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08-17-11 The geyser activity summary and individual geyser graphs and data for some of the monitored geysers are updated as of 16 August (Geyser Hill) and 17 August (rest of UGB). Geyser information not updated yet includes Plate, Grotto, Riverside, Rift, West Triplet, Spouter, Mercury, Logbridge, Narcissus, and Pink geysers. Data is in hand for all of these except Grotto, where a logger failure caused loss of winter data. More updates should be coming soon.

08-14-11 The geyser activity summary and individual geyser graphs and data for some of the monitored geysers are updated as of 14 August (Fountain and Great Fountain) and 9 August (Geyser Hill) and 10 August (rest of UGB). Geyser information not updated yet includes Plate, Grotto, Riverside, Rift, West Triplet, Spouter, Mercury, Logbridge, Narcissus, and Pink geysers. Data is in hand for all of these except Grotto, where a logger failure caused loss of winter data. More updates should be coming soon.

07-20-11 The geyser activity summary and individual geyser graphs and data for some of the monitored geysers are updated. Geyser information not updated yet includes Depression, Little Cub, Plate, Castle, Grotto, Riverside, Rift, West Triplet, Spouter, Mercury, Logbridge, Narcissus, and Pink geysers. Data is in hand for all of these except Grotto, where a logger failure caused loss of winter data. More updates should be coming soon.

04-29-11 The geyser activity summary and individual geyser graphs and data for the rest of the UGB geysers (Old Faithful and Riverside) are updated. Rift, West Triplet, F&M, and the Firehole Lake Loop geysers will not be downloaded until June.

04-21-11 The geyser activity summary and individual geyser graphs and data for all of the monitored Geyser Hill features (Aurum, Beehive, Depression, Dome, Lion, Little Cub, Little Squirt, North Goggles, Plume, and Plate Geysers) are now updated as of downloads on 25 March. The Fountain Geyser analysis is also current as of 25 March, as are some of the UGB geysers (Artemisia, Castle, Daisy, Grand, and Oblong). There is no Grotto data for the winter of 2010-2011 due to a logger failure. Old Faithful and Riverside are still to be processed; Rift, West Triplet, F&M, and the Firehole Lake Loop geysers will not be downloaded until June.

01-07-11 The geyser activity summary and individual geyser graphs and data for several Geyser Hill features (Aurum, Depression, Dome, Lion, Little Cub, Little Squirt, North Goggles, and Plate Geyserd) are now updated as of downloads on 7 January.

Few winter downloads are planned for this winter (2010-11). We have more of the loggers that can run all winter without loss of data so the data will eventually be made available, but not all of the geyser data will be available during the winter.

11-27-10 The geyser activity summary and individual geyser graphs and data for Fountain Geyser and the UGB are now updated as of downloads during the week of 8 November. Fewer winter downloads are planned for this winter (2010-11). We have more of the loggers that can run all winter without loss of data so the data will eventually be made available, but not all of the geyser data will be available during the winter.

Geyser Hill data is updated; the other UGB geysers are also updated with the exception of Pyramid (no winter data), Rift, and West Triplet. The Rift and West Triplet data will not be available until June 2011.

10-31-10 The geyser activity summary and individual geyser graphs and data for the UGB are now updated as of downloads during the week of 22-27 September. Fewer winter downloads are planned for this winter (2010-11). We have more of the loggers that can run all winter without loss of data so the data will eventually be made available, but not all of the geyser data will be available during the winter.

09-18-10 The rest of the geyser activity summary and individual geyser graphs and data for the UGB are now updated as of the 15 September UGB downloads.

09-16-10 The geyser activity summary and individual geyser graphs and data for most of the UGB, LGB, and WTGB are updated as of the 12 September WTGB, 14 September LGB, and 15 September UGB downloads. The data for Grotto, Old Faithful, Oblong, Riverside, Rift, and West Triplet has not been updated yet; all of these updates except Old Faithful should be posted by Saturday evening.

The summary sheet is also updated.

09-09-10 The geyser activity summary and individual geyser graphs and data for all of the UGB, LGB, and WTGB are updated as of the 5 September WTGB, 7 September LGB, and 08 September UGB downloads. The summary sheet is also updated.

