Mount Adams Electromagnetic and Magnetic Data

Metadata Updated: October 10, 2019

Hydrothermally altered rocks, particularly if water saturated, can weaken stratovolcanoes, thereby increasing the potential for catastrophic sector collapses that can lead to far-traveled, destructive debris flows, which are the largest volcanic hazards for Mount Adams and Mount Baker. Evaluating the hazards associated with such alteration is difficult because much of the alteration is obscured by ice and its depth extent is unknown. Intense hydrothermal alteration significantly reduces the resistivity and magnetization of volcanic rock and therefore hydrothermally altered rocks are identified with helicopter electromagnetic and magnetic measurements at Mount Baker and Mount Adams. High resolution magnetic and electromagnetic data were collected using the RESOLVE multi-coil, multi-frequency electromagnetic system supplemented by a high sensitivity cesium magnetometer. The survey took place out of over Mount Adams, Washington during May of 2002. The survey covers an area centered on Mount Adams. Data were collected along north-south flight lines with east-west tie lines. A nominal EM sensor flight height of 60 m was maintained, except where safety dictated a higher elevation. A total of 200 kilometers over 2 survey blocks (including the Mount Baker area) were flown. Three files are available in this publication and include flight line data for the magnetic survey, flight line data for the gravity gradiometry survey and a report describing the survey parameters, field operations, quality control and data reduction procedures.

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License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Date June 28, 2017
Metadata Created Date July 9, 2019
Metadata Updated Date October 10, 2019
Reference Date(s) January 1, 2017 (publication)
Frequency Of Update asNeeded
Frequency Of Update asNeeded

Metadata Source

Harvested from DOI CKAN Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Date June 28, 2017
Metadata Created Date July 9, 2019
Metadata Updated Date October 10, 2019
Reference Date(s) January 1, 2017 (publication)
Responsible Party U.S. Geological Survey (Point of Contact)
Contact Email
Access Constraints Use Constraints: There is no guarantee concerning the accuracy of the data. Users should be aware that changes may have occurred since measurement and publication; therefore some parts of this dataset may no longer be applicable. This dataset should not be used to extract precise values but instead be used to examine regional patterns. Users should not use these data for critical applications without a full awareness of their limitations. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to for the U.S. Geological Survey disclaimer., Access Constraints: none
Bbox East Long -121.45956
Bbox North Lat 46.226202
Bbox South Lat 46.179009
Bbox West Long -121.522707
Coupled Resource
Frequency Of Update asNeeded
Harvest Object Id 27c90955-2d40-4e1f-b4cb-34e4e5682cb9
Harvest Source Id 34ce571b-cb98-4e0b-979f-30f9ecc452c5
Harvest Source Title DOI CKAN Harvest Source
Licence Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester true
Temporal Extent Begin 2002-05-08
Temporal Extent End 2002-05-15

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