Table 1 External variables.

From: The celebrity disaster area effect: exploring the impact of social media on the distribution of humanitarian goods

 

External Variables

Value

Unit

1

Earthquake magnitude

6.8

the Richter scale

2

Source depth

16

Kilometer

3

Distance between Luding and the epicenter

39

Kilometer

4

Distance between Shimian and the epicenter

58

Kilometer

5

Distance between Kangding and the epicenter

86

Kilometer

6

Distance between Hanyuann and the epicenter

98

Kilometer

7

Population density in Luding

38

people per square kilometer

8

Population density in Shimian

43

people per square kilometer

9

Population density in Kangding

11

people per square kilometer

10

Population density in Hanyuan

120

people per square kilometer