09-02-10 The geyser activity summary and individual geyser graphs and data for all of the UGB and LGB are updated as of the 31 August LGB and 01 September UGB downloads. WTGB data has not been collected this week. The summary sheet is also updated.

08-27-10 The geyser activity summary and individual geyser graphs and data for all of the UGB, LGB, and WTGB are updated as of the 27 August UGB; 23 August LGB/WTGB and Old Faithful; 22 August 2010 for Spouter Geyser in Black Sand Basin. The summary sheet is also updated.

08-24-10 The geyser activity summary and individual geyser graphs and data for the LGB and WTGB are updated as of the 23 August LGB/WTGB and Old Faithful; 22 August 2010 for Spouter Geyser in Black Sand Basin. My normal download day for the UGB is Wednesday, but the opening of the OFVEC has altered schedules around here so UGB data will be collected on 26 August and if all goes well posted on Friday 27 August. The summary sheet is not updated; I will try to do that on 25 August.

08-20-10 The geyser activity summary and individual geyser graphs and data are updated as of the 19 August UGB and 17 August 2010 LGB download. Fountain, Great Fountain, Logbridge, and Narcissus data is from 17 August. I have also uploaded logger data for Fan and Mortar.

08-18-10 The geyser activity summary and individual geyser graphs and data are updated as of the 11 August UGB and 17 August 2010 LGB download. Fountain, Great Fountain, Logbridge, and Narcissus data is from 17 August. I have also uploaded logger data for Fan and Mortar.

08-04-10 Added descriptions and graphs for Pyramid Geyser from 1996 to present.

08-03-10 Added descriptions and graphs for Logbridge Geyser in the White Creek group of the Lower Geyser Basin.

07-22-10 The geyser activity summary and individual geyser graphs and data are updated as of the 21 July 2010 download. All of the usual Upper Geyser Basin geyser data is up to date. Fountain, Great Fountain, and Narcissus data is from 20 July; the rest of the LGB is not computed yet for this year. I have also uploaded logger data for Fan and Mortar. Lone Pine data is from 13 July.

07-15-10 The geyser activity summary and individual geyser graphs and data are updated as of the 14 July 2010 download. All of the usual Upper Geyser Basin geyser data is up to date. Fountain, Great Fountain, and Narcissus data is from 13 July; the rest of the LGB is not computed yet for this year. I have also uploaded logger data for Fan and Mortar.

07-08-10 The geyser activity summary and individual geyser graphs and data are updated as of the 7 July 2010 download. All of the usual Upper Geyser Basin geyser data is up to date except Spouter. The Spouter logger has had problems; logging will resume soon but the May and June data will not be updated. Fountain and Great Fountain data is a few days old; the rest of the LGB is not computed yet for this year. I have also uploaded logger data for Fan and Mortar.

07-01-10 The geyser activity summary and individual geyser graphs and data are updated as of the 30 June 2010 download. All of the usual Upper Geyser Basin geyser data is up to date except for Daisy and Spouter (both a bit dated) The Spouter logger has had problems; logging will resume soon but the May and June data will not be updated. Fountain and Great Fountain data is a few days old; the rest of the LGB is not computed yet for this year. Lone Pine is a week old. I have also uploaded logger data for Fan and Mortar and Giant Geysers.

06-24-10 Updated geyser activity summary and individual geyser graphs and data as of the 23 June 2010 download. All of the usual Upper Geyser Basin geyser data is up to date except for Castle and Spouter (both a bit dated). Fountain is current; the rest of the LGB is either a week or so old (Great Fountain) or not computed yet for this year. Lone Pine is up to date. I have also uploaded logger data for Fan and Mortar and Giant Geysers.

05-09-10 Updated geyser activity summary and individual geyser graphs and data as of the 27 April 2010 download. The data for Artemisia since 2 December and January 2010 were lost due to a technical problem, and all data past that time was lost due to a second logger failure. The overwinter data for Grand Geyser and Riverside Geyser are now available.

04-28-10 Updated geyser activity summary and individual geyser graphs and data as of the 23 March 2010 download. The data for Artemisia between 2 December and January 2010 were lost due to a technical problem, and all data past that time was lost due to a second logger failure.

