Aurora Tracker

Know when to look up.

Real-time aurora forecasts, live space weather and alerts for geomagnetic storms, solar flares and CMEs, so you're outside when the sky lights up.

Get it onGoogle Play Free to download. Optional one-time Pro upgrade.
Bz magnetic field and solar wind speed charts
Tonight's aurora forecast map over Alaska
Storm conditions: Kp 7.0, Bz -9.9 nT, solar wind 776 km/s, Should I Go? says GO
Active sunspot regions on the solar disc
Hemispheric power chart, 26 GW north and south

Everything you need on a storm night

The numbers that decide whether tonight is worth it, pulled from NOAA and NASA and refreshed every few minutes.

Live conditions

See the storm build in real time

Solar wind, Bz, Kp and Hp30, hemispheric power and aurora probability for your location, updated through the night.

  • Kp 0–9
  • Bz nT
  • Wind km/s
  • Hemi power GW
Aurora conditions screen

Forecasts

Plan the week, not just tonight

The Kp 3-day forecast, the 27-day outlook, Hp30 nowcasts and NOAA's OVATION map of where the oval sits tonight.

  • 3-day Kp
  • 27-day outlook
  • Hp30 nowcast
Kp 3-day forecast chart

Storm alerts

Get pinged at the level you care about

Notifications for geomagnetic storms, strong solar flares and incoming CMEs. Pick a threshold from G1 minor to G5 extreme, depending on how far south you are.

  • G1 minor
  • G3 strong
  • G5 extreme
  • X-class flares
Alert threshold settings, G1 to G5

Solar activity

Watch the Sun that starts it all

Sunspot regions, X-ray flares, CME forecasts, SDO imagery and NOAA's three-day outlook in one place, with a built-in guide to what every number means.

  • Regions & spots
  • WSA-Enlil CMEs
  • SDO 131 · 193 · 304 Å
Sunspot regions screen

Aurora Tracker Pro

Should I go out tonight?

One-time purchase. No subscription.

  • Should I Go? — tonight's go / no-go verdict
  • Hourly cloud cover forecast
  • Local weather and viewing quality score
  • Hunt Log to record your sightings
  • Local time across every chart
  • No ads

Not sure yet? Watch a short ad in the app to try Should I Go?, local weather and the hourly cloud forecast for a limited time.

Hourly cloud cover forecast
Hunt Log with recorded sightings

The next storm is already on its way

Install Aurora Tracker, set your alert level, and let the Sun tell you when to head out.

Get it onGoogle Play

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