Scientists Identify Seismic Trigger Before 2022 Tonga Eruption; Insight Could Improve Tsunami Warnings https://ift.tt/dn5pbyG Scientists Identify Seismic Trigger Before 2022 Tonga Eruption; Insight Could Improve Tsunami Warnings A seismic wave detected shortly before the Hunga Tonga-Hunga Ha'apai eruption in January 2022 could help scientists predict future volcanic activity in remote ocean areas. A study published by the American Geophysical Union suggests that the seismic wave, detected 750 kilometres from the volcano, was likely triggered by a rupture in the oceanic crust. This break allow…