Recent Geyser Activity
Interval Between Eruptions 
Most recent data collected December 31, 2002
Compiled By Ralph Taylor
Activity for the most recent week
Geyser Start Date Last Update Intervals Min Mean Median Max Coef. Of Variation
Aurum 21-Sep-02 28-Sep-02 32 02:49 05:15 04:53 14:41 43.29%
Boardwalk 24-Dec-02 31-Dec-02 22 3:24 7:16 4:28 27:12 86.33%
Depression 20-Dec-02 27-Dec-02 23 06:36 07:26 07:36 08:08 5.94%
Lion (series) 23-Dec-02 30-Dec-02 22 04:20 07:39 07:03 11:06 23.10%
Little Cub 21-Sep-02 28-Sep-02 173 00:50 00:58 00:55 01:15 11.21%
North Goggles 24-Dec-02 31-Dec-02 2 13:14 76:37 76:37 140:00 116.99%
Plate 21-Sep-02 28-Sep-02 62 00:16 02:42 02:29 08:04 41.60%
Plume 13-Dec-02 20-Dec-02 2 02:30 03:10 03:10 03:50 29.77%
   
Artemisia 21-Sep-02 28-Sep-02 14 10:10 12:37 12:15 15:34 15.41%
Castle (w/o minors) 24-Dec-02 31-Dec-02 11 12:25 12:49 12:50 13:10 1.89%
Castle (minor-major) 24-Dec-02 31-Dec-02 2 03:30 04:17 04:17 05:05 26.09%
Castle (1st post minor) 24-Dec-02 31-Dec-02 2 13:00 13:17 13:17 13:35 3.10%
Daisy 24-Dec-02 31-Dec-02 77 01:54 02:12 02:10 02:40 6.99%
Grand 24-Dec-02 31-Dec-02 16 08:17 09:48 09:33 11:36 10.52%
Grotto 24-Dec-02 31-Dec-02 16 04:35 09:27 05:32 39:31 100.93%
Grotto (marathons) 24-Dec-02 31-Dec-02 4          
Oblong 24-Dec-02 31-Dec-02 31 04:03 05:32 05:10 10:04 24.68%
Old Faithful (all intervals) 24-Dec-02 31-Dec-02 111 00:56 01:30 01:32 01:48 10.05%
Old Faithful (Long) 24-Dec-02 31-Dec-02 467 01:16 01:33 01:33 01:51 6.51%
Old Faithful (Short) 24-Dec-02 31-Dec-02 17 00:55 01:04 01:06 01:11 7.27%
Pyramid 21-Sep-02 28-Sep-02 60 02:31 02:51 02:49 03:24 5.92%
Riverside 20-Dec-02 27-Dec-02 28 05:44 06:08 06:16 06:32 4.90%
   
Echinus 22-Sep-02 29-Sep-02 63 02:04 02:41 02:37 05:30 18.77%
   
Bead Geyser 20-Sep-02 27-Sep-02 327 00:26 00:30 00:30 00:38 7.55%
Fountain Geyser 24-Dec-02 31-Dec-02 32 03:18 05:14 05:23 06:36 12.89%
Great Fountain 24-Dec-02 31-Dec-02 13 10:55 13:04 12:25 16:55 13.89%
Pink Geyser 24-Dec-02 31-Dec-02 30 05:00 05:26 05:25 05:45 2.96%
   
Hillside 22-Sep-02 29-Sep-02 4 19:49 54:41 50:38 97:39 72.37%
Lone Pine 24-Dec-02 31-Dec-02 5 29:20 32:19 31:08 37:45 10.15%
Activity for the most recent month
Geyser Start Date Last Update Intervals Min Mean Median Max Coef. Of Variation
Aurum 28-Aug-02 28-Sep-02 142 02:35 05:13 04:50 14:41 36.99%
Boardwalk 30-Nov-02 31-Dec-02 60 01:04 13:53 4:48 330:33 326.29%
Depression 26-Nov-02 27-Dec-02 101 06:12 07:09 07:00 11:08 9.74%
Lion (series) 29-Nov-02 30-Dec-02 89 04:08 08:07 07:34 17:38 28.81%
Little Cub 28-Aug-02 28-Sep-02 784 00:50 00:56 00:55 01:19 9.69%
North Goggles 3-Sep-02 31-Dec-02 37 00:39 34:36 22:10 188:28 120.08%
Plate 28-Aug-02 28-Sep-02 288 00:16 02:35 02:29 08:04 24.18%
Plume 19-Nov-02 20-Dec-02 706 00:33 00:47 00:44 03:50 31.65%
   
