<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="country-region"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"/>  <style>  </style>  </head> <body lang=EN-US link=blue vlink=purple> <div class=Section1> I had my first overnight ‘Giant watch’ leading to the eruption on the 24th.  With Michael Goldberg’s observations from 22/23 May and mine from 23/24 we have a fairly complete record of the hot periods at Giant for a couple of days and there were a whole lot of them!  So here for the record is the information from my logbook.<o:p></o:p> <o:p> </o:p> Tuesday May 22<o:p></o:p> 0445ie Grotto (marathon), end 0800-0900<o:p></o:p> 1433 Marathon recovery GHP, d~5m, Mastiff 1-2’, <st1:place w:st="on"><st1:country-region w:st="on">India</st1:country-region></st1:place> 50% wet<o:p></o:p> 1713 GHP d~6m, Mastiff 1-3’<o:p></o:p> 1929 GHP d=5m50s, Mastiff 1-3’, some vertical surging in Giant to the bite<o:p></o:p> 2033 Pause<o:p></o:p> 2046 GHP d=2m52s<o:p></o:p> At this point I left for some sleep.  Bijou wasn’t on strong and Mastiff was not depth charging.  Maybe Mike can fill in any gaps in data before I returned ~0400 on the 23rd.<o:p></o:p> 2300 Grotto Fountain, no Grotto (Mike)<o:p></o:p> <o:p> </o:p> Wednesday May 23<o:p></o:p> ~0100 Bathtub (Mike)<o:p></o:p> 0152 Bathtub, Mastiff depth charging and strong Bijou jetting started here and continued until Giant erupted (Mike)<o:p></o:p> 0347 GHP d=2 (Mike)<o:p></o:p> 0446 GHP d=2m12s<o:p></o:p> 0458ie Grotto Fountain<o:p></o:p> 0504 Grotto d=35m, first Grotto after the marathon, Grotto was off for over 20 hours.<o:p></o:p> 0534 Bathtub<o:p></o:p> 0628 GHP d=4m40s<o:p></o:p> 0727 GHP d=1m40s<o:p></o:p> 0827 Pause<o:p></o:p> 0840 Pause<o:p></o:p> 0857 GHP d=4m, vent next to Catfish splashed after hot period (it did this after quite a few hot periods during the day)<o:p></o:p> 0907 Grotto Fountain<o:p></o:p> 0912 Grotto d~1h<o:p></o:p> 0958 GHP d=2m10s<o:p></o:p> 1106 GHP d~4m, Bijou went into steam<o:p></o:p> 1201 GHP d~1m30s<o:p></o:p> 1257 Bathtub<o:p></o:p> 1343 Pause<o:p></o:p> 1350ns Grotto Fountain<o:p></o:p> 1353 Grotto<o:p></o:p> 1401 Slowdown<o:p></o:p> 1416 GHP d=6m25s, Mastiff 1-2’, Cave boiled round the rim, Feather tried to restart, this was the only ‘good’ hot period of the day<o:p></o:p> At this point I took a food break so Giant may have had a hot period before the next one listed although the platform was dry when I returned.<o:p></o:p> 1628 GHP d~1m30s<o:p></o:p> 1720 Pause<o:p></o:p> 1737 GHP d~3m30s<o:p></o:p> 1835 GHP d=2m10s<o:p></o:p> 1935 GHP d=1m45s<o:p></o:p> 2039 GHP d~5 Bijou roaring but not much Mastiff overflow<o:p></o:p> Another food break so maybe a missed GHP.<o:p></o:p> 2233 GHP d~4m<o:p></o:p> 2241ie Grotto Fountain<o:p></o:p> 2241 Grotto d~90m<o:p></o:p> 2326 GHP d<1m30s<o:p></o:p> <o:p> </o:p> Thursday May 24th<o:p></o:p> 0021 GHP d~4m<o:p></o:p> 0117 GHP d=1m20s<o:p></o:p> 0226 GHP d~4m but weak, no FS<o:p></o:p> 0324 GHP d=1m40s<o:p></o:p> 0352ie Grotto Fountain<o:p></o:p> 0353 Grotto (still i.e. during Giants eruption)<o:p></o:p> 0424 GHP d=1m20s<o:p></o:p> 0522 GHP d=7m20s, <st1:country-region w:st="on"><st1:place w:st="on">India</st1:place></st1:country-region> not flooded until Feather restarted and Giant started to surge…<o:p></o:p> 0532 Giant d-95m<o:p></o:p> <o:p> </o:p> It is possible there were more pauses because I took excursions to Grand and the bathroom in between hot periods but given how strong Bijou was and the regularity of the hot periods I don’t think any were missed (except for during the longer breaks noted in the text).  Bijou was easy to watch overnight given how strong it was.  In a matter of seconds it would go from vigorous to ‘off’.  No need to guess if it was paused or not except for the one time it did a slowdown.<o:p></o:p> <o:p> </o:p> Most hot periods with d>3m had Feather Satellite active and shorter ones did not.  A couple of d~4m hot periods were weak and didn’t get Feather Satellite.<o:p></o:p> <o:p> </o:p> So like last year, weirdness at Grotto and hourly hot periods lead to a Giant eruption.  Added to that was the strong Bijou eruption and Mastiff depth charging for over 24 hours.<o:p></o:p> <o:p> </o:p> Go Giant!<o:p></o:p> <o:p> </o:p> Graham Meech<o:p></o:p> <o:p> </o:p> <o:p> </o:p> </div> </body> </html>