How many deaths does it take for a disaster to receive news coverage?

Disaster occurrence and news coverage data is used to compute the casualties ratio. The casualties ratio indicates how many casualties would make mediacoverage (in major US networks) equally likely, all else equal.

38,9203,1502,3951,6968826742801221Food shortageCold waveDroughtEpidemicLandslideFloodStormFireEarthquakeVolcano
How many deaths does it take for a disaster to receive news coverage?

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