Historical eventOctober 152013

Seismic magnitude scales

The 7.2 Mw Bohol earthquake strikes the Philippines. At least 215 were killed.

Everything on October 15Original source

In context

When
Tuesday, October 15 201313 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
21st century · 2010s
Recorded from
Wikipedia “On this day” feed

At a glance

Dates: From 2013.

What happened

Seismic magnitude scales are used to describe the overall strength or "size" of an earthquake. These are distinguished from seismic intensity scales that categorize the intensity or severity of ground shaking (quaking) caused by an earthquake at a given location. Magnitudes are usually determined from measurements of an earthquake's seismic waves as recorded on a seismogram. Magnitude scales vary based on what aspect of the seismic waves are measured and how they are measured.

October 15 through the years

Other entries on the same calendar day, in order.

  1. 2003Shenzhou 5
  2. 20062006 Kiholo Bay earthquake
  3. 2006Seismic magnitude scales
  4. 20072007 New Zealand police raids
  5. 2007New Zealand Police
  6. 2008Dow Jones Industrial Average
  7. 201115 October 2011 global protests
  8. 20132013 Bohol earthquake
  9. 2013Seismic magnitude scales
  10. 2016Montreal Protocol
  11. 2018Kidnapping of Jayme Closs

Also in 2013

  • May 112013 Reyhanlı car bombingsTwo car bombs by unknown perpetrators exploded in Reyhanlı, Turkey, resulting in 52 killed and 140 injured.
  • September 12NASANASA confirms that its Voyager 1 probe has become the first manmade object to enter interstellar space.
  • September 13TalibanTaliban insurgents attack the United States consulate in Herat, Afghanistan, with two members of the Afghan National Police reported dead…
  • September 15Ivan KuleshThe Belarusian serial killer Ivan Kulesh murdered two saleswomen in Lida.
  • September 16Washington Navy Yard shootingA lone gunman fatally shot twelve people and injured three others at the headquarters of the Naval Sea Systems Command in Washington, D.C.
  • September 17Grand Theft Auto VGrand Theft Auto V earns more than half a billion dollars on its first day of release.
  • September 18Via RailA VIA Rail train crashes into a double-decker bus at a train station in Ottawa, Canada, killing six people and injuring 35 others.
  • November 17Tornado outbreak of November 17, 2013An outbreak of 77 confirmed tornadoes occurred in seven U.S. states; it became the largest November tornado outbreak in Illinois and Indi…

Everything we record for 2013 →

Sources

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“Seismic magnitude scales”, What's On This Date, https://whatsonthisdate.com/app/event/seismic-magnitude-scales-2013-october-15, accessed October 27, 2026.

Cite the underlying source as well — the source links above go to the record this entry is adapted from.

Questions about this entry

When did Seismic magnitude scales happen?

October 15 2013 — 13 years ago, on a Tuesday.

Where does this text come from?

Wikipedia “On this day” feed. Summaries are short adaptations that link back to the source, not reprints.

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