Last Known Eruption
38y 38d 6h 59m ago

Latest Eruptions

Eruption DurationInterval
29 Aug 1984 @ 21013y 3d 3h 2m
27 Aug 1981 @ 1758:441m 33s 8m 45s
27 Aug 1981 @ 1749:591m 21s 9m 22s
27 Aug 1981 @ 1740:371m 7s 8m 55s
27 Aug 1981 @ 1731:421m 16s 9m 46s
27 Aug 1981 @ 1721:561m 13s 9m 16s
27 Aug 1981 @ 1712:401m 8s 11m 26s
27 Aug 1981 @ 1701:141m 39s 13m 34s
27 Aug 1981 @ 1647:401m 37s 4d 21h 26m 2s
22 Aug 1981 @ 1921:3844s 11m
22 Aug 1981 @ 191038s 1m
22 Aug 1981 @ 1908:281m 12s 10m 9s
22 Aug 1981 @ 1858:191m 39s 9m 21s
22 Aug 1981 @ 1848:581m 30s 4m 28s
22 Aug 1981 @ 1844:302m 59s 14m 21s
22 Aug 1981 @ 1830:0950s 2m 5s
22 Aug 1981 @ 1828:041m 10s 14m 47s
22 Aug 1981 @ 1813:172m 10m 53s
22 Aug 1981 @ 1802:242m 11m
22 Aug 1981 @ 175115d 2h 25m
07 Aug 1981 @ 1526:001m 43s 3m 32s
07 Aug 1981 @ 1522:288m 13s
07 Aug 1981 @ 1514:152m 34s 9m 29s
07 Aug 1981 @ 1504:462m 40s 4m 1s
07 Aug 1981 @ 1500:45 min13m 52s
07 Aug 1981 @ 1446:533m 36s 1m 12s
07 Aug 1981 @ 1445:415m 4s 8m 6s
07 Aug 1981 @ 1437:352m 22s 6d 22h 14m 30s
31 Jul 1981 @ 1623:057m 53s
31 Jul 1981 @ 1615:128m 44s
31 Jul 1981 @ 1606:285m 56s
31 Jul 1981 @ 1600:327m 44s
31 Jul 1981 @ 1552:486m 33s
31 Jul 1981 @ 1546:156m 58s
31 Jul 1981 @ 1539:175m 55s
31 Jul 1981 @ 1533:22 min6m 36s
31 Jul 1981 @ 1526:467m 25s
31 Jul 1981 @ 1519:217m 5s
31 Jul 1981 @ 1512:167m 32s
31 Jul 1981 @ 1504:448m 1s
31 Jul 1981 @ 1456:436m 8s
31 Jul 1981 @ 1450:3521h 55m 46s
30 Jul 1981 @ 1654:49 maj3m 26s 6m 29s
30 Jul 1981 @ 1648:2059s 7m 44s
30 Jul 1981 @ 1640:36 maj2m 31s 6m
30 Jul 1981 @ 1634 maj1m 19s 8m
30 Jul 1981 @ 1625:20 maj2m 27s 7m 22s
30 Jul 1981 @ 1617:58 maj2m 54s 7m 34s
30 Jul 1981 @ 1610:24 maj2m 2d 3h 37m 34s
28 Jul 1981 @ 1232:504m 15s 7m 40s
28 Jul 1981 @ 1225:104m 30s 7m 45s
28 Jul 1981 @ 1217:254m 15s 7m 50s
28 Jul 1981 @ 1209:354m 5s 7m 0s
28 Jul 1981 @ 1202:353m 28s 7m 35s
28 Jul 1981 @ 1155:003m 35s 9m 6s
28 Jul 1981 @ 1145:544m 26s 7m 14s
28 Jul 1981 @ 1138:403m 27s 9m
28 Jul 1981 @ 11295m 20s 6d 18h 32m
21 Jul 1981 @ 1656:273m 47s 9m 2s
21 Jul 1981 @ 1647:254m 55s 8m 36s
21 Jul 1981 @ 1638:494m 13s 1m 29s
21 Jul 1981 @ 1637:20 maj4m 13s 4m 55s
21 Jul 1981 @ 1632:251m 40s 8m 27s
21 Jul 1981 @ 1623:58 maj3m 52s 7m 23s
21 Jul 1981 @ 1616:35 min2m 44s 9m 15s
21 Jul 1981 @ 1607:204m 4s 15m 50s
21 Jul 1981 @ 1551:302m 58s 3m 2s
21 Jul 1981 @ 1548:283m 28s 6m 4s
21 Jul 1981 @ 1542:243m 42s 6m 6s
21 Jul 1981 @ 1536:18 min2m 34s 7m 54s
21 Jul 1981 @ 1528:242m 58s 10m 44s
21 Jul 1981 @ 1517:403m 40s 5m 31s
21 Jul 1981 @ 1512:092m 11s 7m 36s
21 Jul 1981 @ 1504:333m 1s 1m 59s
21 Jul 1981 @ 1502:34 min35s 6m 12s
21 Jul 1981 @ 1456:222m 52s 7m 3s
21 Jul 1981 @ 1449:193m 14s 7m 35s
21 Jul 1981 @ 1441:443m 6s 9m 22s
21 Jul 1981 @ 1432:224m 54s 3m 24s
21 Jul 1981 @ 1428:582m 45s 7m 45s
21 Jul 1981 @ 1421:133m 36s 7m 16s
21 Jul 1981 @ 1413:573m 17s 7m 43s
21 Jul 1981 @ 1406:143m 4s 7m 36s
21 Jul 1981 @ 1358:383m 15s 9m 26s
21 Jul 1981 @ 1349:124m 9s 4m 57s
21 Jul 1981 @ 1344:151m 33s 7m 35s
21 Jul 1981 @ 1336:40 maj3m 18s 9m 47s
21 Jul 1981 @ 1326:534m 1s 4m 47s
21 Jul 1981 @ 1322:061m 47s 9m 14s
21 Jul 1981 @ 1312:52 maj5m 6s 2m 43s
