Here is a list of the aftershocks from the 7th to 9th.
09-APR-2011 21:23:05 35.67 140.04 4.9 64.6 NEAR EAST COAST OF HONSHU, JAPAN
09-APR-2011 12:57:49 30.01 131.81 6.1 21.3 KYUSHU, JAPAN
09-APR-2011 09:42:21 38.26 141.70 5.4 59.5 NEAR EAST COAST OF HONSHU, JAPAN
09-APR-2011 02:59:34 38.67 141.75 4.6 35.0 NEAR EAST COAST OF HONSHU, JAPAN
09-APR-2011 02:33:49 39.72 143.32 4.7 32.8 OFF EAST COAST OF HONSHU, JAPAN
09-APR-2011 02:31:03 39.91 143.14 4.8 23.8 OFF EAST COAST OF HONSHU, JAPAN
09-APR-2011 01:25:29 36.80 142.10 5.4 34.4 OFF EAST COAST OF HONSHU, JAPAN
08-APR-2011 21:30:13 36.66 143.21 4.9 42.8 OFF EAST COAST OF HONSHU, JAPAN
08-APR-2011 18:42:31 43.90 147.47 5.3 63.4 KURIL ISLANDS
08-APR-2011 10:04:19 37.93 143.95 4.8 32.9 OFF EAST COAST OF HONSHU, JAPAN
08-APR-2011 09:08:40 36.97 144.28 4.6 36.7 OFF EAST COAST OF HONSHU, JAPAN
08-APR-2011 02:57:20 36.80 141.04 4.9 40.7 NEAR EAST COAST OF HONSHU, JAPAN
07-APR-2011 22:02:19 39.15 142.90 5.2 34.0 NEAR EAST COAST OF HONSHU, JAPAN
07-APR-2011 15:31:28 38.30 142.12 4.6 67.0 NEAR EAST COAST OF HONSHU, JAPAN
07-APR-2011 15:25:13 38.20 141.87 4.6 67.0 NEAR EAST COAST OF HONSHU, JAPAN
07-APR-2011 14:32:41 38.25 141.64 7.4 25.6 NEAR EAST COAST OF HONSHU, JAPAN
07-APR-2011 10:52:13 35.61 140.49 4.7 36.0 NEAR EAST COAST OF HONSHU, JAPAN
07-APR-2011 08:25:06 37.61 141.89 4.6 31.0 NEAR EAST COAST OF HONSHU, JAPAN
07-APR-2011 06:34:24 37.93 142.66 4.6 39.0 OFF EAST COAST OF HONSHU, JAPAN
07-APR-2011 02:40:48 36.51 140.83 4.9 49.0 NEAR EAST COAST OF HONSHU, JAPAN
I think the chart for reactor does not ‘stop’ on the 8th. It’s more like it ‘goes’ on the 8th. I think on that date, the readings for reactor 1 ‘go’ straight up and off the chart (capacity of their sensors to provide a reading) and rather than say list ‘off the chart’ or ‘unkown’ or ‘100plus’ etc., they leave it blank.
And you are probably right about off-the-chart.