2018-08-03T05:04:23Z (GMT) by
16,314 consecutive high-resolution (millikelvin) ground temperature records collected at 15-minute intervals from (UTM time) 01:30 28 March 2015 to 23:45 13 September 2015.
Depths 0.00m, 0.10m, 0.30m, 0.50m, 0.70m, 0.90m and 1.10m.
Location: 19.92216°N, 98.12475°W
Floor of a pine forest on the outskirts of the township of Cruz Colorada, Puebla, Mexico.