Last Known Eruption
4d 11h 26m ago

Latest Eruptions

Eruption DurationInterval
17 Sep 2018 @ 1722:181m 45s 44m 21s
17 Sep 2018 @ 1637:57 min44s 42m 5s
17 Sep 2018 @ 1555:52 min43s 2h 19m 59s
17 Sep 2018 @ 1335:534m 50s 37m 31s
17 Sep 2018 @ 1258:22 min30s 37m
17 Sep 2018 @ 1221 min1d 18h 1m
15 Sep 2018 @ 1819:05 min55m 30s
15 Sep 2018 @ 1723:35 min30s 23h 18m
14 Sep 2018 @ 18054m 2s 45m
14 Sep 2018 @ 1720 min~20s 1h 25m
14 Sep 2018 @ 1555 min1h 7m
14 Sep 2018 @ 14484m 6s 41m
14 Sep 2018 @ 1407 min~30s 48m
14 Sep 2018 @ 1319 min1m 5s 1h 53m
14 Sep 2018 @ 11263m 33s 38m
14 Sep 2018 @ 1048 min~30s 36m
14 Sep 2018 @ 1012 min~30s 19h 10m
13 Sep 2018 @ 1502 min23h 32m
12 Sep 2018 @ 1530 maj4m 6s 1h 2m
12 Sep 2018 @ 1428 min1m 13s 57m
12 Sep 2018 @ 1331 min1m 34s 3h 58m
12 Sep 2018 @ 0933 maj3m 43s 55m
12 Sep 2018 @ 0838 min1m 30s 51m
12 Sep 2018 @ 0747 min58s 20h 55m
11 Sep 2018 @ 1052 min58s 1h 32m
11 Sep 2018 @ 0920 A3d 15h 49m
07 Sep 2018 @ 1730:124m 45s 38m 40s
07 Sep 2018 @ 1651:32 min55s 1h 26m 38s
07 Sep 2018 @ 1524:541m 3s 2d 5h 7m
05 Sep 2018 @ 101720h 46m
04 Sep 2018 @ 1331 ie2h 34m
04 Sep 2018 @ 10573m 13s 1h 28m
04 Sep 2018 @ 09295d 15h 11m
29 Aug 2018 @ 1817:213m 30s 6h 21m
29 Aug 2018 @ 1156 ie1d 23h 48m
27 Aug 2018 @ 1208 maj3m 3h 21m
27 Aug 2018 @ 0847 min17h 23m
26 Aug 2018 @ 15242m 46s 1h 6m
26 Aug 2018 @ 1418 min<1m 2h 18m
26 Aug 2018 @ 1200 maj4'451d 4h 49m
25 Aug 2018 @ 0711 ie14h 42m
24 Aug 2018 @ 1629 ie min2h 32m
24 Aug 2018 @ 13574m 30s 2h 21m
24 Aug 2018 @ 11361h 49m
24 Aug 2018 @ 0947 ie1d 16h 46m
22 Aug 2018 @ 17013m 5451m
22 Aug 2018 @ 1610 min6h 21m
22 Aug 2018 @ 09491h 5m
22 Aug 2018 @ 0844 maj~3m 1h 34m
22 Aug 2018 @ 0710 min11m 4d 14h 55m
17 Aug 2018 @ 1615 ie4h 34m
17 Aug 2018 @ 1141 ns min20s 1d 17h 8m
15 Aug 2018 @ 1832:33 min1m 10s 1h 17m
15 Aug 2018 @ 1715 min3h 24m
15 Aug 2018 @ 1351 ie2h 13m
15 Aug 2018 @ 11383+ minutes1h 13m
15 Aug 2018 @ 1025 min52s 1d 23h 51m
13 Aug 2018 @ 10344m 18h 26m
12 Aug 2018 @ 16082m 13s 1h 23m
12 Aug 2018 @ 1445 min49s 1h 6m
12 Aug 2018 @ 13392m 54s 42m
12 Aug 2018 @ 1257 min59s 39m
12 Aug 2018 @ 1218 min~20s 1d 18h 48m
10 Aug 2018 @ 1729:514m 45s 49m 40s
10 Aug 2018 @ 1640:11 min57s 4h 41m 6s
10 Aug 2018 @ 1159:053m 49s 1h 18m 15s
10 Aug 2018 @ 1040:501m 38s 17h 20m
09 Aug 2018 @ 17204m 13s 56m
09 Aug 2018 @ 1624 min1m 16s 1h 19m
09 Aug 2018 @ 15051m 32s 1h 3m
09 Aug 2018 @ 14023m 24s 36m
09 Aug 2018 @ 1326 min22s A59m
09 Aug 2018 @ 1227 min52s 57m
