Earthquake activity around the world in recent years shows that activity increased especially in the last decade like that temblor which occurred in Japan and the earthquake area in Sumatra resulting tsunami. Actually it was not rise, but that may happen because the number of seismologists and earthquake measuring tools increased that are able to capture more seismic activity.
According to the long-term history, quakes of magnitude 7.0 to 7.9 magnitude occurred about more than 10 and an earthquake with a large magnitude above 8 occurred once in the years in the future because of the strength of the tension generated in between two tectonic plates that move convergent or divergent or subduction.
As in the earthquake in Japan, the earthquake in Japan occurred after the seismic jolt that struck NZ a few weeks earlier. Both occurred with a large power over 8 magnitude. In between Sumatra and the Japanese earthquake with strength above 9 magnitude occurred lapse of 7 years.
By comparing what happened globally over 6 magnitude tremors just happened about 100 times in the 80-89 year and increased to 160 times in 2000-2009.
In addition, another data showed that over 8 magnitude earthquake has increased since 2004 from 1.2 to 1.4 annually. However, the results of the study showed that the increase was not significant.
According to the US geological survey conducted research, there have been 10,000 quakes from 1900 to 2015 with the power of magnitude 6 or greater. And the results showed no increase in major earthquakes (more 7 magnitude) from 1979 until 2014.
In an earthquake map that shows the location of a dangerous location in this world showed Asia is quite a lot of seismic activity related to the earthquake, including western America and South America which is close to the Pacific Ocean. In the map of the world showed earthquake prone areas, where tectonic plates move in one of the fault lines, there was the spot for a shaking of the earth. Countries from Chile to Iran including Japan, New Zealand experienced an earthquake-prone zone.
So by looking at the history of the hazard, an area can be tracked in history if ever experienced a large disaster. If the place is near fault lines or around the borders of tectonic plates, that would be more prone to earthquakes.
Activity of Volcanic Eruption Around The World
We know now that according to empiric record occur more frequently because of that the preparation for earthquakes, and strengthening the building and telecommunications can help reduce the danger of the disaster. However, it is not possible to predict where earthquake will strike. The best way is to know how the movement of the soil will be.
In addition, the volcanic activity also increased. In addition there are included in the rankings of super volcanoes such as one in Greece, Bolivia, USA, Chile, Italy and the major eruption as happened inIcelandic volcano in 2010. Increased activity due to the movement of tectonic plates that move with each other by rubbing, bumping or pulling caused a large tension and led to increased volcanic activity.
Asia also experienced similar things as in Kamchatka and Indonesia increasing volcanic activities. This happens because the resulting magma increases from the movement and tension that raised quite a lot.