Fig. 1: Spatial and temporal variation of the confinement measures in coastal countries during the first half of 2020.
From: Tracking the global reduction of marine traffic during the COVID-19 pandemic

We use the Stringency Index (100 = strictest response) as an indicator of confinement measures for coastal countries (n = 124). a Monthly mean per country. b Global daily average and standard deviation from 1 January 2020 until 30 June 2020. Vertical dotted line represents the World Health Organization pandemic declaration on 11 March 2020. c Individual series for selected countries, ordered according to the first date when the Stringency Index was above the first quintile. Note that data were not available for all coastal countries.