09 Aug 2018 @ 11302m 45s 17h 31m
08 Aug 2018 @ 17593m 50s 45m
08 Aug 2018 @ 1713:21 min1m 7s 1h 16m
08 Aug 2018 @ 1557 min1m 7s 1h 14m
08 Aug 2018 @ 14434m 15s 4h 17m
08 Aug 2018 @ 102617h 55m
07 Aug 2018 @ 1631 maj2h 38m
07 Aug 2018 @ 1353 maj~5m 53m
07 Aug 2018 @ 1300 min19h 36m
06 Aug 2018 @ 1723:253m 34s 54m 59s
06 Aug 2018 @ 1628:26 min40s 1h 24m 8s
06 Aug 2018 @ 1504:183m 50s 57m 46s
06 Aug 2018 @ 1406:32 min45s 1h 36m 49s
06 Aug 2018 @ 1229:434m 25s 35m 7s
06 Aug 2018 @ 1154:36 min45s 1h 27m 16s
06 Aug 2018 @ 1027:20 min45s 57m
06 Aug 2018 @ 0930 A4d 15h 21m
01 Aug 2018 @ 18093m 55s 2h 4m
01 Aug 2018 @ 1604:234m 23s 4h 2m
01 Aug 2018 @ 1202 ie1d 5h 10m
31 Jul 2018 @ 0652 ie2d 12h 18m
28 Jul 2018 @ 1834 min1m 55s 2d 1h 16m
26 Jul 2018 @ 1717:133m 25s 42m 49s
26 Jul 2018 @ 1634:24 min30s 1h 39m 29s
26 Jul 2018 @ 1454:553m 57s 54m 32s
26 Jul 2018 @ 1400:23 min36s 1h 35m 10s
26 Jul 2018 @ 1225:133m 37s 45m

Interval Statistics

Interval Count100
Min35m
Max5d 15h 11m
Mean12h 46m
Median1h 33m

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
10029 04 Sep 2018 @ 1557 --- novakg Appeared to be in recovery after an eruption. I didn't go down the hill for a closer look.
9430 03 Aug 2018 @ 0820 --- WillBoekel light overflow
8846 22 Jun 2018 @ 1205 --- User34 First overflow about this time
8679 14 Jun 2018 @ 1614 --- cb false start or a minor. not sure what to call it. Nice explosive start with all vents playing and then it suddenly stopped. pool drained a few inches but recovered to overflow in 25m. I had to leave at 1645 and no eruption by that point
8182 13 May 2018 @ 1348 --- sfavor erupted sometime in the last hour
7725 20 Oct 2017 @ 1757 --- MAB Post eruptive 1757 - I don't usually put these in but thought I would since YVO isn't updating.
7720 17 Oct 2017 @ 0935 --- MAB seen refilling - 2nd day in a row I arrive 'missed it by that much'
5869 04 Sep 2017 @ 2045 --- novakg No eruption as of 2045. Full pool and no eruption heard while leaving the basin.
4592 31 Jul 2017 @ 1100 --- MAB YVO reset the clock in the Constant logger.
4764 31 Jul 2017 @ 1100 --- MAB 7/31/2017 YVO reset the Constant logger clock around 1100
3824 27 Oct 2016 @ 1345 27 Oct 2016 @ 1555 DanS No eruption, with pool overflowing for 2+ hours. High winds.
3603 05 Sep 2016 @ 1000 --- novakg I arrived at 0847 to a full pool. There was very little in way of activity. About 9:45 there was a bit of convection from Vent 3, but no eruption as of 1000.
