Last Known Eruption
13h 34m ago

Latest Eruptions

Eruption DurationInterval
28 Jun 2022 @ 17046h 19m
28 Jun 2022 @ 10455h 59m
28 Jun 2022 @ 0446 ns wc6h 27m
27 Jun 2022 @ 2219 wc6h 25m
27 Jun 2022 @ 1554 ie wc6h 24m
27 Jun 2022 @ 09306h 40m
27 Jun 2022 @ 0250 ie wc6h 27m
26 Jun 2022 @ 20236h 29m
26 Jun 2022 @ 13546h 26m
26 Jun 2022 @ 07285h 51m
26 Jun 2022 @ 0137 ns wc6h 25m
25 Jun 2022 @ 19125h 56m
25 Jun 2022 @ 13166h 20m
25 Jun 2022 @ 06566h 23m
25 Jun 2022 @ 0033 ns wc6h 5m
24 Jun 2022 @ 1828 ie wc6h 38m
24 Jun 2022 @ 1150 ie wc6h 30m
24 Jun 2022 @ 0520 ns wc12h 42m
23 Jun 2022 @ 1638 ? ie wc6h 19m
23 Jun 2022 @ 1019 ns6h 24m
23 Jun 2022 @ 0355 ns wc6h 0m
22 Jun 2022 @ 2155 wc12h 59m
22 Jun 2022 @ 0856 ns wc6h 28m
22 Jun 2022 @ 0228 ns wc6h 21m
21 Jun 2022 @ 2007 wc5h 52m
21 Jun 2022 @ 14156h 25m
21 Jun 2022 @ 0750 ie6h 5m
21 Jun 2022 @ 0145 ns wc6h 18m
20 Jun 2022 @ 1927 ie wc6h 20m
20 Jun 2022 @ 1307 ns wc5h 20m
20 Jun 2022 @ 0747 ie wc5h 39m
20 Jun 2022 @ 0208 ns wc5h 5m
19 Jun 2022 @ 2103 ie wc6h 19m
19 Jun 2022 @ 1444 ns5h 14m
19 Jun 2022 @ 0930 ie wc1d 6h 52m
18 Jun 2022 @ 0238 ns wc6h 21m
17 Jun 2022 @ 20176h 20m
17 Jun 2022 @ 135720m 6h 19m
17 Jun 2022 @ 0738 ns wc6h 11m
17 Jun 2022 @ 0127 ns wc5h 7m
16 Jun 2022 @ 202012h 17m
16 Jun 2022 @ 0803 ns wc6h 7m
16 Jun 2022 @ 0156 wc5h 9m
15 Jun 2022 @ 2047 ie12h 45m
15 Jun 2022 @ 0802 ie wc11h 19m
14 Jun 2022 @ 2043 ie5h 15m
14 Jun 2022 @ 15286h 23m
14 Jun 2022 @ 09056h 18m
14 Jun 2022 @ 0247 ns wc6h 10m
13 Jun 2022 @ 2037 ie6h 19m
13 Jun 2022 @ 14186h 10m
13 Jun 2022 @ 0808 ns wc5h 56m
13 Jun 2022 @ 0212 ns wc6h 3m
12 Jun 2022 @ 2009 wc6h 16m
12 Jun 2022 @ 1353 ns18h 53m
11 Jun 2022 @ 19006h 9m
11 Jun 2022 @ 12516h 18m
11 Jun 2022 @ 06336h 22m
11 Jun 2022 @ 0011 ns wc6h 29m
10 Jun 2022 @ 1742 ie6h 29m
10 Jun 2022 @ 11136h 23m
10 Jun 2022 @ 0450 ns wc6h 0m
09 Jun 2022 @ 2250 ns wc6h 19m
09 Jun 2022 @ 1631 ns6h 21m
09 Jun 2022 @ 101012h 44m
08 Jun 2022 @ 2126 wc5h 59m
08 Jun 2022 @ 1527 ie6h 6m
08 Jun 2022 @ 092112h 37m
07 Jun 2022 @ 2044 ie5h 17m
07 Jun 2022 @ 15276h 23m
07 Jun 2022 @ 090412h 32m
06 Jun 2022 @ 2032 wc6h 43m
06 Jun 2022 @ 13496h 3m
06 Jun 2022 @ 0746 ie wc11h 50m
05 Jun 2022 @ 1956 ie wc6h 24m
05 Jun 2022 @ 133220m 5s 6h 12m
05 Jun 2022 @ 0720 ie wc4h 37m
05 Jun 2022 @ 0243 ie wc6h 32m
04 Jun 2022 @ 20116h 20m
04 Jun 2022 @ 13516h 21m
04 Jun 2022 @ 073011h 27m
03 Jun 2022 @ 2003 ie wc6h 38m
03 Jun 2022 @ 13256h 19m
03 Jun 2022 @ 07065h 59m
03 Jun 2022 @ 0107 ns wc6h 27m
02 Jun 2022 @ 18406h 21m
02 Jun 2022 @ 12196h 8m
02 Jun 2022 @ 0611 ie13h 7m
01 Jun 2022 @ 1704 ie wc6h 13m
01 Jun 2022 @ 105112h 54m
31 May 2022 @ 2157 ns wc6h 27m
31 May 2022 @ 1530 A6h 24m
31 May 2022 @ 090613h 5m
30 May 2022 @ 20015h 12m
30 May 2022 @ 1449 ie17h 57m
29 May 2022 @ 2052 ns6h 33m
29 May 2022 @ 14196h 23m
29 May 2022 @ 075612h 23m
28 May 2022 @ 1933 ie wc6h 23m
28 May 2022 @ 1310 ns6h 20m

Interval Statistics

Interval Count100
Min4h 37m
Max1d 6h 52m
Mean7h 32m
Median6h 21m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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
20158 28 Oct 2021 @ 1355 --- DanS In overflow
20032 18 Oct 2021 @ 1013 --- cb in overflow
19632 17 Sep 2021 @ 0946 --- CrisG no overflow yet. no water visible in crater.
19600 16 Sep 2021 @ 1037 --- aferrara First splash in upper vent
19598 16 Sep 2021 @ 0955 16 Sep 2021 @ 1000 aferrara Keyhole started in this time range
19553 14 Sep 2021 @ 0717 --- CrisG not in overflow yet
19431 10 Sep 2021 @ 1425 --- RLJones Riverside is not in overflow. The sign is updated and is calling for an eruption at 1700 +\- 30
19235 01 Sep 2021 @ 1159 --- Barbara Lasseter Start of overflow
18955 18 Aug 2021 @ 0939 --- aferrara Bubbler behind main vent on.
18954 18 Aug 2021 @ 0925 --- aferrara In overflow, no bubbler
18873 09 Aug 2021 @ 0619 --- JimS Already in overflow.
18859 07 Aug 2021 @ 1211 --- aferrara In overflow, bubbler on.
18857 07 Aug 2021 @ 0815 --- Suzanne well past eruptive
18856 07 Aug 2021 @ 0605 --- JimS Already in overflow.
18845 06 Aug 2021 @ 0618 --- JimS Already in overflow.
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
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.