Geoelectric hazard maps for the continental United States

Love, Jeffrey J.; Pulkkinen, Antti; Bedrosian, Paul A.; Jonas, Seth; Kelbert, Anna; Rigler, E. Joshua; Finn, Carol A.; Balch, Christopher C.; Rutledge, Robert; Waggel, Richard M.; Sabata, Andrew T.; Kozyra, Janet U.; Black, Carrie E.

doi:10.1002/2016gl070469

i

Geoelectric hazard maps for the continental United States

2016
By Love, Jeffrey J. ; Pulkkinen, Antti ; Bedrosian, Paul A. ; ...

Details

Journal Title:

Geophysical Research Letters
Personal Author:

Love, Jeffrey J. ; Pulkkinen, Antti ; Bedrosian, Paul A. ; Jonas, Seth ; Kelbert, Anna ; Rigler, E. Joshua ; Finn, Carol A. ; Balch, Christopher C. ; Rutledge, Robert ; Waggel, Richard M. ; Sabata, Andrew T. ; Kozyra, Janet U. ; Black, Carrie E.
NOAA Program & Office:

SWPC (Space Weather Prediction Center) ; NWS (National Weather Service)
Description:

In support of a multiagency project for assessing induction hazards, we present maps of extreme-value geoelectric amplitudes over about half of the continental United States. These maps are constructed using a parameterization of induction: estimates of Earth surface impedance, obtained at discrete geographic sites from magnetotelluric survey data, are convolved with latitude-dependent statistical maps of extreme-value geomagnetic activity, obtained from decades of magnetic observatory data. Geoelectric amplitudes are estimated for geomagnetic waveforms having 240 s sinusoidal period and amplitudes over 10 min that exceed a once-per-century threshold. As a result of the combination of geographic differences in geomagnetic activity and Earth surface impedance, once-per-century geoelectric amplitudes span more than 2 orders of magnitude and are an intricate function of location. For north-south induction, once-per-century geoelectric amplitudes across large parts of the United States have a median value of 0.26 V/km; for east-west geomagnetic variation the median value is 0.23 V/km. At some locations, once-per-century geoelectric amplitudes exceed 3 V/km.
Source:

Geophysical Research Letters, 43(18), 9415-9424.
DOI:

https://doi.org/10.1002/2016gl070469
Document Type:

Journal Article
Rights Information:

CC BY-NC-ND
Compliance:

Library
Main Document Checksum:

urn:sha256:b9e391df9eecd504edb00daf2c4902ec3e2d61ee6437ed18660e198bdfded894
Download URL:

https://repository.library.noaa.gov/view/noaa/15300/noaa_15300_DS1.pdf
File Type:

[PDF - 6.26 MB ]

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