02-28-10 Updated geyser activity summary and individual geyser graphs and data as of the 13-14 February 2010 download. Old Faithful, Fountain, Grand, and Riverside loggers were not downloaded; the data for Artemisia between 2 December and January 2010 were lost due to a technical problem.

02-11-10 Updated geyser activity summary and individual geyser graphs and data as of the 13 January 2010 download. Old Faithful, Fountain, and Spouter data is a bit newer. Only the Upper Geyser Basin geysers and Fountain Geyser were downloaded; the rest of the data may not be available until next spring. The loggers on Grand and Riverside were not downloaded; the data for Artemisia between 2 December and January 2010 were lost due to a technical problem.

01-08-10 Updated geyser activity summary and individual geyser graphs and data as of the 2 December 2009 download. Only the Upper Geyser Basin geysers were downloaded; the rest of the data may not be available until next spring. Data for Fountain Geyser, Riverside Geyser, and Artemisia Geyser were either lost or misplaced; at any rate, I did not receive them.

11-13-09 Updated geyser activity summary and individual geyser graphs and data as of the 3 November download. Only the Upper Geyser Basin geysers and Fountain Geyser were downloaded; the rest of the data may not be available until next spring.

10-28-09 Updated all of the electronic logger data as of the late September (26-28) downloads.

10-12-09 Updated OFVC log for 2009 through October 11.

10-01-09 Updated OFVC log for 2009 through 30 September.

9-16-09 Updated most data as of the latest download. I have not finished updates yet--Spouter and West Triplet are not updated. The geyser statistics are updated.

9-13-09 Updated most data as of the latest download. I have not finished updates yet--Spouter and West Triplet are not updated. The geyser statistics are updated.

8-31-09 Updated all data as of the latest download. The geyser statistics are updated.

8-24-09 Updated all data as of the latest download. The geyser statistics are updated.

8-17-09 Updated all data as of the latest download. The geyser statistics are updated.

8-10-09 Updated all data as of the latest download. The geyser statistics are updated.

8-03-09 Updated all data as of the latest download. Analysis is not done yet on Mercury geyser. The logger for Pyramid Geyser has been deployed but no data is available yet. The geyser statistics are updated.

7-14-09 Updated all data as of the latest download. Analysis is not done yet on Logbridge and Mercury geysers. The logger for Occasional has been deployed but no data yet. The geyser statistics are updated. The downloads on 9-14 July will be the last downloads until 3 August, although the Logbridge Geyser and Mercury Geyser analysis should be posted during the next two weeks.

7-08-09 Updated all data. Analysis is not done yet on Logbridge and Mercury geysers. The logger for Occasional has been deployed but no data yet. The geyser statistics are updated. Note that several of the geyser statistics summaries have a graph of the previous month's activity added.

7-02-09 Updated all data except West Triplet. Analysis is not done yet on Lone Pine, Logbridge, Mercury geysers. The logger for Occasional has been deployed but no data yet.

6-24-09 Updated Artemisia, Grand, Daisy, Aurum, Beehive, Depression, Lion, Little Squirt, Oblong, and Riverside. The summary has not been updated.

6-21-09 Updated Great Fountain Geyser and Fountain Geyser through 20 June. The summary has not been updated.

6-20-09 Updated Artemisia Geyser through 29 May and Castle Geyser through 20 June. The summary has not been updated.

5-05-09 Updated geyser data for winter results as of 22 April downloads. See the 2009 summary to see which geysers were updated.

3-09-09 Updated geyser data for winter results as of 10 February downloads. See the 2009 summary to see which geysers were updated.

2-26-09 Updated geyser data for winter results as of 11 January downloads. See the 2009 summary to see which geysers were updated.

9-24-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill as of the download on Tuesday 23 September. Also updated Fountain, Great Fountain, Logbridge, Narcissus, Pink, and Mercury Geysers as of the download on Monday 21 September. This will be the last update for the Upper, Midway, and Lower Geyser Basin geysers for the summer; the next data update will occur in November at the earliest. Data for Lone Pine and Occasional Geysers should be updated later this week.

9-16-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill as of the download on Tuesday 16 September. Also updated Fountain, Great Fountain, Logbridge, Narcissus, Pink, and Mercury Geysers as of the download on Monday 15 September.