21 Jul 1981 @ 1310:091m 11s 9m 15s
21 Jul 1981 @ 1300:545m 4s 2m 27s
21 Jul 1981 @ 1258:271m 45s 8m 37s
21 Jul 1981 @ 1249:50 maj4m 38s 3m 30s
21 Jul 1981 @ 1246:202m 12s 7m 27s
21 Jul 1981 @ 1238:533m 31s 6m 11s
21 Jul 1981 @ 1232:423m 1s 8m 32s
21 Jul 1981 @ 1224:104m 53s
21 Jul 1981 @ 1219:172m 6s 8m 21s
21 Jul 1981 @ 1210:56 maj3m 59s 5m

Interval Statistics

Interval Count100
Min1m
Max3y 3d 3h 2m
Mean11d 8h 29m
Median7m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
23254 18 Aug 2022 @ 1843 --- MAB Sunday and Colloidal both appear over full - channel into Scummy has water
22525 12 Jul 2022 @ 1135 --- cb clear and blue again
22285 02 Jul 2022 @ 1050 02 Jul 2022 @ 1249 cb Cloudy blue in color with 2 small boils. not flowing into Scummy pool
22177 28 Jun 2022 @ 1356 --- cb blueish in color with a small boil in a gew ateas of the pool
21446 23 May 2022 @ 1215 --- MAB a few random bubbles
19998 16 Oct 2021 @ 1202 --- cb Sunday and Colloidal spring's pools have cleared & are no longer murky/muddy pools.
19920 06 Oct 2021 @ 1413 --- cb Pool is cloudy light brown color and more blue green in the center with 2 boiling points on the northern side of the pool and the east end. Colloidal Pool was mostly blue green and fairly clear for the past few weeks. Today it looks like thick chocolate milk. it has a few boils on the north end of the pool closest to Constant.
7620 11 Feb 1984 @ 1800 --- research-mab 02/11/1984 Sunday Geyser – Dormant, opal blue mod turbid, gasy at NW end 120gpm 85º
4665 08 Jul 1982 @ 1800 --- research-mab 7/8/1982 Sunday Geyser – Occasionally bursts to height of boardwalk Tomas
4653 27 Aug 1981 @ 1600 --- research-mab 8/27/1981 (Undated in log – placed on 27th based on log order) Lognote: Sunday Geyser is erupting at maximum 15 feet, but most eruptions are in the 5-10 foot ranges. The major activity is out of the left vent as seen from Africa, but there are quite a few comparable bursts out of the right vent. The action from the right vent increases as the left vent wanes. Activity in the left vent continues through the quiet period, so I’ve stopped using that as start of preplay. I am still using the start of 5 foot play from the left vent as the start of majors. Grover S
4863 26 Aug 1981 @ 1800 --- research-mab 8/26/81 The museum crew left today. They did an absolutely fantastic job. Gave them a final intimate tour of Porcelain Basin. Everything erupted for them (Sunday, Fireball, Arsenic, Basin, Constant, Big Whirligig, Splutter Pot, Blue and Graceful)
4650 22 Aug 1981 @ 1930 --- research-mab 8/22/1981 Sunday Geyser is resuming its behavior of Aug 7. The left vent as seen from Africa is occasionally having bursts of 20 feet or so, but most are 12 feet. Activity is continuous through quiet period. The minor activity is splashing 2 feet with occasional 3 ft bursts all from the right vents. I record start of preplay as when action starts in the left vent. Start of major play is when I saw bursts of more than 5 ft or so out of the left vents. Some eruptions are split in two by a quiet period that looks similar to preplay. The second is larger than the first of the 2.
