Earthquakesthe most deadly natural

Earthquakes
the most deadly natural hazards

Earthquakes. Being the most deadly natural hazards. Strike without any prior warning, leaving catastrophe in their wake with terrible loss of human lives as well as economic loss.

Technically, an earthquakes (also known as tremor, quake or temblor) is a kind of vibration through earth's crust. These powerful movements trigger a rapid release of energy that creates seismic waves that travel through the earth. Earthquakes are usually brief, but may repeat over a long period of time(earth science 2001).

Earthquakes are classified as large and small. Large earthquakes usually begin with slight tremors but rapidly take form of violent shock. The vibrations from a large earthquake last for few days known as aftershocks. Small earthquakes are usually slight tremors and do not cause much damage. Large earthquakes are known to take down buildings and cause death and injury (richter 1935). According to some statictics, there may be an average of 500,000 earthquakes every year but only about 100,000 can be felt and about 100 or so can cause damage each year.
The study of earthquakes is called seismology. Seismology studies the
frequency, type and size of earthquakes. Earthquakes are measured using
observations by seismometers. The magnitude of an earthquake and its intensity
is recorded on a numerical scale known as Richter scale. On this scale, 3 or less is
hardly noticeable. Earthquakes with magnitude of more than 6.5 can cause heavy
damage (Earth Science. 2001).
The effects of an earthquake are strongest in the area which is near its
epicenter. The extent of the earthquake vibration and further damage to the
region is partly dependent on the features of the ground. The worst possible
damage occurs in the densely populated areas where structures are not built to
withstand intense shaking. Damage and loss of life incurred during earthquake is
due to falling buildings and flying glass and objects. In certain areas, an earthquake
can cause mudslides that can bury areas under it. Powerful submarine
earthquakes cause tsunami or a chain of fast moving waves in the ocean that
ripple outward from earthquake epicenter towards coastal areas causing
surmountable damage (http\: www.USGS.Org). On an average, 1,000
earthquakes with intensities of 5.0 or greater are recorded each year.

Hasil (Bahasa Indonesia) 1:

Earthquakesthe most deadly natural hazardsEarthquakes. Being the most deadly natural hazards. Strike without any prior warning, leaving catastrophe in their wake with terrible loss of human lives as well as economic loss.Technically, an earthquakes (also known as tremor, quake or temblor) is a kind of vibration through earth's crust. These powerful movements trigger a rapid release of energy that creates seismic waves that travel through the earth. Earthquakes are usually brief, but may repeat over a long period of time(earth science 2001).Earthquakes are classified as large and small. Large earthquakes usually begin with slight tremors but rapidly take form of violent shock. The vibrations from a large earthquake last for few days known as aftershocks. Small earthquakes are usually slight tremors and do not cause much damage. Large earthquakes are known to take down buildings and cause death and injury (richter 1935). According to some statictics, there may be an average of 500,000 earthquakes every year but only about 100,000 can be felt and about 100 or so can cause damage each year.The study of earthquakes is called seismology. Seismology studies the frequency, type and size of earthquakes. Earthquakes are measured using observations by seismometers. The magnitude of an earthquake and its intensity is recorded on a numerical scale known as Richter scale. On this scale, 3 or less is hampir tidak terlihat. Gempa bumi dengan magnitudo lebih dari 6,5 dapat menyebabkan berat kerusakan (ilmu bumi. 2001). Efek dari gempa bumi terkuat di daerah yang dekat dengan Pusat gempa. Sejauh mana getaran gempa bumi dan kerusakan daerah ini sebagian bergantung pada fitur dari tanah. Kemungkinan terburuk kerusakan terjadi di wilayah padat yang mana struktur tidak dibangun untuk menahan gemetar intens. Kerusakan dan kerugian kehidupan yang dikeluarkan selama gempa karena jatuh bangunan dan terbang kaca dan benda-benda. Di area tertentu, gempa bumi dapat menyebabkan tanah longsor yang dapat mengubur daerah-daerah di bawah ini. Kapal selam yang kuat gempa bumi menyebabkan tsunami atau rantai gelombang bergerak cepat di laut yang riak ke luar dari Episentrum gempa menuju daerah pantai menyebabkan surmountable kerusakan (http\: www.USGS.Org). Pada rata-rata, 1.000 gempa bumi dengan intensitas 5.0 atau lebih besar tercatat setiap tahun.