World Stress Map

The coverage contains information on contemporary tectonic stress in the crust. To determine the tectonic stress orientation, different types of stress indicators are used in the World Stress Map. They are grouped into four categories: -earthquake focal mechanisms (58%) -well bore breakouts (27%) -in-situ stress measurements (overcoring and hydraulic fracturing,11%) -young geologic data (from fault slip analysis and volcanic vent alignments, 4%)