Seismology

Breaking news: Just yesterday at 4:53 pm, the country of Haiti was Figure 1: Port-Au-Prince flattened by 7.0 earthquake. flattened by a devastating earthquake with a magnitude of 7.0 causing major destruction. The epicentre was 13 km from the capital of Haiti, Port-Au-Prince. The initial estimates for this disaster, placed the death toll around 210,000. Sadly, this estimate was horribly wrong with the death toll rising well above 300,000. There were many reasons for the death rising so high,…

Sushil Bhandari (1997) defined vibration as a repeated movement in the normal rest position. The parameters involved with vibration are commonly amplitude or displacement and velocity or acceleration of the ground movement (Visvan, 2005). During demolition operation, vibration is normally caused by the impact of fallen structures or by the use of explosives (BS 6187:2000), which could pose detrimental effects of structural damage of adjacent premises, buried services like gas pipes, disturbance…

Garbage is spread everywhere, lives are lost, buildings are razed to the ground, and cars have been tossed like soccer balls. Actually, this would be the effects of a natural disaster.Earthquakes are among the dreadful consequences of nature that may cause loss of life and food shortage (Figure 1).In fact, earthquakes often happen when two rock plates encounter each other, creating friction. Due to the strength of the force, shock waves will be sent through the ground, creating an earthquake (…

We've always known the horrific damage earthquakes can cause. The 1906 earthquake in San Francisco is famously known for destroying much of the city and causing the death of many people. Similarly and more recently the 2010 Haiti Earthquake was a reminder of the awe-inspiring damage natural disasters like earthquakes can do. The 2010 Haiti Earthquake is also an excellent reminder of what kind of harm earthquakes can do if the community effect is ill prepared. This may be a very important…

Many theories are suspected of being the cause of the fall of these civilizations. When comparing the political, social and economic effects that led to the fall of these civilizations, there are many similarities and differences. Agriculture may have been the cause because it had much impact on these empires. Some experts say that the drying up of the Saraswati River may have been the main cause of the fall of the Indus Valley. Others experts say there may have been a flood in the…

How do scientists known what the center of the earth is? There 4 ways how scientist found out about the center of the earth ( aka inner core and outer core). Answer 1: Geologists hypothesize that the Earth's center is composed of predominantly iron. The outer portion of the center, known as the "outer core", is thought to be liquid iron. While the interior portion of the center, known as the "inner core" is thought to be solid iron. Answer 2: The main evidence for the structure of the Earth…

Earthquake Brace & Bolt Program in California The moment an earthquake hits, older homes, in particular, have a higher risk encountering more damage. Whenever the ground trembles their foundations wobble, causing the upper half of the property to slip and collapse. To lessen the structural damage caused by earthquakes, it’s a good idea to have the home retrofitted through the Earthquake Brace & Bolt Program. What’s the Earthquake Brace & Bolt Program? The Earthquake Brace & Bolt Program, or the…

The region is tectonically characterized by the ~6 kilometer thick oceanic Nazca plate subducting underneath the continental South American plate at a convergence azimuth of ~ 78 ͦ and at a rate of 6.6 centimeters per year making the area one of the most active convergent margins on earth, typically experiencing a Mw > 8 earthquake every 10 – 20 years (Moscoso, et.al., 2011). Notable quakes in recent history include the 1960 Mw = 9.5 Valdivia earthquake which was the largest ever recorded,…

Elysium Questions 1. What do you think about the above establishing shots of Los Angeles and Elysium? Extreme long shot is used for emphasis the environment of two different place. The Los Angeles in Earth where ever be the civilized town was shown in the ruin town. The extreme long shot gives the picture of devastation; pollution, disease, and homeless. On the other hand, the Elysium was shown in productive place. Elysium is the place for wealth people, there are high-technology building…

On the 27th of February, 325 kilometres southwest of Santiago at 3:34 am an 8.8 magnitude earthquake struck offshore central Chile leaving 122 aftershocks of magnitude 5.0 or greater which is The intense trembling lasted for around three minutes causing large-scale damage and affected approximately 80% of the population and leaving over a million without a home. Coastal Chile is well known for having deadly earthquakes, with a series of thirteen earthquakes 7.0 magnitude or higher since 1973.…