Table 1.

N (number of wireless emergency alerts [WEAs]) and DCN (daily cumulative number of WEAs) at hour level for WEAs issued in 25 districts of Seoul between January 2020 and January 2021.

Hour	N	DCN
0	0.000	0.000
1	0.000	0.000
2	0.000	0.000
3	0.000	0.000
4	0.000	0.000
5	0.000	0.000
6	0.001	0.000
7	0.002	0.001
8	0.004	0.004
9	0.030	0.008
10	0.058	0.038
11	0.052	0.097
12	0.018	0.149
13	0.036	0.166
14	0.042	0.203
15	0.047	0.244
16	0.056	0.291
17	0.088	0.347
18	0.122	0.435
19	0.047	0.557
20	0.025	0.604
21	0.016	0.629
22	0.003	0.645
23	0.000	0.649