VOLCANIC TREMOR AND ITS USE IN ESTIMATING ERUPTION PARAMETERS

This study investigates tremor, the continuous seismic signal that accompanies virtually all volcanic eruptions, for 50 eruptions from 31 volcanoes. A number of new trends are noticed when reduced displacement (a normalized amplitude measure) is plotted against the Volcanic Explosivity Index (ash plume height). (1) Large eruptions generate stronger tremor than small ones. (2) Fissure eruptions generate stronger tremor than circular vents for the same fountain height. (3) Eruptions with higher gas content produce stronger tremor than those with low gas content. (4) Phreatic eruptions produce stronger tremor than magmatic eruptions for the same Volcanic Explosivity Index.

• Corporate Authors:

  Federal Coordinator, Meteorological Services & Support Research

  8455 Colesville Road, Suite 1500
  Silver Spring, MD  United States  20901
• Authors:
  • McNutt, S R
• Conference:
  • 2nd International Conference on Volcanic Ash and Aviation Safety
  • Location: Alexandria, Virginia
  • Date: 2004-6-21 to 2004-6-24
• Publication Date: 2004-11

Language

• English

Media Info

• Features: Figures; References;
• Pagination: 2p
• Monograph Title: Proceedings of the 2nd International Conference on Volcanic Ash and Aviation Safety, June 21-24, 2004, Alexandria, Virginia

Subject/Index Terms

• TRT Terms: Dislocation (Geology); Estimating; Gases; Height; Volcanic ash; Volcanic eruptions; Volcanoes
• Uncontrolled Terms: Circular vents; Phreatic eruptions; Tremors; Volcanic explosivity index
• Subject Areas: Aviation; Safety and Human Factors;

Filing Info

• Accession Number: 00988866
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 22 2005 12:00AM