2855 19 May 2016 @ 0950 --- MAB Since my last visit on May 13, the Green is gone, clearly visible from the museum. Closer inspection showed good refill action from rooster tail and the little vent on shore, no convection from main vent. YVO confirms one eruption, but the time stamp was so far off last fall I'd hold off on entering E times until we synch up the logger with a seen eruption. Let the games begin!!
2438 29 Sep 2015 @ 0953 --- Tara Overflow.
2359 15 Sep 2015 @ 0945 --- MAB Electronic eruption confirmed - no green in the runoff channel. Observations over the day showed action from the rooster tail vent and the little one on the east bank, but little to no convection from the main vent.
1587 14 May 2015 @ 0940 14 May 2015 @ 1400 MAB Convection in Whirligig looked the best I have seen so far this season. Last eruption March 6, pushing 70 days now.
1519 28 Feb 2015 @ 1442 28 Feb 2015 @ 1510 Kent Pool in overflow at 1442. Too much steam to see any surface disturbances. Good stream of water entering pool from up basin.
1487 02 Nov 2014 @ 0000 02 Nov 2014 @ 2359 MAB Both Constant and Whirligig have lots of water coming into them from above. Both were looking a little 'colloidal blue' in the centers of their craters since the heavy rains in late Sept. enlarged that twin runoff channel from near Pinwheel. 
1437 06 Oct 2014 @ 1740 06 Oct 2014 @ 1840 Jake 1740 to 1840, in overflow with frequent bubbling of the 2nd vent. another vent behind the main vent emitting streams of bubbles that persist to float around the surface
1181 01 Sep 2014 @ 0000 01 Sep 2014 @ 2359 MAB No eruption for 10 hours today, Sept 01. There is a large thermal soil "delta" in the pool similar to that seen in April-May (when Whirligig had been dormant Feb 06-May 23 2014), with water still draining into the geyser from upstream of Pinwheel.  The recent heavy rains may have played a part in this slowdown, and obviously the creation of the delta.  Convection and action from the vents looked better on my evening visit than they did in the morning.  Norris logbook/staff did not see an eruption yesterday, or a drained crater. YVO is currently offline so I offer this information until we know more.  
 
Addendum- this link may or may not work- but here's a photo for the record
https://www.facebook.com/photo.php?fbid=10202981247677529&set=gm.10152387537417399&type=1&theater
 
788 01 May 2013 @ 1159 --- steve At 1159 Whirligig had a rolling boil over the main vent but no splashing, the side vent did give one burst to about a foot and there was heavy overflow. No other action in the next 90 minutes
4730 01 Oct 2000 @ 1800 --- research-mab 10/01/2000 Whirligig remained full all day
4710 06 Jul 1990 @ 1800 --- research-mab 7/6/1990 Constant, Big Whirligig and Fireball all very active today.
4694 22 Jun 1988 @ 1800 --- research-mab 6/22/1988 No eruptions of Big Whirligig noted thus for this summer
4862 18 Aug 1985 @ 1800 --- research-mab 8/18/1985 Summary of Whirligig: From watching it on 8/18 & 8/19, etc. It has a near 2 hrs 30 mins interval (near-about). When it erupts – it erupts for about 3 to 4 minutes. The water in the back vent goes up to 4 or 5 feet at an angle in height and occasionally shoots it out 5 to 10 feet. The main vent in the pool center – shoots bursting water to 10 feet sometimes higher with the eruption making a sound like a helicopter/ locomotive. After it erupts it takes 1 ½ to 2 minutes for the pool to drain 2/3 of the way down where it stops & starts to refill again slowly. Then it takes 40 to 50 minutes about for the pool to fill slowly back up to overflowing. Taking 45 to 50 minutes from the start of the eruption- thru the eruption, draining of the pool, refilling of the pool to where it is (the pool) overflowing again. The rest of the time – near 1 hour & 40 minutes about the pool is filled w/water= till the eruption. The intervals between eruptions are near 2 ½ hours long. Big Whirligig and Splutterpot Geysers are directly connected. Both of the above usually go off at about the same time. Splutterpot Geyser then goes off & on real frequent during the time of Big Whirligig’s Eruption, then stops about 20 seconds after Big Whirligig not to erupt again for the next 10 to 12 minutes. Then Splutterpot continues its 5 to 6 minute interval till the next eruption. More on this later.
