The data is not entered yet in TEPCO's plant parameter page. The last measurement of the location - RPV Bottom Part - is at 11AM on February 5, at 68.6 degrees Celsius (as reported in the previous post).
So it went up 3.1 degrees Celsius in 5 hours, the sharpest rise yet since February 1.
From Jiji Tsushin (8:16PM 2/5/2012):
Reactor 2 RPV temperature at Fukushima I Nuke Plant risen above 70 degrees Celsius, TEPCO increases water injection
TEPCO announced on February 5 that one of the thermometers on the bottom of the Reactor Pressure Vessel of Reactor 2 at Fukushima I Nuclear Power Plant registered 71.7 degrees Celsius at 4PM. The location is one of several temperatures that [the company uses] to gauge the situation. The temperature there has risen sharply since it registered 52.0 degrees Celsius at 11PM on February 1. However, at two other locations at the same height, the temperatures remain steady around 45 degrees Celsius. TEPCO is considering the possibility of instrument failure, but in the meantime has increased the amount of water injected into the reactor by 1 tonnes, to 9.6 tonnes/hour and see if it makes difference.
The new safety regulation approved by the Nuclear and Industrial Safety Agency after the March 11, 2011 accident specifies that it is considered "deviation from operational limit" when the temperature taken at the standard locations reaches 80 degrees Celsius or the amount of injection water is increased by 1 tonnes [per hour?] per day, and the local municipalities have to be notified. TEPCO is planning the analysis of the gas inside the reactor in order to maintain the "cold shutdown state" where the temperature remains 100 degrees Celsius and lower and to prevent "recriticality" where the melted fuel starts nuclear chain reaction.
I wonder if the local municipalities have been notified.