Magma under Long Valley Caldera



Concerning the Long Valley Meeting Report (Eos, January 19, 1988, p. 43), in the section describing the presentation of results from the teleseismic imaging experiment, it is stated that “…subsequent questions by meeting attendees brought out the idea that the [low-velocity] anomaly [beneath the caldera] could also be heavily influenced by fractured and hydrothermally altered rocks to depths of 4 – 5 km.” For several reasons, we think that this comment is a significant misrepresentation of facts.