Table 1. Investigation dates

Site\Time	1st	2nd	3rd	4th	5th
Mt. Bulgok	2016. 05. 28～2016. 05. 29	2016. 09. 24～2016. 09. 25	2017. 04. 22 ～2017. 04. 23	2017. 08. 20 ～2017. 08. 20	2017. 11. 05