The day started out as expected: Grotto still erupting along with a several hour wait at Grand. But just before the Grand eruption, I noticed that the steam cloud at Grotto had suddenly ceased. Scott Bryan confirmed that Grotto was off, giving us a fourteen hour duration, and a Giant window opening sometime in early afternoon.
The rest of the morning was spent in trying to catch up on a little of the sleep I hadn't gotten the last few nights. Then it was out into the basin to see what would happen next. I figured the Bijou Cage was near capacity, so no reason not to wait at Grand, even though it was well before time for an eruption. One indication of just how full the cage probably was was when I saw an eruptions of Aurum and that weren't announced on the radio about an hour earlier. On the way out, ran into Lynn Stephens at Castle.
Since I was in time killing mode, we were talking there for quite a bit when Lynn suddenly goes, "Beehive!" Sure enough, there it was, climbing to full height, and once again without an indicator. You could almost tell by the radio reaction that there were a lot of people who once again were thinking of how they'd heard of another Beehive eruption while at Giant.
Beehive was nearing the end when Scott announced the rise in water in Mastiff. Now this was a bit of a disappointment, as we were only a little over six hours since Grotto quit, and the last time there was a quick hot period/recovery, it lead to a weak hot period and nothing much. But not this time. Lynn and I both got on the bikes and headed down that way. Within two minutes, at 14:01, the hot period had started with several vents starting. By the time I was in sight of the platform it was apparent that Mastiff was in charge, with nice boiling visible even at a distance.
Mastiff Geyser 2007 Jun 20 14:10
I'd decided that for this eruption, I was going to try to get a height measurement at the start of the eruption, and for that I had to walk past the platform and on south to the markers. I got into position at the 200ft markers just about the time Scott announced four minutes and Mastiff going flat but overflowing. This was normal, but the key was for Mastiff to come back, quickly and even stronger, which it did. I also noticed that at the 200ft mark, Mastiff was obscured by Giant's back shoulder, so quickly retreated to the 300ft marker instead. By 14:10, Mastiff was obviously in eruption.
Giant Geyser 2007 Jun 20 14:12 Start Sequence
After two consecutive nighttime eruptions, and two more under less than ideal conditions
(although 31 May was more than acceptable), it was wonderful to be perfectly positioned to see a start on a warm afternoon. I quickly took the sequence of photos here, then used my clinometer to get a reading on the height. I was disappointed to get only 60%, which comes to 180ft. But as the photo sequence shows, this just didn't seem like a huge, high start.
(My camera is an ancient, ten-year old Kodak DC-50 first generation digital camera. It takes up to 7 seconds to process and store an image, so that sequence is at least 30 seconds long.)
I noticed that the northern corner of the cage got soaked nicely, and took pictures of the resting places for the marker signs. After that, it was enjoy the spectacle time.
Shortly after the start it was announced that Castle was erupting, as if anybody cared. I assume by an NPS naturalist on rove, as unless they were lucky enough to be stuck in an NPS staff meeting, every gazer seemed to be at their chosen spot in sight of Giant.
Grand kept up the tradition of being difficult in erupting after Giant. The two nighttime eruptions of Giant I saw featured Grand erupting within ten minutes or so (at least from the steam clouds I saw.) For this one, like the early morning eruption in May, Grand erupted while I was tying down my bike at Castle, denying me the enjoyment of waiting for Grand while watching the waning Giant activity.
Now the pressure is really on. I figure I've got one more chance at a Giant eruption, next week before I leave, and can't leave with a five out of six record.