Artemisia 28-Aug-02 28-Sep-02 64 08:29 11:36 11:24 15:34 15.21%
Castle (w/o minors) 30-Nov-02 31-Dec-02 43 11:55 12:50 12:50 13:35 2.01%
Castle (minor-major) 30-Nov-02 31-Dec-02 11 03:10 06:03 05:00 10:40 41.87%
Castle (1st post minor) 30-Nov-02 31-Dec-02 10 13:00 13:39 13:42 13:55 2.11%
Daisy 30-Nov-02 31-Dec-02 353 01:48 02:06 02:08 02:40 7.96%
Grand 30-Nov-02 31-Dec-02 75 06:47 09:46 09:37 12:27 11.77%
Grotto 30-Nov-02 31-Dec-02 73 04:35 10:00 05:58 39:31 85.77%
Grotto (marathons) 30-Nov-02 31-Dec-02 14          
Oblong 30-Nov-02 31-Dec-02 143 03:08 05:14 05:04 17:55 30.21%
Old Faithful (all intervals) 30-Nov-02 31-Dec-02 484 00:55 01:32 01:33 01:51 0.56%
Old Faithful (Long) 30-Nov-02 31-Dec-02 4071 01:16 01:34 01:34 02:05 6.99%
Old Faithful (Short) 30-Nov-02 31-Dec-02 194 00:52 01:05 01:05 01:15 8.02%
Pyramid 28-Aug-02 28-Sep-02 256 02:31 02:54 02:50 04:37 9.13%
Riverside 27-Nov-02 27-Dec-02 116 05:16 06:14 06:20 06:36 4.09%
   
Echinus 30-Aug-02 29-Sep-02 275 01:56 02:42 02:36 06:03 19.10%
   
Bead Geyser 13-Sep-02 27-Sep-02 650 00:26 00:30 00:30 00:39 7.34%
Fountain Geyser 30-Nov-02 31-Dec-02 140 03:05 05:19 05:26 07:18 14.81%
Great Fountain 30-Nov-02 31-Dec-02 47 04:15 12:27 12:25 16:55 17.42%
Pink Geyser 14-Sep-02 31-Dec-02 134 05:00 05:30 05:30 05:50 2.82%
   
Hillside 29-Aug-02 29-Sep-02 14 19:49 54:16 50:15 97:39 40.38%
Lone Pine 30-Nov-02 31-Dec-02 26 19:37 28:29 27:52 41:55 17.38%
All electronically recorded activity for 2002
Geyser Start Date Last Update Intervals Min Mean Median Max Coef. Of Variation
Aurum 24-Jun-02 28-Sep-02 403 02:35 05:42 05:19 15:38 37.10%
Boardwalk 27-Jun-02 31-Dec-02 179 00:44 25:10 18:05 330:33 131.37%
Depression 26-Jun-02 27-Dec-02 550 05:48 08:03 07:58 15:16 13.81%
Lion (series) 26-Jun-02 30-Dec-02 517 03:04 08:29 08:15 17:38 24.96%
Little Cub 25-Jun-02 28-Sep-02 2440 00:49 00:55 00:54 01:19 8.55%
North Goggles 3-Sep-02 31-Dec-02 52 00:39 28:45 15:10 188:28 131.40%
Plate 25-Jun-02 28-Sep-02 883 00:15 02:34 02:31 08:04 22.43%
Plume 28-May-02 20-Dec-02 6683 00:27 00:42 00:42 03:50 14.89%
   
Artemisia 1-Jan-02 28-Sep-02 448 06:12 12:33 11:55 29:00 28.10%
Castle (w/o minors) 16-Jan-02 31-Dec-02 445 11:41 12:30 12:24 19:20 4.41%
Castle (minor-major) 16-Jan-02 31-Dec-02 119 00:50 06:10 05:25 21:35 48.15%
Castle (1st post minor) 16-Jan-02 31-Dec-02 107 12:32 13:35 13:25 18:54 5.60%
Daisy 1-Jan-02 31-Dec-02 3430 01:28 02:20 02:18 05:56 15.72%
Grand 2-Jan-02 31-Dec-02 883 06:00 09:46 10:00 13:53 18.46%
Grotto 31-Dec-01 31-Dec-02 882 03:40 09:55 06:25 39:31 74.47%
Grotto (marathons) 31-Dec-01 31-Dec-02 179          
Oblong 25-Jun-02 31-Dec-02 774 02:43 05:53 05:41 17:55 25.55%
Old Faithful (all intervals) 1-Jan-02 31-Dec-02 4265 00:52 01:32 01:33 02:05 9.57%
Old Faithful (Long) 1-Jan-02 31-Dec-02 4071 01:16 01:34 01:34 02:05 6.99%
Old Faithful (Short) 1-Jan-02 31-Dec-02 194 00:52 01:05 01:05 01:15 8.02%
Pyramid 25-Jun-02 28-Sep-02 727 02:31 02:54 02:51 04:37 8.62%
Riverside 29-May-02 27-Dec-02 580 05:16 06:23 06:26 06:54 4.02%
     
Echinus 9-Jul-02 29-Sep-02 738 01:48 02:39 02:34 07:25 18.19%
   
Bead Geyser 13-Sep-02 27-Sep-02 650 00:26 00:30 00:30 00:39 7.34%
Fountain Geyser 1-Jan-02 31-Dec-02 1707 00:17 05:07 05:11 09:29 24.15%
Great Fountain 1-Jan-02 31-Dec-02 643 04:15 12:32 12:20 20:39 12.87%
Pink Geyser 14-Sep-02 31-Dec-02 471 05:00 05:33 05:35 06:00 3.13%
   
Hillside 3-Jan-02 29-Sep-02 81 19:49 64:26 47:13 232:20 72.37%
Lone Pine 1-Jan-02 31-Dec-02 192 14:33 18:31 18:22 26:50 9.59%