9-10-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill as of the download on Tuesday 9 September. Also updated Fountain, Great Fountain, Logbridge, Narcissus, Pink, and Mercury Geysers as of the download on Tuesday 9 September.

9-03-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill as of the download on Tuesday 2 September. Also updated Fountain, Great Fountain, and Logbridge, Narcissus, Pink, and Mercury Geysers as of the download on Sunday 31 August.

8-27-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill as of the download on Tuesday 26 August. Also updated Fountain, Great Fountain, and Logbridge, Pink, and Mercury Geysers as of the download on Monday 25 August.

8-20-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill as of the download on Tuesday 19 August. Also updated Fountain, Great Fountain, and Logbridge, Pink, and Lone Pine Geysers as of the download on Monday 18 August.

8-13-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill as of the download on Tuesday 12 August. Also updated Fountain, Great Fountain, and Logbridge, Pink, and Lone Pine Geysers as of the download on Monday 11 August.

8-06-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill as of the download on Tuesday 5 August. Also updated Fountain, Great Fountain, and Logbridge Geysers as of the download on Monday 04 August. Pink Geyser and Lone Pine Geyser updates coming soon, then Occasional Geyser.

7-17-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill as of the download on Tuesday 15 July. Also updated Fountain, Great Fountain, Pink, and Logbridge Geysers as of the download on Sunday 13 July. Grotto, Spouter, and Pyramid data has not been updated yet. There will be no more geyser data downloads until 6 August.

7-09-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill and Black Sand Basin as of the download on Tuesday 9 July.

7-06-08 Updated Fountain, Great Fountain, Pink, and Logbridge Geysers to the 6 July download data. Also updated Lone Pine Geyser as of 3 July.

7-01-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill and Black Sand Basin as of the download on Tuesday 1 July. Also updated Fountain and Great Fountain to the 29 June download data. The geyser statistics sheet and web page are also updated.

6-25-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill and Black Sand Basin as of the download on Tuesday 17 June. Also updated Fountain and Great Fountain to the 20 June download data. The geyser statistics sheet and web page are also updated.

6-18-08 Updated all Upper Geyser Basin data and graphs including Geyser Hill and Black Sand Basin as of the download on Tuesday 17 June.

6-15-08 Updated Rift, Plate, Riverside, and West Triplet graphs and data. The next download is Tuesday 17 June.

6-12-08 Updated Fountain and Old Faithful graphs and data for 2008 through June 12. A partial summary is also posted

6-11-08 Updated Artemisia, Aurum, Beehive, Castle, Daisy, Depression, Grand, Grotto, Lion, Little Cub, Little Squirt, Oblong, and Plume graphs and data for 2008 through June 10. Summaries should be posted tomorrow.

6-08-08 Updated Aurum, Castle, Daisy, Grand, Grotto, and Great Fountain graphs and data for 2008 through May 24.

6-06-08 Updated Little Squirt and Beehive graphs and data for 2008 through May 24.

6-05-08 Updated Spouter and Artemisia graphs and data for 2008 through May 24.

5-13-08 Added Spouter graphs and data for 2008 through April 9.

5-10-08 Updated Little Cub and Oblong data for 2008 through April 9.

5-09-08 Added Fountain, Grotto, and Lion data for 2008 through April 9.

5-02-08 Added Little Squirt and Grand data for 2008 and updated Beehive and Little Squirt through April 9.

4-30-08 Added electronic data for Fountain and added 2008 graphs for Aurum, Artemisia, Beehive, Castle, Daisy, and Depression Geysers.

Unusual behavior at Steamboat geyser - 2-21-2007 a report by Hank Heasler and Cheryl Jaworowski

New pictures and content are being added weekly since 01/01/07

The electronic statistics and information are updated being updated weekly since 07-01-2006

5-31-06 Added quick links from Recent Geyser Activity

5-31-06 Added electronic data for Little Squirt

Right now, the whole site is new.  However, we still have a lot to add!  We are going to continue adding new information, photos, videos, and links.  We're going to improve the navigation of the site, and add some whole new sections.

Please keep checking back!



Please note - this site is currently under constuction. Please visit for more information.  Last update 01-29-2017

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