Dear customers, please be informed that our shopping cart will be unavailable between August 21 and September 1, 2014, as we will be making some changes to serve you better. To minimise any possible delivery disruption, we encourage you to make your purchases before August 21. We appreciate your understanding and apologise for any inconvenience.

Wiley
Wiley.com
Journal

Journal of Geophysical Research: Solid Earth

More Press Releases related to this journal
Vol 119 (12 Issues in 2014)
Print ISSN: 2169-9313 Online ISSN: 2169-9356
Published on behalf of American Geophysical Union
Impact Factor: 3.174

More Press Releases in:

Earth Science


May 06, 2014

Yellowstone Geyser Eruptions Influenced More by Internal Processes, Than by External Forcing

The intervals between geyser eruptions depend on a delicate balance of underground factors, such as heat and water supply, and interactions with surrounding geysers. Some geysers are highly predictable, with intervals between eruptions (IBEs) varying only slightly. The predictability of these geysers offer earth scientists a unique opportunity to investigate what may influence their eruptive activity, and to apply that information to rare and unpredictable types of eruptions, such as those from volcanoes.

Dr. Shaul Hurwitz took advantage of a decade of eruption - spanning from 2001 to 2011 - for two of Yellowstone’s most predictable geysers, the cone geyser Old Faithful and the pool geyser, Daisy.

Dr. Hurwitz's team focused their statistical analysis on possible correlations between the geysers' IBEs and external forces such as weather, earth tides and earthquakes. The authors found no link between weather and Old Faithful's IBEs, but they did find that Daisy's IBEs correlated with cold temperatures and high winds. In addition, Daisy's IBEs were significantly shortened following the 7.9 magnitude earthquake that hit Alaska in 2002.

The authors note that atmospheric processes exert a relatively small but statistically significant influence on pool geysers’ IBEs by modulating heat transfer rates from the pool to the atmosphere. Overall, internal processes and interactions with surrounding geysers dominate IBEs’ variability, especially in cone geysers.