EARTHQUAKE. One of the most dangerous disaster in this world. A kind of disaster that is unpredictable. Many can be victimized by this because no machine as of today can detect the upcoming earthquake. What do people know about earthquake? Are people really prepared when an earthquake occurs despite of the modern times now?
EARTHQUAKE is the movement of earth’s surface. Earthquakes happen along cracks in earth’s surface, called fault lines, and can be felt over along large areas although they usually last for less than one minute. And as mentioned above, earthquakes cannot be predicted – although scientist are working on it.
An EARTHQUAKE is caused by a sudden slip of on a fault. Tectonic plates are always moving slowly but, they get stuck at their edges due to friction. This causes the energy waves to travel on earth’s crust and cause the shaking that we feel and that’s what we call EARTHQUAKE.
HYPOCENTER is the location below the earth’s surface where the earthquake starts and EPICENTER is the location directly above it on the surface of the earth.
There are some smaller earthquakes that occur before the larger earthquake. This is what we call the FORE SHOCKS. Scientist can’t tell that the earthquake is a fore shock, until larger earthquake happens. The largest, main earthquake is call the MAIN SHOCK. After the main shocks there’s always an AFTER SHOCKS. These are shorts shakes that we feel after the main shock. Sometimes, aftershocks last for a week or a month depending on the size of the main shock.
The instrument use in measuring an earthquake is called SEISMOGRAPH. The recordings they make is called the SEISMOGRAM. (For additional information visit https://earthquake.usgs.govlearn/kids/eqscience.php)
Since where talking about measurement of the earthquake, there’s two way of measuring an earthquake, by MAGNITUDE and by INTENSITY. Magnitude refers to the energy released by an earthquake and is determined from measurements on seismographs. Intensity on the other hand is measured based on the strength of shaking produced by an earthquake at a certain location. It is determined from effects on people, structures, and natural environment. The PHILVOCS or the Philippine Institute of Volcanology and Seismology is the government agency that is responsible in updating and measuring the earthquakes that are happening here in the Philippines.
Some of us are not aware or doesn’t know what to do when an earthquake occurs. Now here are the things on what to do before, during, and after an earthquake. Before an earthquake, it is better to familiarize the place where you usually stay. Identify some of the safe places such as under a sturdy of furniture or against and interior wall in your home, office, or school so when the shaking starts, you DROP to the ground, COVER your head and neck with your arms, and if a safer place is nearby, crawl to it and look for something strong that you can HOLD ON. Before an earthquake occurs, secure some of the items that might fall and could cause you injury. During an earthquake, look for a hard object that can cover you from falling debris such as furniture. DROP your body on the ground, COVER your head and neck, and CRAWL to the nearest hard object near you. HOLD ON to something that is stationary such as the leg of the table to support your body from shaking and wait until the shaking stops. When you are inside of the building, stay where you are until the shaking stops. Do not run outside and make sure you are far away from the things that might fall. After an earthquake, look around, look for a safe and open space and stay away from damaged areas. If you are trapped, do not move instead, use your phone to call for a help.
One of the most unforgettable earthquake incident is the one happened in Japan last March 11, 2011 where magnitude 9.0-9.1 hit the Pacific coast of Tõhoku, Japan. Thousands of people died on the said incident which was followed by a tsunami that washed out the entire city. Even the Philippines has victimized by this devastating earthquake particularly in Western Visayas. In the years – 1621, 1787, 1887, and 1948 many churches were destroyed and many lives were taken away by an earthquake that occurred here in Western Visayas.
Here are some of the active faults that can be found here in Western Visayas:
The WEST PANAY FAULT, which traverses from the provinces of Aklan through Capiz and ends in the town of San Joaquin, Iloilo. The towns near this fault are Lambunao, Janiuay, Maasin, Alimodian, Tubungan, Leon, Igbaras, Miag-ao, and San Joaquin in Iloilo; Ibajay, Malinao, and Madalag in Aklan; Pandan in Antique; and Jamindan and Tapaz in Capiz. Meanwhile, the Negros Trench and Southern end of the Manila trench can cause a tsunami that can affect the coastal areas of the region. Other active fault in the region are Antique-Toblas fault and Central Negros Fault.
Earthquake cannot be detected and disaster such this cannot be avoided. Be ready all the time. Troubles may come but just put in mind, BE RESILIENT. KJLT