Motivation

  • NOAA’s magnetospheric real-time disturbance field calculator was presented at 2012 ISCWSA meeting at San Antonio.
  • Updated the calculator to use latest USGS 1 minute Dst
  • Validation against magnetic observatory and MWD data

Geomagnetic Field

  • Main field
    • Convection in the outer core
    • 95% of the observed strength
    • Secular variation
    • Data by satellite and observatories
  • Crustal field
    • Magnetized rocks in the crust
    • Does not change with time
    • Data by satellite, ship and aircrafts
  • External field
    • Currents in the magnetosphere and ionosphere
    • Disturbance by space weather
    • Upper atmospheric winds
    • Data by satellite and observatories

Real-time modeling of geomagnetic field

  • What is included
    • Magnetospheric variations caused by space weather
    • Rotation of the Earth in the magnetosphere
    • Secondary magnetic fields of electric currents, induced by time-varying magnetic fields in the conducting Earth and oceans
  • How
    • USGS real-time Dst* index (ground observatories), backup from WDC Kyoto
    • NASA solar wind measurements (ACE satellite)
    • Cloud based real-time modeling

....

View the entire Presentation:

A Real-time Magnetic Disturbance Model to Improve Drilling Accuracy in Low and Mid Latitudes of the Earth

Manoj Nair, Adam Woods, Arnaud Chulliat, Patrick Alken and Nir Boneh

Thanks to Stefan Maus (MagVar), Benny Poedjono (Schlumberger)  

 

More from Meeting 42