It increased by 7 ft a day.” Earthquakes You can predict when a volcano will erupt because you get earthquakes. This is because most volcanoes follow a regular pattern of increasing seismic activity as the eruption is about to take place, usually in the form of small earthquakes. Scientist use special equipment seismometers that tell and record earthquakes that happen underneath the volcano. Long period earthquakes- are beneath volcanoes and are believed that it is caused by magma moving through cracks that then shake the ground. Short period earthquakes- earthquakes under the volcanoes that is believed to be caused by rock breaking events Both types of
Discuss the view that the impact of earthquake hazards depends primarily on human factors [40] An earthquake is a tremor or shockwave in the earth’s crust that is caused by the sudden movement of the crust, resulting in the earth shaking. Most earthquakes are a consequence of tectonic plate movement by tension causing a sudden release of energy or rubbing. These normally occur at plate margins or along fault lines and can cause hazards which need to be prevented where possible. Earthquakes can therefore occur at all plate boundaries, destructive, constructive and conservative but the most damaging tend to happen at destructive margins where the earthquakes have a high magnitude due to the rubbing of the oceanic and continental crusts. A hazard is a natural event that has the potential to effect both life and property.
Earthquakes are caused by the rift and abrupt movement of two rocks that suddenly slip past one another. Earthquakes occur along faults which are fractures in the lithosphere where sections of rock move past one another. There are three important parts to an earthquake: the focus, the epicenter, and seismic waves. The focus is the point on the fault where the separation occurs and from where the seismic waves are formed. The epicenter is located directly above the focus on the earth’s surface.
Cody Walters 11/29/1010 Math 144 Earthquake Intensity and the Richter Scale Earthquakes occur due to the activity of forces, energy, stored deep within the Earth's interior. These forces are constantly affecting the surface of the Earth, forming mountains, valleys, ridges etc. When the energy stored within the Earth is suddenly released, for example by shearing movements along faults in the crust of the Earth, an earthquake results. The area of the fault where the sudden rupture takes place is called the focus point or hypocenter. The point on the Earth's surface directly above the hypocenter is called the epicenter of the earthquake.
The reason for the movement is convection currents originating in the core caused by radioactive decay. Knowing the theory of plate tectonics is a useful tool in understanding the distribution of earthquakes and volcanoes as they correlate very closely. If we map out the location of major earth quakes, location of active volcanoes and a map of general plat tectonic, the 3 would overlap. This gives us a general idea of locations and correlations. Each boundary between 2 plates have the capability of being a different type of boundary.
Ricardo Perez Historical Processes of Puerto Rico San Fermin Earthquake of 1918 The geological position of Puerto Rico raises a concern for earthquakes in the modern day. The island is located very close to the junction of the Caribbean and North American tectonic plates. A combination of seismic and volcanic activity created the Caribbean islands as we know them today. All of the Caribbean islands, with the exception of Barbados, were created from the fierce volcanic activity of the millions of years ago during the Antillean Revolution. Violent movements of the plates in the Post-Glacial era created the Puerto Rican Trench, nearly 24,000 feet deep, which is the deepest point in the Atlantic Ocean.
Index Terms — Seismic Data Acquisition, Earthquake, Accelerometer, ARM, ADC I. INTRODUCTION An earthquake is a natural disaster which can cause damage and loss of lives. It is the result of a sudden release of energy in the Earth’s crust that creates seismic waves. Degree of the damage caused by an earthquake depends upon the distance between the affected area and the epicenter, and also upon the magnitude which indicates how much energy is released from the origin to the Earth’s crust [1]. Analysis of seismic signals is done by seismometers at monitoring stations.
There are divergent boundaries where the plates are moving away from each other and new land is formed as magma is released from inside the mantle. There are convergent boundaries where the plates are moving toward each other. At convergent boundaries mountains or trenches can form. The last type of boundary is a transform boundary where the plates move past each other and can cause an earthquake
Examples of regional metamorphic rocks include schist and gneiss. Thermal metamorphic rocks, also known as contact metamorphic rocks, are formed by extreme heat along with quite a bit of pressure. The pressure pushes the molten rock against the Earth's surface, causing it to recrystallize. Examples of thermal metamorphic rocks are marble and sandstone
Volcanoes and earthquakes In the world, there are many natural disasters which occur without the human's contribution. Volcanoes and earthquakes are some disasters that have a huge impact on many things. These two types of natural events can compare or contrast to each other. These natural disasters have differences more than similarities. Volcanoes and earthquakes are different in three things: the geology, the process, and the effect.