4858 18 Aug 1985 @ 1330 18 Aug 1985 @ 1350 research-mab 8/18/1985 No watching Splutterpot and Whirligig between 1100 to 1145 and 1330 to 1350
4856 18 Aug 1985 @ 1100 18 Aug 1985 @ 1145 research-mab 8/18/1985 No watching Splutterpot and Whirligig between 1100 to 1145 and 1330 to 1350
7623 11 Feb 1984 @ 1800 --- research-mab 02/11/1984 Whirligig Geyser – Dormant, overflowing quietly with small inflow from Constant Geyser. Orange & dark green algae present in basin.
4758 11 Jun 1982 @ 1200 --- research-mab 6/11/1982 Naturalist Orientation tour: Big Whirligig overflows, put, put put B. Whirlie – gen 3-10 min when active, interval 30-40 min to 1 hr Little Whirlie - like constant, sometimes every 30 sec, 20 min to 1 hr for series {BRACKET AROUND BOTH, ABOVE: Most years 1 is active, 1 dormant – apparently both dormant this year}
4617 26 Sep 1980 @ 1800 --- research-mab 9/26/1980 Little Whirligig Suspect Big and Little W are alternating eruptions.
4605 15 Sep 1980 @ 1000 --- research-mab 9/15/1980 Whirligig Geyser – became darker grey as the day progressed. Turbidity, at least in part, was due to run off entering Big Whirligig from Blue Geyser, via Constant. During a Big Whirligig eruption - the water did not clear indicating muddy water was coming from below or, all the water leaving Big Whirligig was that which had flowed into the system from Blue’s run off. I suspect the first case. Temp not ie at 10:14 165ºF, while ie at 1104 - 184ºF
4599 22 Aug 1980 @ 0000 --- research-mab 8/22/1980: Activity not observed out of Big Whirligig today. Little W active.
5081 22 Jun 1980 @ 1800 --- research-mab 06/22/1980 At the end of the (Little Whirligig) eruption Big Wirligig re-filled, but hasn’t been seen in eruption yet this year.
5131 01 Jun 1980 @ 1800 --- research-mab 06/01/1980 Big Whirligig – no evidence of recent eruptions, 144ºF
5070 04 Oct 1979 @ 1800 --- research-mab 10/04/1979 Whirligigs very quiet, dual eruptions seem to cause very long intervals.
5068 29 Sep 1979 @ 1800 --- research-mab 09/29/1979 Caught the Whirligigs in dual eruption again this afternoon. Big Whirligig was in eruption at 1642. At 1645:45 Little Whirligig joined with a continual splashing eruption. Big, feeling the affects of its competitor, grew in vigor, sending at least one burst 15 feet high. At 16:47:10, the Splutter Pot joined the confusion. Big Whirligig quieted down at 15:52:50 (7:05 in L.W.’s eruption) with only the rooster rail splashing afterwards. When Big quit, Little had a more typical individual bursting pattern. Little Whirligig ended at 16:55:20 for a duration of 9:35. It drained in 1:50. Big Whirligig quickly drained to 2 feet down in the vent. Africa was very quiet during the show, but grew in vigor as soon as Big Whirligig quit. As of 18:00 neither had erupted again.
4987 23 Sep 1979 @ 1105 --- research-mab 09/23/1979 Caught the Whirligigs in dual eruptions this morning. First time I’ve seen this occur. Big Whirligig started with a five minute lead, the Little Whirligig joined in at 1057. Little Whirligig was weak in the beginning and continuous. Then became more powerful as Big Whirligig grew to the strongest activity I have seen. Big quit and Little quickly followed suit, the whole show ending at 1102.
4988 22 Sep 1979 @ 1800 --- research-mab 09/22/1979 Little & Big Whirligig seem to be alternating eruptions nicely.
