Top 50 Supercomputer Locations

I just discovered the Supercomputer list (top500.org) last week, and already it is updated.  Having a supercomputer in your city is at least impressive as having a skyscraper and it is probably more useful.  Here is the new list of the top 25, with previous ranking in brackets.

1. San Francisco ("Sequoia", LLNL) [17, upgraded]
2. Osaka ("K", Riken) [1]
3. Chicago ("Mira", Argonne) [new]
4. Munich ("SuperMUC", Leibniz) [new]
5. Tianjin ("Tianhe", NSC-Tianjin) [2]
6. Knoxville TN ("Jaguar", ORNL) [3]
7. Rome ("Fermi", CINECA in Bologna) [new]
8. Rhine/Ruhr ("JuQueen", Juelich) [new]
9. Paris ("Curie",  CEA) [new]
10. Shenzhen ("Nebulae", NSC-Shenzhen) [4]
11. San Francisco ("Pleiades", NASA/Ames) [7, upgraded]
12. Tokyo ("Helios", Rokkasho) [28, upgraded]
13. Manchester ("Blue Joule", Warrington) [new]
14. Tokyo, ("Tsubame", GSIC ) [5]
15. Albuquerque ("Cielo",LLNL) [6]
16. San Francisco ("Hopper", LBNL) [8]
17. Paris ("Tera-100", CEA) [9]
18. Tokyo ("Oakleaf", Univ. of Tokyo) [new]
19. Albuquerque ("Roadrunner", LANL) [10]
20. Edinburgh ("Dirac", Univ. of Edinburgh) [new]
21. Knoxville ("Kraken", Univ. of Tenn.)[11]
22. Moscow ("Lomonosov", Moscow St. Univ) [18, upgraded]
23. Washington ("DARPA", IBM) [new]
24. Stuttgart ("Hermet", Univ. of Stuttgart) [12]
25. Rhine/Ruhr ("JuGene", Juelich) [13]
26. Jinan ("Sunway", NSC-Jinan) [14]
27. San Francisco ("Zin", LLNL) [15]
28. Changsha ("Tianhe Hunan", NSC-Hunan) [16]
29. Paris ("Zumbrota", EDF) [new]
30. Paris ("BlueGene", IDRIS) [new]
31. Melbourne ("Avoca", Victorian Life Scienses) [new]
32. Edinburgh ("Hector", Univ. of Edinburgh) [19]
33. Knoxville ("Gaea", ORNL) [20]
34. London ("Power 775", ECMWF-Oxford) [55, upgraded]
35. London ("Twin Power", ECMWF-Oxford) [new]
36. Tokyo ("BlueGene HEARO", KEK-Tsukuba) [new]
37. Beijing ("Mole", IPE) [21]
38. Chicago ("Intrepid", Argonne) [23]
39. Albuquerque ("Sunblade", Sandia) [24]
40. Austin ("Ranger", Univ. of Texas) [25]
41. Tokyo ("X-GreenBlade", KEK-Tsukuba) [new]
42. San Francisco ("Dawn", LLNL) [26]
43.  London ("Power 775", UKMO) [62,upgraded]
44. Oslo ("Altix", NUST) [new]
45. Paris ("Bull" ) [27]
46. San Francisco ("Cab", LLNL) [new]
47. Albuquerque ("Luna", LANL) [45, upgraded]
48. San Francisco ("Vulcan", LLNL) [new]
49. Toronto/Buffalo ("BlueGene/Q", IBM-Rochester) [29]
50. Toronto/Buffalo ("BlueGene/Q 2", IBM-Rochester) [64, upgraded]

Source: Top500. 

This is a very rapidly changing area.  The 50th computer on this list has a speed of 345 Teraflops, while the 50th computer in Nov. 2011 had a speed of only 204 Teraflops.