Last Known Eruption
4h 31m ago
Predicted Next Eruption
Today at 2020 ± 25 minutes

Latest Eruptions

Eruption DurationInterval
05 Aug 2020 @ 1422 ie6h 16m
05 Aug 2020 @ 08066h 6m
05 Aug 2020 @ 0200 ns wc5h 24m
04 Aug 2020 @ 2036 ie wc6h 4m
04 Aug 2020 @ 1432 ie6h 14m
04 Aug 2020 @ 0818 ns6h 14m
04 Aug 2020 @ 0204 ns wc6h 8m
03 Aug 2020 @ 1956 ns wc12h 6m
03 Aug 2020 @ 0750 ie6h 4m
03 Aug 2020 @ 0146 ns wc5h 2m
02 Aug 2020 @ 2044 ns wc10h 27m
02 Aug 2020 @ 1017 ie wc5h 6m
02 Aug 2020 @ 0511 ie wc6h 17m
01 Aug 2020 @ 2254 ns wc6h 6m
01 Aug 2020 @ 1648 ie wc6h 0m
01 Aug 2020 @ 104812h 7m
31 Jul 2020 @ 2241 ns wc12h 9m
31 Jul 2020 @ 1032 ie wc1d 12h 3m
29 Jul 2020 @ 2229 ns wc5h 34m
29 Jul 2020 @ 1655 ns wc5h 50m
29 Jul 2020 @ 1105 ie wc5h 42m
29 Jul 2020 @ 0523 ns wc10h 27m
28 Jul 2020 @ 1856 ie wc6h 13m
28 Jul 2020 @ 12436h 3m
28 Jul 2020 @ 064012h 7m
27 Jul 2020 @ 18336h 2m
27 Jul 2020 @ 12315h 57m
27 Jul 2020 @ 0634 ns wc12h 9m
26 Jul 2020 @ 1825 ie wc5h 27m
26 Jul 2020 @ 125818h 6m
25 Jul 2020 @ 1852 ie wc12h 7m
25 Jul 2020 @ 0645 ns wc12h 4m
24 Jul 2020 @ 1841 ie wc6h 6m
24 Jul 2020 @ 12356h 3m
24 Jul 2020 @ 0632 ie wc18h 6m
23 Jul 2020 @ 1226 ns wc6h 1m
23 Jul 2020 @ 062512h 2m
22 Jul 2020 @ 1823 ns4h 55m
22 Jul 2020 @ 13286h 2m
22 Jul 2020 @ 0726 wc12h 17m
21 Jul 2020 @ 19095h 55m
21 Jul 2020 @ 13146h 9m
21 Jul 2020 @ 070512h 4m
20 Jul 2020 @ 1901 ns wc6h 2m
20 Jul 2020 @ 1259 ie5h 49m
20 Jul 2020 @ 0710 ie wc12h 23m
19 Jul 2020 @ 1847 ns wc1d 10h 23m
18 Jul 2020 @ 0824 ns wc18h 7m
17 Jul 2020 @ 1417 ie wc5h 51m
17 Jul 2020 @ 0826 ns10h 48m
16 Jul 2020 @ 2138 ns10h 43m
16 Jul 2020 @ 10556h 3m
16 Jul 2020 @ 0452 ns wc11h 51m
15 Jul 2020 @ 1701 ie6h 13m
15 Jul 2020 @ 10485h 59m
15 Jul 2020 @ 0449 ns wc6h 2m
14 Jul 2020 @ 2247 wc6h 5m
14 Jul 2020 @ 16425h 57m
14 Jul 2020 @ 10456h 6m
14 Jul 2020 @ 0439 ns wc11h 45m
13 Jul 2020 @ 1654 ie wc6h 5m
13 Jul 2020 @ 10491d 5h 52m
12 Jul 2020 @ 0457 ie10h 29m
11 Jul 2020 @ 182819m 5h 58m
11 Jul 2020 @ 12306h 3m
11 Jul 2020 @ 0627 ns wc16h 49m
10 Jul 2020 @ 1338 ie wc6h 15m
10 Jul 2020 @ 0723 ie11h 59m
09 Jul 2020 @ 1924 ie wc12h 17m
09 Jul 2020 @ 0707 ie wc6h 0m
09 Jul 2020 @ 0107 ns wc18h 9m
08 Jul 2020 @ 0658 ie6h 7m
08 Jul 2020 @ 0051 ns wc6h 8m
07 Jul 2020 @ 1843 ns wc5h 57m
07 Jul 2020 @ 1246 ie wc5h 55m
07 Jul 2020 @ 0651 ns5h 53m
07 Jul 2020 @ 0058 wc5h 58m
06 Jul 2020 @ 1900 ie wc6h 6m
06 Jul 2020 @ 12546h 7m
06 Jul 2020 @ 0647 wc6h 11m
06 Jul 2020 @ 0036 ns wc5h 57m
05 Jul 2020 @ 1838:27 ns6h 7m
05 Jul 2020 @ 12315h 54m
05 Jul 2020 @ 0637 ie wc6h 8m
05 Jul 2020 @ 0029 ie wc12h 5m
04 Jul 2020 @ 12245h 54m
04 Jul 2020 @ 0630 ie wc6h 5m
04 Jul 2020 @ 0025 ns wc6h 9m
03 Jul 2020 @ 18165h 42m
03 Jul 2020 @ 1234 ie wc6h 20m
03 Jul 2020 @ 0614 ie wc12h 6m
02 Jul 2020 @ 18085h 56m
02 Jul 2020 @ 12126h 15m
02 Jul 2020 @ 0557 ns wc6h 2m
01 Jul 2020 @ 2355 wc5h 53m
01 Jul 2020 @ 1802 ie5h 29m
01 Jul 2020 @ 12336h 7m
01 Jul 2020 @ 06266h 0m
01 Jul 2020 @ 0026 wc5h 58m
30 Jun 2020 @ 18285h 59m

Interval Statistics

Interval Count100
Min4h 55m
Max1d 12h 3m
Mean8h 39m
Median6h 6m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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
3361 25 Jul 2016 @ 0541 --- JimS Overflow started 0541.
3302 14 Jul 2016 @ 0650 --- JimS Overflow started about 0650. Eruption should be about 0830 to 0900.
3258 07 Jul 2016 @ 2140 --- JarnoO May have erupted. There was some steam visible at 2140 to 2143 in the Riverside spot, but due to the wind there was no visible steam after that.
2990 06 Jun 2016 @ 0729 --- B**2 Start of overflow.
2685 16 Feb 2016 @ 0930 --- AndreaEide Riverside in overflow ~0930
2672 09 Feb 2016 @ 1526 --- ACarlson Riverside started overflow around 15:25.
2668 02 Feb 2016 @ 0940 --- ACarlson In overflow at 0940
2480 05 Oct 2015 @ 0839 --- cb very quiet. no overflow
2461 03 Oct 2015 @ 0818 --- JimS In overflow at 0818.
2442 30 Sep 2015 @ 0610 --- Jake in. overflow
2077 10 Aug 2015 @ 1139 --- RLJones Dry when I arrived at 1135. Overflow started at 1139
2076 10 Aug 2015 @ 0851 --- EmilyW Quiet and empty at 0851
2015 04 Aug 2015 @ 0656 --- RyanMaurer crater empty. no overflow.
1825 02 Jul 2015 @ 0953 --- DaveM Riverside start was 0730wc but GT is using the in basin 0731ie time as the primary.
1726 12 Jun 2015 @ 0820 --- B**2 Start of overflow!
1140 21 Aug 2014 @ 1129 --- WillBoekel first overflow 1129
EntrySourceLinkComment
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.


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