Do cities have a unique magnetic pulse?

We present a comparative analysis of urban magnetic fields between two American cities: Berkeley (California) and Brooklyn Borough of New York City (New York). Our analysis uses data taken over a four-week period during which magnetic field data were continuously recorded using a fluxgate magnetomet...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2022-05, Vol.131 (20)
Main Authors: Dumont, V., Bowen, T. A., Roglans, R., Dobler, G., Sharma, M. S., Karpf, A., Bale, S. D., Wickenbrock, A., Zhivun, E., Kornack, T., Wurtele, J. S., Budker, D.
Format: Article
Language:English
Subjects:
Cross correlation
Data analysis
Fluxgate magnetometers
Frequency analysis
Frequency domain analysis
Magnetic fields
Magnetic measurement
Magnetic signatures
Magnetism
Magnetoresistivity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present a comparative analysis of urban magnetic fields between two American cities: Berkeley (California) and Brooklyn Borough of New York City (New York). Our analysis uses data taken over a four-week period during which magnetic field data were continuously recorded using a fluxgate magnetometer with 70 pT/ Hz noise. We identified significant differences in the magnetic signatures. In particular, we noticed that Berkeley reaches a near-zero magnetic field activity at night, whereas magnetic activity in Brooklyn continues during nighttime. We also present auxiliary measurements acquired using magnetoresistive vector magnetometers (VMRs), with the noise of 300 pT/ Hz, and demonstrate how cross correlation, and frequency-domain analysis, combined with data filtering can be used to extract urban-magnetometry signals and study local anthropogenic activities. Finally, we discuss the potential of using magnetometer networks to characterize the global magnetic field of cities and give directions for future development.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0088264