[Geomag-data] USGS Adjusted Geomagnetic Data update for 01-April-2021

[Rigler, Erin (Josh) Joshua]

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 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:

https://geomag.usgs.gov/plots/?timeRangeType=custom&endTime=2021-04-01T00:30:00.000Z&startTime=2021-03-31T23:30:00.000Z&type=adjusted

There are a few noteworthy issues to report in this notice:

  *   Guam (GUA) Adjusted data processing remains offline because adequate absolute calibration measurements have not been made since the acquisition system stabilized from intermittent communication issues last month. If adequate new measurements are made in the coming weeks, GUA may be reactivated mid-month, rather than waiting until May 1st.
  *   Deadhorse (DED) Adjusted data processing remains offline because no calibration measurements have been made for approximately 12 months due to lack of industry partner support at the site due to COVID19-related changes in operations.
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