isokeraunic

isokeraunic

[¦ī·sō·kə′rȯn·ik]
(meteorology)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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is the ground flash density, which is equal to 0.15 strikes per square kilometers per lightning day; Td is the isokeraunic level, in our calculation the isokeraunic level is chosen as 40 days per year.
Where an isokeraunic number of 30 indicates average lighting activity of about 13.7 strikes per square mile annually, the region developed by the oil production operation has an isokeraunic number of 120, indicating about 41 annual lightning strikes per square mile.
In the case study, certain number of the above lightning techniques has been employed to check physical damage to structures and failure of electronic systems at the premises of a mining company located in a lightning prone area having isokeraunic level of 160 [6].