Honolulu Magnetic Observatory

Fact Sheet 2018-3029
By:  and 



Tucked in a grove of thorny mesquite trees, on an ancient coral reef on the south side of the Hawaiian island of Oahu, west of Pearl Harbor, a small unmanned observatory quietly records the Earth’s time-varying magnetic field. The Honolulu Magnetic Observatory is 1 of 14 that the U.S. Geological Survey Geomag­netism Program operates at various locations across the United States and its territories.

Data from these observatories, Honolulu, and those operated by institutions in foreign countries, record a variety of magnetic signals related to a wide diversity of physical phenomena in the Earth’s interior and its surrounding outer-space environment. USGS magnetic observatory operations are an integral part of a U.S. National Space Weather Strategy for monitoring and assessing natural hazards that potentially threaten important technological systems.

Suggested Citation

Love, J.J., and Finn, C.A., 2018, Honolulu Magnetic Observatory: U.S. Geological Survey Fact Sheet 2018–3029, 2 p.

ISSN: 2327-6932 (online)

ISSN: 2327-6916 (print)

Study Area

Table of Contents

  • History
  • Magnetic Signals
  • References
Publication type Report
Publication Subtype USGS Numbered Series
Title Honolulu Magnetic Observatory
Series title Fact Sheet
Series number 2018-3029
DOI 10.3133/fs20183029
Year Published 2018
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Geologic Hazards Science Center
Description 2 p.
Country United States
State Hawaii
City Honolulu
Other Geospatial Oahu
Online Only (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details