Last Known Eruption
5h 13m ago
Predicted Next Eruption
Today at 1518 ± 25 minutes

Latest Eruptions

Eruption DurationInterval
05 Apr 2020 @ 0918 ns wc5h 9m
05 Apr 2020 @ 0409 ns wc6h 1m
04 Apr 2020 @ 2208 ns wc5h 16m
04 Apr 2020 @ 1652 ie wc12h 12m
04 Apr 2020 @ 0440 ns wc5h 9m
03 Apr 2020 @ 2331 ns wc5h 20m
03 Apr 2020 @ 1811 ns wc4h 56m
03 Apr 2020 @ 1315 ns wc5h 5m
03 Apr 2020 @ 0810 ns wc6h 17m
03 Apr 2020 @ 0153 ns wc6h 0m
02 Apr 2020 @ 1953 ie wc17h 32m
02 Apr 2020 @ 0221 ns wc18h 21m
01 Apr 2020 @ 0800 ie wc11h 14m
31 Mar 2020 @ 2046 wc1d 10h 21m
30 Mar 2020 @ 1025 ns wc12h 8m
29 Mar 2020 @ 2217 ns wc5h 4m
29 Mar 2020 @ 1713 ie wc1d 11h 4m
28 Mar 2020 @ 0609 ns wc12h 9m
27 Mar 2020 @ 1800 ie wc6h 21m
27 Mar 2020 @ 1139 ns wc5h 37m
27 Mar 2020 @ 0602 ie wc12h 22m
26 Mar 2020 @ 1740 wc4h 58m
26 Mar 2020 @ 1242 wc5h 38m
26 Mar 2020 @ 0704 ie wc11h 14m
25 Mar 2020 @ 1950 ie wc5h 53m
25 Mar 2020 @ 1357 ie wc6h 20m
25 Mar 2020 @ 0737 ie wc2d 13h 17m
22 Mar 2020 @ 1820 ns wc21h 59m
21 Mar 2020 @ 2021 ns wc6h 3m
21 Mar 2020 @ 1418 ie wc6h 4m
21 Mar 2020 @ 0814 wc12h 23m
20 Mar 2020 @ 1951 ie wc6h 8m
20 Mar 2020 @ 1343 ns wc6h 19m
20 Mar 2020 @ 0724 ns wc12h 11m
19 Mar 2020 @ 1913 wc23h 44m
18 Mar 2020 @ 1929 ie wc12h 36m
18 Mar 2020 @ 0653 ie wc11h 7m
17 Mar 2020 @ 1946 ie wc6h 17m
17 Mar 2020 @ 1329 wc16h 55m
16 Mar 2020 @ 2034 ns wc6h 5m
16 Mar 2020 @ 1429 ns wc21h 27m
15 Mar 2020 @ 1702 ns wc5h 3m
15 Mar 2020 @ 1159 ie wc1d 5h 47m
14 Mar 2020 @ 0612 ie wc12h 23m
13 Mar 2020 @ 1749 wc5h 55m
13 Mar 2020 @ 1154 ie wc3h 51m
13 Mar 2020 @ 0803 ie wc6h 15m
13 Mar 2020 @ 0148 ns wc6h 6m
12 Mar 2020 @ 1942 ns wc12h 17m
12 Mar 2020 @ 0725 ns wc12h 4m
11 Mar 2020 @ 1921 ie wc11h 59m
11 Mar 2020 @ 0722 ns wc11h 38m
10 Mar 2020 @ 1944 ns wc12h 31m
10 Mar 2020 @ 0713 ns wc6h 6m
10 Mar 2020 @ 0107 ns wc5h 59m
09 Mar 2020 @ 1908 ie wc4h 54m
09 Mar 2020 @ 1414 ie wc6h 24m
09 Mar 2020 @ 0750 ie wc6h 14m
09 Mar 2020 @ 0136 ns wc6h 13m
08 Mar 2020 @ 1923 wc5h 56m
08 Mar 2020 @ 1327 ? ie wc17h 29m
07 Mar 2020 @ 1858 ie wc6h 1m
07 Mar 2020 @ 1257 ns wc6h 2m
07 Mar 2020 @ 0655 ie wc6h 8m
07 Mar 2020 @ 0047 ns wc6h 5m
06 Mar 2020 @ 1842 ns wc5h 54m
06 Mar 2020 @ 1248 ns wc6h 21m
06 Mar 2020 @ 0627 ns wc6h 7m
06 Mar 2020 @ 0020 ns wc6h 5m
05 Mar 2020 @ 1815 ns wc6h 3m
05 Mar 2020 @ 1212 ie wc6h 30m
05 Mar 2020 @ 0542 ns wc6h 10m
04 Mar 2020 @ 2332 ns wc6h 26m
04 Mar 2020 @ 1706 ns wc18h 39m
03 Mar 2020 @ 2227 ns wc4h 57m
03 Mar 2020 @ 1730 ns wc5h 30m
03 Mar 2020 @ 1200 ie12h 23m
02 Mar 2020 @ 2337 ns wc5h 59m
02 Mar 2020 @ 1738 ie wc6h 9m
02 Mar 2020 @ 1129 ie wc5h 21m
02 Mar 2020 @ 0608 ns wc12h 3m
01 Mar 2020 @ 1805 ie wc6h 7m
01 Mar 2020 @ 1158 ie wc19h 5m
29 Feb 2020 @ 1653 ns6h 0m
29 Feb 2020 @ 105318h 34m
28 Feb 2020 @ 1619 ns wc6h 8m
28 Feb 2020 @ 1011 ie wc19h 0m
27 Feb 2020 @ 1511 wc6h 16m
27 Feb 2020 @ 0855 ie wc2d 14h 41m
24 Feb 2020 @ 1814 ns wc6h 17m
24 Feb 2020 @ 1157 ie wc18h 40m
23 Feb 2020 @ 17176h 8m
23 Feb 2020 @ 1109 ns wc1d 17h 52m
21 Feb 2020 @ 1717 wc6h 32m
21 Feb 2020 @ 1045 ?17h 58m
20 Feb 2020 @ 1647 ie wc6h 4m
20 Feb 2020 @ 1043 ie wc19h 6m
19 Feb 2020 @ 1537 ie wc6h 13m
19 Feb 2020 @ 0924 ie wc18h 48m
18 Feb 2020 @ 1436 ie wc1d 1h 0m

Interval Statistics

Interval Count100
Min3h 51m
Max2d 14h 41m
Mean11h 28m
Median6h 17m

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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