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Geomagnetic Storm Watch Issued for Oct. 16–17 as Multiple CMEs Head for Earth

Forecasters cite several CMEs that could push Kp to 5–6, raising odds of aurora at mid‑latitudes.

Overview

  • NOAA’s Space Weather Prediction Center forecasts G1–G2 geomagnetic conditions on Oct. 16–17, with an initial arrival window around 21:00–00:00 UT on Oct. 16.
  • Aurora could be visible from northern U.S. states between New York and Idaho, across much of Canada, and in the U.K. as far south as Yorkshire.
  • The disturbances are linked to multiple CMEs launched between Oct. 11 and 13, which forecasters say may overlap and enhance effects.
  • NOAA notes that G2‑level activity can cause satellite issues and power grid fluctuations, with impacts dependent on real‑time magnetic field orientation.
  • Viewers are advised to seek dark skies near local midnight and monitor NOAA’s 30‑minute aurora products, with a sustained southward Bz improving visibility prospects.