On this day

April 20, 2013

Revisit the music, news, notable people, and historical moments connected to this date.

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Headlines from April 20, 2013

Music on My Birthday

Billboard 200

The Top 50 albums for the chart week of April 17, 2013, covering April 20, 2013.

  1. 1
    Album cover for The 20/20 Experience by Justin Timberlake

    The 20/20 Experience

    Justin Timberlake

    Last week
    1
    Peak
    1
    Weeks
    3
  2. 2
    Album cover for Pioneer by The Band Perry

    Pioneer

    The Band Perry

    Last week
    —
    Peak
    2
    Weeks
    1
  3. 3
    Album cover for Wolf by Tyler| the Creator

    Wolf

    Tyler| the Creator

    Last week
    —
    Peak
    3
    Weeks
    1
  4. 4
    Album cover for Based On A True Story ... by Blake Shelton

    Based On A True Story ...

    Blake Shelton

    Last week
    3
    Peak
    3
    Weeks
    2
  5. 5
    Album cover for I Am Not A Human Being II by Lil Wayne

    I Am Not A Human Being II

    Lil Wayne

    Last week
    2
    Peak
    2
    Weeks
    2

Historical Events

2013A 6.6-magnitude earthquake strikes Lushan County, Ya'an, in China's Sichuan province, killing at least 193 people and injuring thousands.[†]

The moment magnitude scale is a measure of an earthquake's magnitude based on its seismic moment. Mw  was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori. Similar to the local magnitude/Richter scale (ML ) defined by Charles Francis Richter in 1935, it uses a logarithmic scale; small earthquakes have approximately the same magnitudes on both scales. Despite the difference, news media often use the term "Richter scale" when referring to the moment magnitude scale.

Historical Context for April 20, 2013

In 2013, the world population was approximately 7,291,793,585 people[†]