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The USGS Geomagnetism Program's Adjusted Data (aka "Provisional" by INTERMAGNET) provides near real time absolutely calibrated and geographically oriented geomagnetic observations. These calibration parameters are usually updated on the first of each month
in order to satisfy geomagnetic observatory standards for accuracy and quality control. Updates are deployed at midnight UTC, and may result in noticeable baseline shifts for observatories whose sensor response characteristics may have changed substantially
since the last such update, or in rare cases, whose actual sensor has been altered or replaced since the last update. To view the results of this month's update, go to:
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<div>https://geomag.usgs.gov/plots/?timeRangeType=custom&endTime=2022-04-01T00:30:00.000Z&startTime=2022-03-31T23:30:00.000Z&type=adjusted&scale=Trace<br>
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<div>Noteworthy issues to report in this notice:</div>
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<li>Deadhorse <b>(DED) Adjusted data processing remains offline</b> because no reliable calibration measurements have been made for nearly two years.</li><li>Guam <b>(GUA) Adjusted data processing remains offline</b> because, after reestablishing communication with it earlier in March, baselines are not yet stable. This may be simply due to noisy observations during absolute calibration measurements, but the
cause needs to be investigated more carefully to be certain. GUA adjusted data processing may be reactivated mid-month.
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</li></ul>
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