4651 22 Aug 1981 @ 1835 --- research-mab 8/22/1981 Sunday Some bursts from right vent as seen from Africa geyser are as large as the left vent bursts. These come as activity in left vent subsides. Sunday’s majors are synchronous with Africa crater fills. Africa is filling to within 3 inches of crater rim. The second eruption of those separated by a 2m interval did not have the accompanying Africa of other majors. Grover Schrayer III
4642 14 Aug 1981 @ 1900 --- research-mab 8/14/1981 Sunday Geyser – Sunday is constantly active with irreg. increases and decreases in eruption. The eruptions at their heights are smaller than last week. Times of major eruptions are rather impossible to determine being so indistinct. I saw no water in Africa geyser crater. Arsenic Geyser is in perpetual spluttering as is Moxie and 2 other small spouters. Fireball is somewhat weak. Grover Schrayer III
4658 07 Aug 1981 @ 1800 --- research-mab 8/7/1981 Today I saw no water in Africa’s crater. If it is still filling in concert with Sunday’s majors it certainly isn’t visible from the boardwalk. Sunday isn’t as regular as July 30th. Also, some of the eruptions come in 2 parts separated by a lull in major activity. After the pause the eruption comes back, usually stronger. The eruptions are in the 15-20 foot range. Grover Schrayer III
4639 30 Jul 1981 @ 1900 --- research-mab 7/30/1981: Sunday doesn’t drain as it has in weeks past. The eruption now takes place out of numerous vents apparently along a fissure. As seen from Africa, the left vent erupts the highest (closest to trail), but the former major vent still has bursts to equal it. Boiling and small eruptions are continuous through the quiet period. Africa is filling higher in the crater again. It still fills in concert with Sunday preplay. Africa is filling to 2 inches from the rim. The strongest part of Sunday’s major seems to come with start of drain of Africa. After major activity subsides in all vents, the old major vent has some six foot bursts, but soon quiets to 2-3 feet doming. Report and observations by Grover Schrayer III
4638 27 Jul 1981 @ 1900 --- research-mab 7/27/1981 *Sundays eruptions are weaker than last week. The former minor vent is starting the main action, but all the {vents? Missing word} are involved in the eruption. Noticed small frying pan type bubblers in Sunday’s runoff channel. Grover
4636 26 Jul 1981 @ 1900 --- research-mab 7/26/1981 Sunday Geyser eruptions seem weaker today
4635 13 Jul 1981 @ 1900 --- research-mab 7/13/1981: Sunday Geyser is still increasing in height. It is having 3 types of eruptions; majors, short majors, and majors coming from left vent as seen from Africa. For the first several minutes after a major eruption, there is no activity in the craters, but activity steadily increases to a major once it has started. One one eruption today, the left vent took over major play after several seconds of play from both vents. The activity is about as high from that vent as the other when it is active. The water is ejected in 3 jets, in a fan shape. Grover Schrayer III
4633 04 Jul 1981 @ 1900 --- research-mab 7/4/1981: Sunday’s eruptions continue to gain strength. Each has some 40-45 foot bursts. Between majors the activity is mostly heavy boils with occasional periods of 3 ft eruptions. The quiet period is sometimes punctuated by minor short eruptions of larger 10 ft bursts. Looking toward Africa, a vent of Sunday to the left of the main vent is erupting to 2 ft or so. The beginning of Sunday’s majors are still synchronous with Africa’s fill. However, they last well after Africa’s drain. Africa’s fill is only sometimes high enough to be seen from the walk, but each time it tries {?}, it has been synchronous with Sunday’s major start.
4632 28 Jun 1981 @ 1900 --- research-mab 6/28/1981: Sunday is erupting over the boardwalk frequently & the water is HOT! I’ve noticed people standing next to it to have their pictures taken. We may have a problem.
4631 26 Jun 1981 @ 1900 --- research-mab 6/26/1981 Sunday bursts every 6-8 min but the intervals have 1-2’ continuous bursts
4630 24 Jun 1981 @ 1900 --- research-mab 6/24/1981 Africa and Sunday Geysers still are roughly synchronous on start times, but Sunday continues well after Africa start of drain. Saw one burst from Sunday that surely must have exceeded 35 ft. Difficult to see Africa filling, so starts of Africa’s fills after major start in Sunday could be due to poor visibility from the boardwalk. Sunday had a short eruption resembling a major at 1800:35 Grover S
4627 09 Jun 1981 @ 1800 --- research-mab 6/9/1981 SUNDAY Schrayer saw that at each of the first three times Sunday erupted Africa’s pool would be simultaneously full and overflowing. For the fourth eruption of Sunday that Grover caught Africa’s level only came to up to 6 inches below the rim.
