Disaster on 26 th

Actually I am very interested in studying the natural disasters that often occur lately. After the studied, almost all of these disasters occurred on 26 th. What's the secret? What's with the number 26?

Here is a series of disasters on the 26 th :

1. January 26, 1531 earthquake in Lisbon, Portugal.
2. January 26, 1700 earthquake in the Pacific Ocean a.k.a a megathrust earthquake.
3. July 26, 1805 earthquake in Naples, Calabria, Italy.
4. 26 Aug 1883 Mount Krakatoa erupted.
5. 26 Dec 1861 earthquake in Egion, Greece.
6. 26 Mar 1872 earthquake in Owens Valley, USA.
7. 26 Aug 1896 earthquake in Skeid, Land, Iceland.
8. 26 November, 1902 earthquake in Bohemia, now Czech Republic.
9. 26 November, 1930 earthquake in the Izu
10. September 26, 1932 earthquake in Ierissos, Greece
11. 26 Dec 1932 earthquake in Kansu, China.
12. October 26, 1935 earthquake in Colombia.
13. 26 Dec 1939 earthquake in Erzincan, Turkey.
14. November 26, 1943 earthquake in Tosya Ladik, Turkey.
15. 26 Dec 1949 earthquake in Imaichi, Japan.
16. May 26, 1957 earthquake in Bolu Abant, Turkey.
17. Mar 26, 1963, earthquake in Wakasa Bay, Japan.
18. July 26, 1963 earthquake in Skopje, Yugoslavia.
19. May 26, 1964 earthquake in S. Sandwich Island.
20. July 26, 1967 earthquake in Pulumur, Turkey.
21. September 26, 1970 earthquake in Bahia Solano, Colombia.
22. July 26, 1971 earthquake in the Solomon Island.
23. April 26, 1972 earthquake in Ezine, Turkey.
24. May 26, 1975 earthquake in N. Atlantic.
25. 26 Mar 1977 earthquake in Palu, Turkey.
26. 26 Dec 1979 earthquake in Carlisle, England.
27. April 26, 1981 earthquake in Westmorland, USA.
28. May 26, 1983 earthquake in Nihonkai, CHUBU, Japan.
29. January 26, 1985 earthquake in Mendoza, Argentina.
30. January 26, 1986 earthquake in Tres Pinos, USA.
31. April 26, 1992 earthquake in the Cape Mendocino, California, USA.
32. October 26, 1997 earthquake in Italy.
33. 26 Desember'04 tsunami in Aceh.
34. May 26, 2006 earthquake in Yogyakarta.
35. 26 June 2010 Gempa Tasikmalaya.
36. October 26, 2010 Tsunami Mentawai.
37. October 26, 2010 Mount Merapi Exploding.