The Japanese government did not keep records of key meetings during the crisis.[206] Data from the SPEEDI network were emailed to the prefectural government, but not shared with others. Emails from NISA to Fukushima, covering 12 March 11:54 PM to 16 March 9 AM and holding vital information for evacuation and health advisories, went unread and were deleted. The data was not used because the disaster countermeasure office regarded the data as "useless because the predicted amount of released radiation is unrealistic."[207] On 14 March 2011 TEPCO officials were instructed not to use the phrase "core meltdown" at press conferences.[208]