Last Known Eruption
5h 14m ago
Predicted Next Eruption
Jun 06 at 0245 ± 25 minutes

Latest Eruptions

Eruption DurationInterval
05 Jun 2020 @ 1822 ie wc5h 8m
05 Jun 2020 @ 13145h 40m
05 Jun 2020 @ 07346h 4m
05 Jun 2020 @ 0130 wc11h 46m
04 Jun 2020 @ 134419m 5h 23m
04 Jun 2020 @ 082117m 5h 2m
04 Jun 2020 @ 0319 ns wc4h 47m
03 Jun 2020 @ 2232 ns wc4h 53m
03 Jun 2020 @ 17395h 47m
03 Jun 2020 @ 11525h 32m
03 Jun 2020 @ 0620 ns wc5h 52m
03 Jun 2020 @ 0028 ns wc5h 55m
02 Jun 2020 @ 183319m 5h 54m
02 Jun 2020 @ 1239 ns5h 56m
02 Jun 2020 @ 06435h 55m
02 Jun 2020 @ 0048 ns wc4h 53m
01 Jun 2020 @ 1955 ie wc6h 4m
01 Jun 2020 @ 13515h 30m
01 Jun 2020 @ 0821 ns wc10h 16m
31 May 2020 @ 2204:50 ns16h 9m
31 May 2020 @ 0555 ns wc22h 6m
30 May 2020 @ 0749 ie wc5h 56m
30 May 2020 @ 0153 ns wc5h 48m
29 May 2020 @ 2005 ns wc5h 41m
29 May 2020 @ 1424 ns wc6h 3m
29 May 2020 @ 0821 ns wc11h 59m
28 May 2020 @ 2022 ie wc5h 38m
28 May 2020 @ 1444 ie wc6h 15m
28 May 2020 @ 0829 ie wc10h 49m
27 May 2020 @ 2140 ns wc9h 46m
27 May 2020 @ 1154 ie wc5h 48m
27 May 2020 @ 0606 ns wc12h 0m
26 May 2020 @ 1806 ie wc5h 32m
26 May 2020 @ 1234 ie wc6h 12m
26 May 2020 @ 0622 ns wc1d 11h 40m
24 May 2020 @ 1842 ie wc5h 48m
24 May 2020 @ 1254 ie wc6h 3m
24 May 2020 @ 0651 ns wc12h 7m
23 May 2020 @ 1844 ie wc23h 20m
22 May 2020 @ 1924 ns wc6h 15m
22 May 2020 @ 13096h 4m
22 May 2020 @ 070511h 3m
21 May 2020 @ 2002 ie6h 0m
21 May 2020 @ 1402 ie wc6h 1m
21 May 2020 @ 0801 ns wc22h 43m
20 May 2020 @ 0918 ie wc16h 16m
19 May 2020 @ 1702 ie wc6h 25m
19 May 2020 @ 1037 ie5h 42m
19 May 2020 @ 0455 wc10h 47m
18 May 2020 @ 1808 ns6h 9m
18 May 2020 @ 11595h 56m
18 May 2020 @ 0603 ns wc10h 30m
17 May 2020 @ 1933 ns wc10h 42m
17 May 2020 @ 0851 ns wc11h 42m
16 May 2020 @ 2109 wc11h 23m
16 May 2020 @ 0946 ns wc17h 38m
15 May 2020 @ 1608 ie wc5h 48m
15 May 2020 @ 1020 ie wc18h 3m
14 May 2020 @ 1617 ns wc4h 56m
14 May 2020 @ 1121 ie wc6h 9m
14 May 2020 @ 0512 ns wc12h 1m
13 May 2020 @ 1711 ie wc5h 52m
13 May 2020 @ 1119 ns wc5h 55m
13 May 2020 @ 0524 ns wc11h 25m
12 May 2020 @ 1759 ns wc6h 10m
12 May 2020 @ 1149 ns wc5h 42m
12 May 2020 @ 0607 ns wc10h 55m
11 May 2020 @ 1912 ns wc15h 47m
11 May 2020 @ 0325 ns wc5h 55m
10 May 2020 @ 2130 ns wc5h 57m
10 May 2020 @ 1533 wc4h 55m
10 May 2020 @ 1038 ie wc17h 17m
09 May 2020 @ 1721 ie wc17h 0m
09 May 2020 @ 0021 wc5h 1m
08 May 2020 @ 1920 ns wc4h 52m
08 May 2020 @ 1428 ie wc6h 19m
08 May 2020 @ 0809 wc5h 56m
08 May 2020 @ 0213 ns wc16h 23m
07 May 2020 @ 0950 wc6h 14m
07 May 2020 @ 0336 ns wc6h 4m
06 May 2020 @ 2132 ns wc5h 48m
06 May 2020 @ 1544 ns wc6h 0m
06 May 2020 @ 0944 wc5h 38m
06 May 2020 @ 0406 ns wc4h 54m
05 May 2020 @ 2312 ns18h 23m
05 May 2020 @ 0449 ns wc6h 11m
04 May 2020 @ 2238 ns wc23h 15m
03 May 2020 @ 2323 ns wc5h 39m
03 May 2020 @ 1744 ie wc10h 59m
03 May 2020 @ 0645 ns wc5h 52m
03 May 2020 @ 0053 ns wc6h 1m
02 May 2020 @ 1852 ns wc5h 58m
02 May 2020 @ 1254 ie wc5h 33m
02 May 2020 @ 0721 ie wc12h 28m
01 May 2020 @ 1853 ns wc5h 53m
01 May 2020 @ 1300 ns wc4h 58m
01 May 2020 @ 0802 ie wc11h 0m
30 Apr 2020 @ 2102 ns wc5h 21m
30 Apr 2020 @ 1541 ie wc6h 1m
30 Apr 2020 @ 0940 ns wc10h 42m

Interval Statistics

Interval Count100
Min4h 47m
Max1d 11h 40m
Mean8h 50m
Median6h 2m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
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
1115 25 Jul 2014 @ 0850 --- WillBoekel First overflow 0850
1091 01 Jul 2014 @ 1406 --- WillBoekel First overflow 1406
1060 06 May 2014 @ 1240 --- WillBoekel First overflow 1240
EntrySourceLinkComment
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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