Reticulating splines. . .
| Geyser: | Echinus |
| Date/Time: | 1973-04-18 @ 1600 |
| Entrant: | research-mab |
| Observer: | 1973 log -Rick H |
| Time Entered: | 2017-09-09 13:04:13 |
| Time Uploaded: | 2017-10-02 14:45:06 |
| Submitted to: | Geysertimes.org |
| Note: | 04/18/1973 Echinus – a big change was observed today: the water is now a very turbid gray (with a slight tinge of blue) In fact, when the pool is drained after an eruption, the water is almost opaque. In the runoff channels much fine-grained gray sand has been deposited. The change has also had an effect on Echinus’s eruptive behavior. In the 5 eruptions observed this afternoon all of them went off without recycling, started before the pool was completely full, i.e. before the dome-shaped rock on the north side was covered, had a shorter interval, and played for longer durations. An account of its activity is as follows: 1240 eruption began. There was virtually no boiling over vent (less than 10 seconds) before play began at a level approximately 2 inches below the dome-shaped rock. Estimated maximum height was near 70 feet. Duration: 3m45s Next eruption: rapid boiling began when the pool water level was a full 4 inches below the top of the dome-shaped rock at 1:20 pm. Pool became calm at 1:24 pm but still filling. Bubbling started approximately 10 seconds before beginning of the eruption when still 2 inches of the dome-rock were exposed. Eruption began at 1328 Measured maximum height 52 feet Duration: 3m46s Interval from previous eruption: 48 min Next eruption: as before, bubbling started when pool level was still 4 inches below dome rock at 2:09 pm Pool quiet at 2:11, gentle bubbling at 2:12 Vigorous bubbling started 7 seconds before beginning of eruption when about 2 inches of the dome rock were exposed. Eruption began at 2:17 Measured maximum height: 85 feet Duration: 3m45s Interval: 49 minutes Next eruption: much the same as before in the 2:17 eruption. Bubbling started 7 seconds before time of play when approximately 1 ½ inches below top of dome rock. Activity was witnessed by 18 visitors! Eruption: 3:06 pm Measured maximum height: 93 feet Duration: 3m50s Interval 49 minutes Next eruption: same as before except pool level rose to 1 inch below top of dome rock before playing and that bubbling preceded eruption by 13 seconds. Eruption: 3:55 pm Measured maximum height 76 feet Duration 3m41s Interval 49 minutes |