Natural Disasters Week 14

Creep

  • Occurs by soil expansion during freezing

Rockfall

  • Bedrock breaks loose and free falls down a cliff (debris fall)

Threats From Space

  • Solar Storms/Flares

    • Disruption in the suns magnetic field

    • Solar Prominence: Outburst of plasma arcing magnetic field lines

    • Solar Flares: Sudden flash of light releasing tremendous amounts of electromagnetic energy

    • Coronal Mass Ejections: A lot of energy sent in particular direction

  • Bolide Impacts

  • Expanding Sun

  • Supernovas and Gamma Ray Bursts

  • Nuclear Fusion: Bonding nuclei to make bigger nuclei

  • A tiny amount of matter converts into huge amount of energy

  • Sunspots: Variable speed of plasma

    • Areas where the suns magnetic field becomes so intense it distorts

  • Space Objects: Smaller objects hit earth every year

    • Most vaporize when in atmosphere

  • Asteroid: Rocky or metallic object that are larger than 100 m wide

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