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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><a href="https://geomag.usgs.gov/plots/?timeRangeType=custom&endTime=2022-06-01T00:30:00.000Z&startTime=2022-05-31T23:30:00.000Z&type=adjusted&scale=Trace" title="https://geomag.usgs.gov/plots/?timeRangeType=custom&endTime=2022-06-01T00:30:00.000Z&startTime=2022-05-31T23:30:00.000Z&type=adjusted&scale=Trace">https://geomag.usgs.gov/plots/?timeRangeType=custom&endTime=2022-06-01T00:30:00.000Z&startTime=2022-05-31T23:30:00.000Z&type=adjusted&scale=Trace</a><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 is reenabled</b> after being offline due mostly to communication issues which have now been resolved.</li><li>San Juan <b>(SJG) Adjusted data processing is temporarily disabled</b>, pending the outcome of an out-of-sequence site visit to address a number of operational issues. If the SJG sensor is not altered during this site visit, SJG Adjusted processing may
be re-enabled mid-month.</li><li>Shumagin <b>(SHU) Adjusted data processing is disabled</b> because the "delta-F" diagnostic was unstable during the month of May, well outside acceptable bounds.<br>
</li></ul>
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