5058 12 Aug 1979 @ 1800 --- research-mab 08/12/1979 Big Whirligig stopped as Africa became powerful {no log time}
5028 10 Jul 1979 @ 1800 --- research-mab NOTE 07/10/1979 The wirligigs [sic] made a lier [sic] out of me today. Big wirligig [sic] erupted for 10 minutes instead of 3-4min. Little wirligig [sic] erupted for 10 minutes. This was shorter than previous times of 16 min. There was a 38 minute wait between Little wirligig’s [sic] eruption compared to last weeks wait of 6 minutes.
5334 24 Jul 1978 @ 1400 --- research-mab NOTE 07/24/1978 3:00 pm Walk – 1400 hrs. Geysers seen in eruption during hour: Little Whirligig ~ 1415 first observed since 7/4/78 Big Whirligig 2X Splutter Pot Primrose Sp. Constant 2x Dark cavern many times Africa Fireball Moxie Blue Iris Spring Porcelain Springs
4961 22 Jun 1978 @ 1800 --- research-mab 06/22/1978 It seems that when Little Whirligig is active for long periods Big really drains low, similar of course to what happens with Big W is the dominant geyser. So far this summer Big Whirligig has been the dominant geyser. It sill be interesting to see if the roles will switch like they did last summer.
5109 29 Jun 1977 @ 1025 29 Jun 1977 @ 1040 research-mab 06/29/1977 Between 1025 and 1040 Little Whirli, Big Whirli and Constant all erupted.
5100 30 May 1977 @ 1800 --- research-mab 05/30/1977 The Whirligigs are hard to figure. Sometimes Big Whirligig erupts for a long duration > 10 mins other times for only a couple of minutes. Sometimes there’s a comparatively long interval other times it’s more like like last year. Little Whirligig is similar, I’ve seen it several times a day and other times not at all. Still haven’t found a pattern to their activity.
5210 17 Sep 1976 @ 1800 --- research-mab 09/17/1976 Big Whirligig now has longer pauses between eruptions. It erupts for 1-3 minutes, stops for 30 sec – 1 min. Even the “tail” part of the eruption is no longer active between bursts.
5211 15 Sep 1976 @ 1800 --- research-mab 09/15/1976 Big Whirly still erupting constantly.
5212 13 Sep 1976 @ 1800 --- research-mab 09/13/1976 Big Whirly – apparently still erupting almost constantly
5231 11 Sep 1976 @ 1800 --- research-mab 09/11/1976 Big Whirly still going nearly constantly.
5233 10 Sep 1976 @ 1800 --- research-mab 09/10/1976 Big Whirly – still goin’ nearly constantly.
5241 07 Sep 1976 @ 1800 --- research-mab 09/07/1976 Big Whirly continues to nearly constantly erupt.
5247 03 Sep 1976 @ 1800 --- research-mab 09/03/1976 Big Whirly still active 3 min eruption - ½ min quiet – repeat. 162º in pool
5251 01 Sep 1976 @ 1800 --- research-mab 09/01/1976 Big Whirly may have been in nearly constant eruption for 24 hrs!
5318 31 Aug 1976 @ 1830 --- research-mab 08/31/1976 Big & Little Whirly & Constant are behaving as never before! Big Whirly has been erupting nearly constantly for 1½ hrs (since 1136). There are short pauses between eruptions, but the “tail” keeps going during the pauses. Little Whirly has been erupting along with B.W. It sometimes goes 7-10’ hi, but usually just splashes. Constant was erupting to heights of 50 feet (!!) & on three occasions B.W., L.W. & Constant were all erupting at once. Usually, B.W. would be erupting, Constant would shoot up 4 good bursts & L.W. would drain. Constant has been erupting every 15 min.
5292 31 Aug 1976 @ 1136 31 Aug 1976 @ 1815 research-mab 08/31/1976 Big Whirligig had been erupting nearly constantly for 5 hours. (Still erupting 1815)
5864 29 Jun 1976 @ 1800 --- research-mab 06/29/1976 {no times noted} Watched new geyser & Pinwheel for 25 min. At beginning of watch, new geyser was erupting about 1’ high & its eroded channel by the boardwalk was dry. Then it began pulsing higher & the channel filled with water. Pinwheel began emitting large bubbles from its vent & splashing as high as 2’ was seen. Big Whirligig began erupting after 5 minutes of this type of play.
