Profile

• Organization

  U.S. Geological Survey

  
  
• Website

  (not set)

  
  
• ORCID

  (not set)

  
  
• Interests

  1. volcanic hazards

  
  
• Address

  (not set)

  
  
• Biography

  Emeritus scientist in volcanic hazards, probability of volcanic eruptions, chemistry of springs on volcanoes, and volumes of tephra eruptions