Canie;

Close!

That was indeed a sample (as I said) of one area.

But the following areas represent quakes which followed a quake in the header area, not the single quake first encountered in that area.

In the Tonga sample if I show the quakes we have;

TONGA ISLANDS
1973 12 30 16 39 -15.51  166.64   6.6 VANUATU ISLANDS
1978 3  3  10 52 55.1    164.76   6.2 KOMANDORSKY ISLANDS REGION
1978 3  4  14 57 -4.66   153.1    6.2 NEW IRELAND REGION, P.N.G.
1978 6  11 14 55 49.26   -129.5   6.1 VANCOUVER ISLAND REGION
1978 6  12 8  14 38.19   142.03   7.7 NEAR EAST COAST OF HONSHU, JAPAN
1980 5  27 14 50 37.47   -118.81  6.2 CALIFORNIA-NEVADA BORDER REGION
1980 6  18 17 14 9.48    126.66   7.2 MINDANAO, PHILIPPINE ISLANDS
1980 6  19 6  40 9.52    126.72   6.1 MINDANAO, PHILIPPINE ISLANDS
1980 6  19 8  30 -29.96  -177.99  6.4 KERMADEC ISLANDS, NEW ZEALAND
1980 12 19 23 32 30.58   140.64   6.2 SOUTH OF HONSHU, JAPAN
1981 6  1  15 11 18.73   -107.03  6   OFF COAST OF JALISCO, MEXICO
1982 9  4  13 30 -25.52  -176.24  6   SOUTH OF FIJI ISLANDS
1982 9  4  13 30 -25.52  -176.24  6   SOUTH OF FIJI ISLANDS
1983 1  8  15 4  -3.16   148.2    6.1 BISMARCK SEA
1984 10 13 17 17 15.02   -94.3    6.1 NEAR COAST OF OAXACA, MEXICO
1985 6  4  3  56 4.87    127.48   6   TALAUD ISLANDS, INDONESIA
1990 4  6  14 57 15.18   147.6    6.2 MARIANA ISLANDS REGION
1990 5  20 9  53 -32.5   179.62   6.4 SOUTH OF KERMADEC ISLANDS
1991 1  9  15 8  -5.4    151.84   6.2 NEW BRITAIN REGION, P.N.G.
1993 5  17 16 2  -5.34   151.99   6.5 NEW BRITAIN REGION, P.N.G.
1993 10 5  5  8  -6.13   128.96   6.6 BANDA SEA
1995 4  8  17 44 21.83   142.69   6.7 MARIANA ISLANDS REGION
1995 4  8  17 44 21.83   142.69   6.7 MARIANA ISLANDS REGION
1995 5  8  18 8  11.47   125.96   6.4 SAMAR, PHILIPPINE ISLANDS
1995 8  26 6  56 -5.64   153.54   6   NEW IRELAND REGION, P.N.G.
1996 1  1  9  56 53.83   159.59   6.6 NEAR EAST COAST OF KAMCHATKA
1996 2  16 15 22 37.35   142.38   6.7 OFF EAST COAST OF HONSHU, JAPAN
1996 2  17 5  59 -.89    136.95   8.2 IRIAN JAYA REGION, INDONESIA
1996 2  17 8  41 -.84    136.59   6   IRIAN JAYA REGION, INDONESIA
1997 8  29 8  14 -3.56   144.36   6.9 NEAR N COAST OF NEW GUINEA, PNG.
1998 11 25 18 4  -7.86   158.62   6.2 SOLOMON ISLANDS
1999 12 8  13 34 -9.84   159.96   6.1 SOLOMON ISLANDS
2000 11 1  10 34 -45.07  167.01   6.3 SOUTH ISLAND, NEW ZEALAND
2003 7  4  0  33 -5.47   151.69   6.1 NEW BRITAIN REGION, P.N.G.
2004 4  14 1  54 55.23   162.66   6.2 NEAR EAST COAST OF KAMCHATKA
2005 3  20 1  52 33.81   130.13   6.7 KYUSHU, JAPAN
2006 11 30 21 20 -53.84  -134.36  6.2 PACIFIC-ANTARCTIC RIDGE

Roger