4624 04 Jun 1981 @ 1800 --- research-mab 6/4/1981 Africa Geyser – dormant, Sunday Geyser active
4607 02 Jun 1981 @ 1800 --- research-mab 6/2/1981 Sunday Geyser Appears to have taken energy from Africa’s system. Eruptions of turbid gray water to 20 feet were occurring every five minutes. Considerable overflow was leaving the area.
5084 23 Jun 1980 @ 1800 --- research-mab 06/23/1980 Sunday Geyser dropped 6 inches
5119 31 Aug 1977 @ 1800 --- research-mab 08/31/1977 Sunday Geyser’s water level has risen approximately 1 ½ feet. Hurricane Vent’s level has declined 8-10”
7139 23 Jul 1966 @ 1800 --- research-mab 07/23/1966 Sunday – More active than any other time this season – Some bursts 20’ {no specific times}
7105 07 Jul 1966 @ 0925 --- research-mab 07/07/1966 Sunday – Visitor reported play of 15’ burst saw no evidence around pool. ?? It did seem a little more vigorous than usual, though. 9:25a Report by Doug Warburton.
7099 05 Jul 1966 @ 1630 --- research-mab 07/05/1966 Sunday – more active than usual 4:30p
20563 19 Jul 1965 @ 1800 --- research-mab 07/19/1965 Flotsam & Sunday – Both have been extremely active all day. Some of the eruptions of Flotsam were 25-30’. The eruptions of Sunday were frm 5-15’. [Note Flotsam/Basin is not added to GT yet - generic end of day time]
6927 13 Jul 1965 @ 0900 --- research-mab 07/13/1965 Sunday – Noticed increased activity at this spot yesterday. Putting out more H2O this am.
6784 23 Oct 1964 @ 1800 --- research-mab 10/23/1964 Sunday is intermittent again.
6776 17 Oct 1964 @ 1800 --- research-mab 10/17/1964 Sunday Geyser is intermittent again.
6741 09 Oct 1964 @ 1800 --- research-mab 10/09/1964 Sunday is still murky & plays steadily.
6714 05 Oct 1964 @ 1800 --- research-mab 10/05/1964 Porcelain Basin observed from 3:30 pm to 4:30 pm Sunday is still murky gray and steadily active.
6708 04 Oct 1964 @ 1800 --- research-mab 10/04/1964 Sunday Geyser is still more active then pre-yesterday but now has occasional periods of quiet.
6697 03 Oct 1964 @ 1800 --- research-mab 10/03/1964 Sunday Geyser erupted continuously all day from a few feet to 15 feet.
6716 27 Aug 1964 @ 1800 --- research-mab 08/27/1964 Sunday – 10’-20’ high for 2-3 mins every 12-18 min.
6732 26 Aug 1964 @ 1800 --- research-mab 08/26/1964 Sunday- continues as of Aug 15
6626 25 Aug 1964 @ 1800 --- research-mab 08/25/1964 Milky - Hereafter this geyser will be referred to as Sunday geyser. It continues 25’-30’ every 12-15min.
6729 24 Aug 1964 @ 1800 --- research-mab 08/24/1964 {SUNDAY} Milky – continues same as yesterday.
6724 23 Aug 1964 @ 1800 --- research-mab 08/23/1964 Milky {SUNDAY} – Still 25-30’ every 12’-15’. Still causing roaring steam from vent near walk by Hurricane Vent fence.
6722 22 Aug 1964 @ 1800 --- research-mab 08/22/1964 Milky {SUNDAY} – Still having eruptions 25’-30’ high today. Every 12-15 min duration 2-3 min.
6812 19 Jul 1964 @ 1800 --- research-mab 07/19/1964 Milky {SUNDAY} – Still 2’-3’ & clearing
6810 16 Jul 1964 @ 0900 --- research-mab 07/16/1964 Milky Geyser –(SUNDAY) Considerable less activity this morning (as compared to when it first went off. Also putting out considerable less H20 than before. {generic AM- no specific time}
6655 13 Jul 1964 @ 0900 --- research-mab 07/13/1964 Milky Geyser – The “new” geyser which started at 2:40 pm yesterday is still active this A.M. at 3’ or 4’ but is milky rather than muddy. {AM - no time noted}
No attachments for this geyser.
Baseline does not exist.