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<div dir="ltr">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=2022-10-01T00:30:00.000Z&startTime=2022-09-30T23:30:00.000Z&type=adjusted&scale=Trace" title="https://geomag.usgs.gov/plots/?timeRangeType=custom&endTime=2022-10-01T00:30:00.000Z&startTime=2022-09-30T23:30:00.000Z&type=adjusted&scale=Trace">https://geomag.usgs.gov/plots/?timeRangeType=custom&endTime=2022-10-01T00:30:00.000Z&startTime=2022-09-30T23:30:00.000Z&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 over two years.</li><li>Shumagin <b>(SHU) Adjusted data processing remains offline</b> because the "delta-F" diagnostic has been unstable for several months, well outside acceptable bounds. Also, there was a nearby earthquake on 9/29/2022 that appears to have shifted baselines.<br>
</li></ul>
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