<html> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <meta name=Generator content="Microsoft Word 10 (filtered)"> <style>  </style> </head> <body lang=EN-US link=blue vlink=purple> <div class=Section1> Giant Geyser erupted at 0239 on Sunday, July 30th. The eruption is the 4th this month and took place about 10 hours after the conclusion of a 24 hour marathon eruption of Grotto Geyser. The interval was just over 6 ½ days.   The hot period started at 0227 with Mastiff quickly reaching overflow and surging from 2-4 feet. At the 3 minute mark, “India” was under an inch of water. All the normal vents were erupting in front of Giant (Feather, Feather’s Satellite, Rust, and 3 “Southwest” Vents). About 5 minutes into the hot period, Mastiff stopped surging but continued to overflow heavily. Around the 7 minute mark, Mastiff began surging 3-6 feet, by the 8 minute mark it was surging up to 8 feet, and at the 9 minute mark it was as tall as Giant’s cone. If Cave and Turtle were doing anything, it wasn’t noted as we were all watching Mastiff. Mastiff began erupting at 0229, with the front vent quickly reaching 30-40 feet. Within 30 seconds the back vent of Mastiff was also in eruption. About a minute into Mastiff, the back vent started jetting as high as 60 feet. With this, Bijou entered a loud, roaring steam phase. Giant started at 0239 and completely drenched the viewing platform. The eruption was sharply angled towards it. Paul Strasser, who was in the area of the “GIP” when Giant started, felt this eruption was as big as the one last week. Catfish started at 0241 and was easily 20-30 feet high.   MK </div> </body> </html>