Seismo Blog

When a 6. The higher magnitude earthquakes release hugely more energy than the lower magnitude ones and that's why they cause such immense destruction: You tend to remember the big ones.

When friction between two plates is violent enough, seismic shock waves ripple through the ground, rattling everything that stands on it. Over the centuries they have been responsible for millions of deaths and an incalculable amount of damage to property. How bad will the damage get? This Flores Thrust extends for almost miles from Bali in the west along the islands of Lombok and Sumbawa to Flores in the east.

Figure 2: Throughout the centuries earthquakes have been responsible not only for millions of deaths but also for tremendous damage to property and theā€¦.

A seismometer drawing three charts one of them shown in closeup of the Loma Prieta earthquake in San Francisco, California as it happened on October 17, The of earthquake is born in a subduction zone, where one tectonic plate is shoved beneath another.

The epicenter is the point on the surface directly above the focus. Shaking all over Scientists who study earthquakes are called seismologists. Historically, large earthquakes have also occurred along this back-arc thrust near Lombok, particularly in the 19th century but also more recently.

When The Ground Moves

Such earthquakes are called tectonic earthquakes. Many strong earthquakes have occurred along the Flores Thrust over the last years.

Alternative Title: You can see scars across the landscape. The Indian Ocean tsunami killed more than , people along the coast of Sumatra, and in over people were killed by a tsunami impacting the south coast of Java. Observed geologic faults sometimes show relative displacements on the order of hundreds of kilometres over geologic time , whereas the sudden slip offsets that produce seismic waves may range from only several centimetres to tens of metres.

Two types of tectonic plate activity create earthquake and tsunami risk on Lombok

The Pacific Ring of Fire red line: Residents should listen to local authorities and take appropriate precautions while weathering aftershocks. Earthquakes on land can sometimes cause undersea landslides and generate a tsunami wave. Shifting ground alters how signals travel through optical fibers, potentially offering a reliable way to detect earthquakes.

So how can we protect buildings and people in areas where earthquakes are common? Those scars appear when one block of land has moved compared to another. How about putting safety fittings on gas appliances and ensuring that everyone knows how to turn off the gas, electricity, and water in an emergency? Tectonic earthquakes are explained by the so-called elastic rebound theory , formulated by the American geologist Harry Fielding Reid after the San Andreas Fault ruptured in , generating the great San Francisco earthquake.

Earth's diameter is a little under 13, km 8, miles at the equator, so a really fast p-wave can theoretically shoot from one side of the planet to the other in less than half an hour! Gravity NASA: