I was there and at Wittmund too, luckily at both airfields BEFORE the ash came in
here is my log of aircraft movements of interest for ME at Leeuwarden:
LEEUWARDEN TUESDAY 2010-04-13 RW16
Weather: blue sky, clear air, light to moderate wind, rather cool
Based aircraft (303, 322 and 323 Squadron):
AB.412SP 303 Sqn R-02 T09:20 L12:20
F-16AM 323 Sqn J-513 T09:35 L11:34*
F-16AM 323 Sqn J-631 T09:35 L11:34*
F-16AM 322 Sqn J-876 T09:48 L11:17#3
F-16AM 322 Sqn J-632 T09:48 L11:17#3
F-16AM 323 Sqn J-512 T09:49 L11:17#3
F-16AM 323 Sqn J-202 T09:49 L11:01*
F-16AM 322 Sqn J-879 no badge T09:52 L11:01*
F-16AM 323 Sqn J-881 T09:52 L11:00*
F-16AM 323 Sqn J-362 T09:53 L11:00*
F-16AM 322 Sqn J-509 no badge T10:07 L11:21*
F-16AM 322 Sqn J-632 no badge T10:07 L11:21*
F-16AM 322 Sqn J-516 T14:00 L15:30*
F-16AM 323 Sqn J-872 T14:00 L15:30*
Detached aircraft (all for exercise "Frisian Flag 2010"):
Falcon 20ECM FEKS 053 T09:30 L11:39+
F-16C 31.blt 4053 T09:32 L11:35*
F-16C 31.blt 4055 T09:32 L11:28*
F-16C 31.blt 4061 T09:33 L11:28*
F-16C 31.blt 4041 T09:33 L11:35*
F-4F JG 71 38+42 T09:37 L11:17*
F-4F JG 71 37+75 T09:37 L11:17*
F-4F JG 71 38+26 T09:38 L10:59*
F-4F JG 71 38+24 T09:38 L10:59*
F-15C 493rdFS 84-015/LN bk T09:41 L11:03*
F-15C 493rdFS 86-174/LN bk T09:41 L11:03*
F-15C 493rdFS 84-019/LN bk T09:41 L11:32+
F-15D 493rdFS 86-182/LN bk T09:42 L11:19*
F-15C 493rdFS 86-154/LN bk T09:42 L11:19*
F-18C HävLLv 21 HN-418/18 T09:45 L11:34*
F-18C HävLLv 21 HN-432/32 T09:45 L11:34*
F-18C HävLLv 21 HN-446/46 T09:45 L11:34*
F-18C HävLLv 21 HN-427/27 T09:45 L11:34*
F-16AM 312 Sqn J-646 T09:50 L11:10#4
F-16AM 311 Sqn J-003 T09:50 L11:10#4
F-16AM 311 Sqn J-005 T09:50 L11:10#4
F-16AM 323 Sqn J-146 T09:51 L11:10#4
F-16AM 312 Sqn J-016 T09:59 L11:19*
F-16AM 313 Sqn J-018 T09:59 L11:19*
F-16AM FLO 663 T09:55 L11:29#4
F-16AM FLO 686 T09:55 L11:29#4
F-16AM FLO 687 T09:55 L11:30#4
F-16AM FLO 299 T09:55 L11:30#4
JAS39C F21 39246/246 T09:57 L11:12#4
JAS39C F21 39231/231 T09:57 L11:12#4
JAS39C F21 39275/275 T09:57 L11:12#4
JAS39C F21 39260/260 T09:57 L11:12#4
F-16AM FLO 279 T10:10 L11:31#4
F-16AM FLO 285 T10:10 L11:31#4
F-16AM FLO 659 T10:10 L11:31#4
F-16AM FLO 291 T10:10 L11:31#4
----------------------------------------------------------------------
Falcon 20ECM FEKS 053 T13:35 L15:35+
F-4F JG 71 37+75 T13:43 L15:15*
F-4F JG 71 38+24 T13:43 L15:15*
JAS39C F21 39231/231 T13:45 L15:28#4
JAS39C F21 39265/265 T13:45 L15:28#4
JAS39C F21 39232/232 T13:45 L15:28#4
JAS39C F21 39246/246 T13:45 L15:28#4
F-15C 493rdFS 86-176/LN bk T13:47 L15:32#4
F-15C 493rdFS 86-154/LN bk T13:47 L15:33#4
F-15D 493rdFS 86-182/LN bk T13:48 L15:33#4
F-15D 493rdFS 84-044/LN bk T13:59 L15:32#4
F-15C 493rdFS 84-019/LN bk T13:50 L15:13*
F-15C 493rdFS 84-015/LN bk T13:50 L15:13*
F-18C HävLLv 21 HN-418/18 T13:55 L15:22#4
F-18C HävLLv 21 HN-446/46 T13:55 L15:22#4
F-18C HävLLv 21 HN-432/32 T13:56 L15:23#4
F-18C HävLLv 21 HN-427/27 T13:56 L15:23#4
F-16C 31.blt 4061 T14:07 L15:26*
F-16C 31.blt 4041 T14:07 L15:26*
F-16D 31.blt 4084 T14:20 L15:25*
F-16C 31.blt 4055 T14:20 L15:25*
Visiting aircraft (aircraft change):
F-4F JG 71 37+26 L13:30
F-4F JG 71 38+74 T14:45