Dear Richard, Ray ... here's Leeds' April 2000 dataset.
regards,
Roger Clark

YR2000
SEISMO
N0004

APR 01
HPK IP 1229164 T0.7 A26

APR 01
HPK IP 1229240 T0.8 A10

APR 01
HPK IP 1231555 T1.0 A45

APR 01
HPK IP 1233198 T0.8 A26

APR 06
HPK IP 0015007 T1.1 A89
LMK IP 0014519
LCP IP 0015023
LRN IP 0015030
LHO IP 0015011
LDU EP 001500

APR 07
HPK IP 1901339 T1.1 A20

APR 10
HPK IP 1000548 IS00585 ((LOCAL, ML0.05, DISTANCE 24KM, PROBABLY QUARRY))

APR 11
HPK IP 070116.2 T1.8 A128

APR 13
HPK IP 1103049 IS03090 ((LOCAL, ML0.24, DISTANCE 27KM, PROBABLY QUARRY))

APR 17
LMK IP 0444076
LCP IP 0444044
LRN IP 0444050
HPK IP 0444063
LHO IP 0444072
LDU EP 044407

APR 18
HPK IP 1045137 IS45176 ((LOCAL, ML0.89, DISTANCE 26KM, PROBABLY QUARRY))

APR 18
HPK IP 1322272 T0.7 A12

APR 18
HPK IP 1747285 T0.7 A51  E4824
LMK IP 1747300
LCP IP 1747262
LRN IP 1747267
LHO IP 1747293
LDU EP 174728

APR 19
LMK EP 0227507
LCP EP 0228024
LRN EP 0228021
HPK IP 0227586
LHO IP 0227574

APR 20
HPK IP 0850072 T0.9 A25

APR 21
HPK IP 0446575 T1.6 A48

APR 21
HPK EP 121929  T1.1 A23

APR 23
HPK IP 0939535 T1.0 A149  I39580 E4217 E4339

APR 23
HPK IP 1713477 T1.1 A26

APR 23
HPK IP 1832393 T0.5 A29

APR 24
HPK IP 0511162 IS11299 ((LOCAL, ML2.17, DISTANCE 108KM, EARTHQUAKE))

APR 26
HPK IP 1351264 T1.0 A11

APR 27
HPK IP 1908446 T0.7 A6

APR 28
HPK IP 1254515 iS54541 ((LOCAL, ML-0.2, DISTANCE 15KM, PROBABLY QUARRY)) 

APR 29
HPK IP 2004526 T1.7 A150
LMK IP 2004558
LCP IP 2004543
LRN IP 2004528
LWH IP 2005559
LHO IP 2004515
LDU EP 200453

APR 30 
HPK IP 0908355
LHO IP 0908368
LMK IP 0908372

APR 30
HPK IP 1252056 T1.1 A18

STOP