0631 ns18h 51m
27 Jul 2021 @ 11406h 18m
27 Jul 2021 @ 0522 wc12h 45m
26 Jul 2021 @ 16376h 15m
26 Jul 2021 @ 10226h 17m
26 Jul 2021 @ 0405 wc6h 4m
25 Jul 2021 @ 2201 wc5h 9m
25 Jul 2021 @ 16526h 16m
25 Jul 2021 @ 1036 ie6h 19m
25 Jul 2021 @ 0417 wc4h 38m
24 Jul 2021 @ 2339 wc6h 7m
24 Jul 2021 @ 17326h 17m
24 Jul 2021 @ 11156h 20m
24 Jul 2021 @ 0455 wc6h 24m
23 Jul 2021 @ 2231 ns wc6h 12m
23 Jul 2021 @ 1618:256h 15m
23 Jul 2021 @ 1003206h 23m
23 Jul 2021 @ 0340 wc5h 51m
22 Jul 2021 @ 21495h 6m
22 Jul 2021 @ 16436h 14m
22 Jul 2021 @ 1028:5512h 17m
21 Jul 2021 @ 22115h 7m
21 Jul 2021 @ 17045h 41m
21 Jul 2021 @ 112312h 22m
20 Jul 2021 @ 2301 wc6h 19m
20 Jul 2021 @ 16426h 8m
20 Jul 2021 @ 10346h 34m
20 Jul 2021 @ 0400 A11h 16m
19 Jul 2021 @ 1644 ie5h 9m
19 Jul 2021 @ 113519m 28s 6h 19m
19 Jul 2021 @ 0516 ns wc6h 19m
18 Jul 2021 @ 2257 ns wc6h 6m
18 Jul 2021 @ 1651 ns5h 6m
18 Jul 2021 @ 11455h 44m
18 Jul 2021 @ 0601 ie6h 20m
17 Jul 2021 @ 2341 ns wc6h 19m
17 Jul 2021 @ 1722~20m 6h 16m
17 Jul 2021 @ 11066h 13m
17 Jul 2021 @ 0453 wc5h 14m
16 Jul 2021 @ 2339 wc6h 18m
16 Jul 2021 @ 172120m 5s 6h 12m
16 Jul 2021 @ 1108:3020m 20s 6h 15m
16 Jul 2021 @ 0453 ns wc12h 38m
15 Jul 2021 @ 161518m 50s 6h 1m
15 Jul 2021 @ 1014 ns wc5h 3m
15 Jul 2021 @ 051112h 16m
14 Jul 2021 @ 16556h 14m
14 Jul 2021 @ 104119m 18h 38m
13 Jul 2021 @ 16036h 2m
13 Jul 2021 @ 1001 ie17h 29m
12 Jul 2021 @ 16326h 12m
12 Jul 2021 @ 102019.5m 18h 32m
11 Jul 2021 @ 1547:2019m 40s 6h 9m
11 Jul 2021 @ 093819m 54s 11h 42m
10 Jul 2021 @ 2156 ie wc6h 23m
10 Jul 2021 @ 15336h 21m
10 Jul 2021 @ 091211h 52m
09 Jul 2021 @ 21206h 22m
09 Jul 2021 @ 14586h 4m
09 Jul 2021 @ 085411h 17m
08 Jul 2021 @ 2137 ie wc12h 14m
08 Jul 2021 @ 092317h 5m
07 Jul 2021 @ 16186h 9m
07 Jul 2021 @ 100918h 37m
06 Jul 2021 @ 153219m 6h 6m
06 Jul 2021 @ 092617h 58m
05 Jul 2021 @ 1528 ie6h 9m
05 Jul 2021 @ 091911h 54m
04 Jul 2021 @ 2125 wc12h 11m
04 Jul 2021 @ 0914 ie12h 26m
03 Jul 2021 @ 20486h 10m
03 Jul 2021 @ 14386h 13m
03 Jul 2021 @ 082512h 19m
02 Jul 2021 @ 2006 ie6h 26m
02 Jul 2021 @ 1340 A5h 55m
02 Jul 2021 @ 074512h 4m
01 Jul 2021 @ 19415h 52m
01 Jul 2021 @ 1349 ie5h 6m

Interval Statistics

Interval Count100
Min4h 38m
Max18h 51m
Mean8h 1m
Median6h 15m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
18490 18 Jul 2021 @ 0535 --- SteveO In overflow
18338 10 Jul 2021 @ 0810 --- User34 Early overflow
18310 08 Jul 2021 @ 0836 --- JimS Start of overflow at 0836. Eruptions have been between 80 and 120 minutes from start of overflow. I recommend a prediction of 1010.
18236 02 Jul 2021 @ 0653 --- JimS Already in overflow at this time.
18215 01 Jul 2021 @ 0651 --- JimS Start of overflow. Eruptions have been about 80 to about 120 min after start of overflow. Suggest prediction of 0830.
18197 30 Jun 2021 @ 0723 --- JimS Overflow started 0723. Predict eruption at 0920.
18124 28 Jun 2021 @ 0640 --- JimS Overflow started about 0640. Predict eruption at about 0830.
18110 27 Jun 2021 @ 0605 --- JimS Start of overflow at 0605.
18098 26 Jun 2021 @ 0546 --- JimS Already in overflow at this time.
18080 25 Jun 2021 @ 0556 --- JimS In overflow.
18057 23 Jun 2021 @ 1134 --- JimS Overflow started at 1134.
18006 22 Jun 2021 @ 1108 --- K.Cooper Already in overflow
17935 20 Jun 2021 @ 0538 --- JimS Already in overflow.
17899 19 Jun 2021 @ 0553 --- JimS Already in overflow.
17888 18 Jun 2021 @ 1724 --- Art Already in overflow
17877 18 Jun 2021 @ 0548 --- JimS Already in overflow.
17850 16 Jun 2021 @ 1212 --- PamW In overflow when I walked up.
17335 01 Jun 2021 @ 1230 --- ge In overflow on arrival
17271 30 May 2021 @ 1529 --- Stephen_Gemar Another failed push. It stopped overflow for a few seconds.
17270 30 May 2021 @ 1525 --- Stephen_Gemar A failed push that stopped overflow for a few seconds.
17177 25 May 2021 @ 1643 --- User34 Another push and crash, no overflow for 90 seconds
17176 25 May 2021 @ 1625 --- User34 Huge push, afterwards overflow stopped for 1 1/2 to 2 minutes
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.
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.