5652 22 Aug 1975 @ 1800 --- research-mab 08/22/1975 Big Whirligig bubbling in several places not previously noticed, drains more after eruption.
5607 18 Jul 1975 @ 1800 --- research-mab 07/18/1975 Big Whirligig is now filling to overflowing before an eruption whereas before it would erupt prior to overflowing. Also there is a distinct pause between each bursts, not noticed before.
5600 05 Jul 1975 @ 1800 --- research-mab 07/05/1975 {post quakes} Whirlygig no time on length of eruption but it is more active with much more wash than normal.
5597 30 Jun 1975 @ 1800 --- research-mab 06/30/1975 Whirlygig is somewhat changed in color {post quakes}
5590 25 May 1975 @ 1800 --- research-mab 05/25/1975 {no time noted} Watched Big Whirligig go through one complete cycle. After erupting and partially draining it begins to fill. As it fills water comes into Little Whirligig until there is a pool about 8’ across. When Big Whirligig starts to erupt the water drains from L.W. Just as B.W. began. Constant gave one half-hearted burst. Will has to see if this pattern is typical or unusual.
5585 18 May 1975 @ 1800 --- research-mab 05/18/1975 Whirligigs- Big Whirligig erupts to 10’ every 15-30 minutes when pool fills. Have not yet seen Little Whirligig in action.
5855 20 Sep 1974 @ 1800 --- research-mab 09/20/1974 Big Whirligig erupting today
5853 18 Sep 1974 @ 1800 --- research-mab 09/18/1974 Big Whirligig would fill – would remain filled 15-20 min. L.W. would then begin erupting – after about 5 min B.W. would drain. L.W. would continue – B.W. was not observed in eruption all day.
5790 26 Aug 1974 @ 1800 --- research-mab 08/26/1974 B. W. - eruptions today are much more spectacular than usual.
5750 14 Aug 1974 @ 1800 --- research-mab 08/14/1974 Big Whirligig – Became muddier as the day progressed – L.W. was not seen in eruption today (at least in p.m.)
5754 14 Aug 1974 @ 1800 --- research-mab 08/14/1974 Big Whirligig water much clearer today
5743 30 Jul 1974 @ 1800 --- research-mab 07/30/1974 Whirligigs Water is milky blue, depositing pale gray sediment in LW crater and runoff. Water of Constant is clear.
5737 28 Jul 1974 @ 1800 --- research-mab 07/28/1974 BW & LW – Big has been very active today – only one observation of LW – very short eruption; appears that we may be losing Little W.
5723 08 Jul 1974 @ 1800 --- research-mab 07/08/1974 Whirligigs = same pattern as last 2 days, except LW seen erupting 1540 – finished 1602 (Big W dry)
5721 07 Jul 1974 @ 1800 --- research-mab 07/07/1974 Whirligigs – yesterday’s comments still apply this morning.
5712 18 Jun 1974 @ 2100 18 Jun 1974 @ 2130 research-mab 06/18/1974 2100 – Strolled on down this evening for a curiosity visit – L& B quiet. Then @ 2130 Big erupted & has been going at it for 15 min. Little W still quiet.
6195 30 Sep 1973 @ 1630 --- research-mab 09/30/1973 Porcelain Basin 4:30 pm Big W marker washed out (both markers)
6186 26 Sep 1973 @ 1500 --- research-mab 09/26/1973 Porcelain 3pm Little Whirligig draining frequently 1-2 hr. When Little W. drains, Big fills, but does not erupt, then when Little W. starts again, Big drains.
6171 20 Sep 1973 @ 1800 --- research-mab 09/20/1973 Ledge marker still in place 6:00 P.M.! ~~ all others in place incl BW
6173 20 Sep 1973 @ 1800 --- research-mab 09/20/1973 Big Whirligig markers still in place in the runoff channel; another marker was placed in the basin area. {no time noted}
6167 19 Sep 1973 @ 1700 --- research-mab 09/19/1973 Porcelain Basin 5pm – no change all markers in place including big whirligig!
