Current Status and Forecast. n Tropical Pacific sea-surface temperatures (SSTs) have warmed from La NiÃ±a. Modoki (below-average SSTs, centered in the central tropical Pacific) to ENSO-neutral. Current SSTs range from slightly below average in the central Pacific to slightly above. average in the eastern Pacific. n The Climate Prediction Center (CPC) defines a La NiÃ±a event as having ONI values. of -0.5Â°C or colder for 5 consecutive months.
Convection currents move tectonic plates when there is heat inside the mantle that is rising and falling. The radioactive decay in the core is responsible for the convection currents.
a tectonic hazard is caused by convectional currents in the earths lithosphere. tectonic activity is responsible for geo-physical hazards such as earthquakes,volcanic eruptions and tsunamis. It is something caused by the movement of the planets tectonic plates under the surface that has a profound effect, such as a volcano of earthquake, or indeed a tsunami such as the one that occured on boxing day 2004.