The El Reno tornado of May 31, 2013 is officially the widest known tornado in the U.S. Rated EF-5.http://en.wikipedia.org/wiki/2013_El_Reno_tornadoThe 1935 Balochistan Earthquake occurred on 31 May 1935 at 3:02 am at Quetta, Balochistan, British Indiahttp://en.wikipedia.org/wiki/1935_Balochistan_earthquakeThe 1970 Ancash earthquake was an undersea earthquake that occurred on May 31 of that year.http://astronomy.activeboard.com/t49387553/1970-ancash-earthquake/
The burning of the Jaffna library in 1981 was an important event in the Sri Lankan civil war. http://en.wikipedia.org/wiki/Burning_of_Jaffna_libraryOn 31 May 2010, OPERA researchers observed the first tau neutrino candidate transformation event http://en.wikipedia.org/wiki/Neutrino#MassThe David Dunlap Observatory was officially opened on 31 May 1935http://en.wikipedia.org/wiki/David_Dunlap_Observatory
On 31 May 1967 the Timation-1 satellite was launchedhttp://en.wikipedia.org/wiki/TimationRS-D1 was a 38 kg experimental spin stabilised satellite that was launched on 31st May 1981http://en.wikipedia.org/wiki/Rohini_(satellite)#RS-D1.5B1.5DThe Kristall (Mir space station module) was launched on May 31, 1990 on a Proton rockethttp://en.wikipedia.org/wiki/KristallFoton-M No.2 was launched on the 31st May 2004http://en.wikipedia.org/wiki/Foton-M_No.2Space Shuttle Discovery STS-124 was launched on 31 May 2008 http://en.wikipedia.org/wiki/STS-124
Gulyayev, Vladislav Ivanovich (1937-1990) was a Russian engineer cosmonauthttp://www.astronautix.com/astros/gulyayev.htmVictor Zagainov (May 31, 1953 - October 5, 2002) was a Hot Air Balloon pilot and astronomer from Kazakhstan. http://en.wikipedia.org/wiki/Victor_ZagainovChien-Shiung Wu (May 31, 1912 - February 16, 1997) was a Chinese-American physicist http://en.wikipedia.org/wiki/Chien-Shiung_WuJohn Robert Schrieffer (born May 31, 1931) is an American physicisthttp://en.wikipedia.org/wiki/John_Robert_SchriefferJean-Pierre Christin (May 31, 1683 - January 19, 1755) was a French physicist,http://en.wikipedia.org/wiki/Jean-Pierre_ChristinClarence Augustus Chant (May 31, 1865 - November 18, 1956) was a Canadian astronomer and physicist.http://en.wikipedia.org/wiki/Clarence_Chant
Charles Greeley Abbot (May 31, 1872 - December 17, 1973) was an American astrophysicisthttps://en.wikipedia.org/wiki/Charles_Greeley_AbbotSvante Elis Strömgren (31 May 1870 - 5 April 1947) was a Swedish-Danish astronomer.http://en.wikipedia.org/wiki/Elis_Str%C3%B6mgrenMartin Schwarzschild (May 31, 1912 - April 10, 1997) was a German American astronomer. http://en.wikipedia.org/wiki/Martin_Schwarzschild
Rameses II (The Great) became pharaoh of Ancient Egypt in 1279 BChttp://en.wikipedia.org/wiki/Rameses_IILady Godiva: 31 May 1678, the great Fair at Coventryhttp://astronomy.activeboard.com/t43113686/lady-godiva/
NGC 5663 was discovered by American astronomer Francis Preserved Leavenworth on the 31st May 1886. http://astronomy.activeboard.com/t57707377/ngc-5663/NGC 6111 was discovered by American astronomer Lewis Swift on the 31st May 1887.http://astronomy.activeboard.com/t57707369/ngc-6111/
Type IIP supernova 2011dh was discovered on May 31, 2011.http://astronomy.activeboard.com/t43175694/possible-supernova-in-messier-51/
Antares is visible in the sky all night around May 31 of each year, when the star is at opposition to the Sun.http://astronomy.activeboard.com/t3027593/antares/The last Great Conjunction of the planets Jupiter and Saturn took place on May 31, 2000http://en.wikipedia.org/wiki/Great_conjunctionAsteroid (892) Seeligeria was discovered on May 31, 1918 http://astronomy.activeboard.com/t53883535/asteroid-892-seeligeria/
On 31st May 2013 the 2.7km wide asteroid 1998 QE2 passed the Earth.http://astronomy.activeboard.com/t53174462/asteroid-285263-1998-qe2/
Meteor of May 31, 1917http://astronomy.activeboard.com/t57708035/meteor-of-may-31-1917/South Omega-Scorpiids meteor shower peakhttp://astronomy.activeboard.com/t49387460/south-omega-scorpiids-meteor-shower/North Omega-Scorpiids meteor shower peakhttp://astronomy.activeboard.com/t53877477/north-omega-scorpiids/
MeteoritesNo historic meteorite falls today