6152 17 Sep 1973 @ 1745 --- research-mab 09/17/1973 All Porcelain Basin markers were in place at 5:45 pm except at Big Whirligig, there the marker placed in the basin was washed away, the marker in Big’s runoff was still in place thought runoff area was damp; it appeared that basin must have filled (not quite as full as before – perhaps a couple of inches short) and run over a bit but not with great force. Marker in basin replaced.
6145 16 Sep 1973 @ 1730 --- research-mab 09/16/1973 All Porcelain Basin markers in place at 5:30 pm including Big Whirligig’s ←- 1st day since its rejuvenation 9-6-73, that Big W’s basin has not filled & overflowed during the day.
6222 12 Sep 1973 @ 1745 --- research-mab 09/12/1973 1745 Big Whirligig quit erupting
6132 10 Sep 1973 @ 1545 --- research-mab 09/10/1973 3:45 Big W draining
6137 10 Sep 1973 @ 1030 --- research-mab 09/10/1973 Big W no H20 10:30
6129 09 Sep 1973 @ 1948 --- research-mab 09/09/1973 7:48 Big W. drained – Little continued.
6128 09 Sep 1973 @ 1937 --- research-mab 09/09/1973 7:37 Big W. began intermittent quiet periods
6126 09 Sep 1973 @ 0956 --- research-mab 09/09/1973 9:56 L Whirligig drained, Big W markers gone.
6123 08 Sep 1973 @ 1820 --- research-mab 09/08/1973 6:20 Little Whirligig noticed to be drained ~ marker gone from Big W (at least twice Big W has filled perhaps erupted)
6121 08 Sep 1973 @ 1652 --- research-mab 09/08/1973 4:52 Little Whirligig drained. Big’s marker gone -runoff into Big filled its vent a bit then it drained somewhat marker replaced
6117 07 Sep 1973 @ 0955 --- research-mab 09/07/1973 Both BW + LW stopped 9:55
6115 07 Sep 1973 @ 0945 --- research-mab 09/07/1973 Big W drained ~ 9:45
6240 06 Sep 1973 @ 2009 06 Sep 1973 @ 2031 research-mab 09/06/1973 8:09-8:31 Big W. fluctuated with eruptive activity then returned to the quiet pool stage for about 15 sec. Then resumed activity, toward the end of the eruption the active periods became shorter (beginning with sev. Min. down to ~15sec.)
6241 06 Sep 1973 @ 2011 --- research-mab 09/06/1973 8:11 Big W. increased size of pool and began to overflow; height of eruption went up to at least 10 ft. “Rooster tail” cont. activity except during the quiet pool stage.
6239 06 Sep 1973 @ 2009 --- research-mab 09/06/1973 8:09 Big W quieted for 1st time but did not drain.
6237 06 Sep 1973 @ 1845 --- research-mab 09/06/1973 6:45 marker placed in runoff channel of Big Whirligig – Little Whirligig still going.
6234 06 Sep 1973 @ 1825 --- research-mab 09/06/1973 6:25 Big Whirligig filling
6229 06 Sep 1973 @ 1800 --- research-mab 09/06/1973 6:00 big whirligig full (filling in 2min 15s)
6232 06 Sep 1973 @ 1727 --- research-mab 09/06/1973 5:27 Big Whirligig drained approx 2:15 sec much sand in vent
6238 06 Sep 1973 @ 1700 --- research-mab 09/06/1973 During first observed eruption it was seen that Big Whirligig had previously erupted (wave action pilling up sinter chips around the geyser)
5907 09 Mar 1973 @ 1800 --- research-mab 03/09/1973 Filling in (Big) Whirligig before eruption of L.W. is the same as last year.
6590 29 Jun 1970 @ 0830 --- research-mab 06/29/1970 0830 Big Whirligig Pool was almost full. Note: this the only mention of Big in this log-year
7508 11 Jun 1969 @ 1800 --- research-mab 06/11/1969 {general time} Little Whirligig frequently stops activity and drains down for 30 minutes. Water fills in Whirligig, then Little Whirligig resumes activity and the water drops out of Whirligig.
7395 22 Jun 1968 @ 0815 --- research-mab 06/22/1968 At 8:15, noticed Little Whirligig’s pool was dry and about two feet of standing water in the pool of Whirligig.
Baseline does not exist.


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