Four earthquakes in the world:
1. Solomon Islands (Oceania) - 7.0
2. Northern Mexico - 6.2
3. Tonga (Oceania) - 6.9
4. Indonesia - 6.4
Two volcano eruptions:
1. Mauna Loa volcano (Hawaii, United States)
2. Semeru volcano (Indonesia)
Two volcanoes in alert:
1. Volcano in Southern Chile.
2. Volcano in Ecuador.