earthquake research are earthquakes caused.

Earthquakes are the vibrations caused by rocks breaking under stress. The underground surface along which the rock breaks and moves is called a fault plane.

Earthquakes in Australia are usually caused by movements along faults as a result of compression in the Earth’s crust.

2.research and compare the 2004 sumatra and 2011 japan earthquakes and the consequences.

sumatra: the December 26, 2004 magnitude 9.1 Sumatra, Indonesia earthquake (3.316 N, 95.854 E, depth 30 km) generated a tsunami that was observed worldwide and caused tremendous devastation and deaths throughout the Indian Ocean region. The earthquake, which is the third largest in the world since 1900, caused severe damage and casualties in northern Sumatra, Indonesia, and in the Nicobar Islands, India. The tsunami that followed killed more people than any other tsunami in recorded history, with 227,898 dead or missing. The total estimated material losses in the Indian Ocean region were $10 billion and insured losses were $2 billion.


On March 11, 2011, a magnitude-9 earthquake shook northeastern Japan, unleashing a savage tsunami.

The effects of the great earthquake were felt around the world, from Norway's fjords to Antarctica's ice sheet. Tsunami debris continues to wash up on North American beaches two years later.

3.find out why earthquakes are likely to occur in some areas than others.

Earthquakes occur all over the world but there are places where they happen more often. Big earthquakes can be found where plates meet.

80% of the world’s earthquakes happen around the Pacific Ocean—near the east coast of Asia and the west coast of America. Japan has over 2,000 earthquakes every year and California and South America are also very active earthquake zones. The edge of the Pacific Ocean is also called the “Ring of Fire” because there are also many active volcanoes in this region.

4.explain how seismologists are able to make predictions about likelihood of an earthquake.

Today's scientists understand earthquakes a lot better than we did even 50 years ago, but they still can't match the quake-predicting prowess of the common toad (Bufo bufo), which can detect seismic activity days in advance of a quake. A 2010 study published in Journal of Zoology found that 96 percent of male toads in a population abandoned their breeding site five days before the earthquake that struck L'Aquila, Italy, in 2009, about 46 miles (74 kilometers) away. Researchers aren't quite sure how the toads do this, but it's believed that they can detect subtle signs, such as the release of gases and charged particles, that may occur before a quake [source: Science Daily].