Fig. 4: Associations of Twitter/X posts and NAVER news headlines with online search activities during the 2022–23 Korea drought.

a Weekly and daily online search activity volumes from Google Trends (white bars) and NAVER DataLab (green line). b Numbers of daily total posts of X/Twitter (black line) and news articles (green line). Inlet graph in (b) depicts the numbers of daily total Twitter/X posts and NAVER news headlines during the national drought period ((I)). Circles in (b) depict the dates of the drought countermeasure subsidies issue and landfall of Typhoon Hinnamnor, and the recovery of the 2022–23 drought, respectively.