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.earhquakes are measured using observations by seismometers. The magnitude of an earthquake and its intensity is recorded on a numerikal scale. On this scale, 3 or less is hardly noticeable. Earthquakes with magnitude of more 6.5 can cause heavy damage (Earth scence. 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 regio is partly 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. Damege and loss of life incurres during earthquake is due to falling buildings and flying glass and objects. In certain areas, an earthquake can cause tsunami or a chain of fast moving waves in the ocean that ripple outward from earthquakes epicenter towards coastal area causing surmountable damage (http//:www.USGS.Org). on an average, 1,000 earthquakes with intensities of5.0 or greater are recorded each year.
As Indonesia is situate in the ‘’Ring of fire’’, it is more prone to earthquakes. According to united states geological survey (USGS, earthquake hazards program), till now Indonesia has witnessed five great earthquakes with the magnitude ranging from 8.5 to 9.1 these earthquakes caused major destruction in the places they occurred. One of the major earthquakes that hit indinesia was ‘’ 2004 indian ocean tsunami ‘’. It was the deadliest natural disaster in the area. Its magnitude was 9.1-9.3. heavy loss of the human lives was witnessed and damage was felt as far as east coast of Africa (http//:www.USGS.Ogr).
Earthquakes have been a source of terror to people since ancient times, but only for the last few hunderd years serious attempts have been made to understand them. Many methods have been developed to predict earthquakes despite all the research efforts by seimologists. The prediction cannot be made to a specific day or month. In future perhaps sientists will be able to predict earthquakes exactly but for now science has yet to provide answers.

Hasil (Bahasa Indonesia) 1:

Gempa bumiKebanyakan bahaya mematikan alamiGempa bumi. Yang paling bahaya mematikan alami. Menyerang tanpa peringatan sebelumnya, meninggalkan bencana di belakang mereka dengan kerugian yang mengerikan dari kehidupan manusia serta kerugian ekonomi.Secara teknis, gempa bumi (juga dikenal sebagai tremor, gempa atau gempa) adalah semacam getaran melalui kerak bumi. Gerakan-gerakan ini kuat memicu pelepasan cepat dari energi yang menciptakan gelombang seismik yang perjalanan melalui bumi. Gempa bumi biasanya singkat, tetapi mungkin mengulangi selama jangka panjang waktu (ilmu bumi 2001).Gempa bumi diklasifikasikan sebagai besar dan kecil. Gempa bumi besar biasanya mulai dengan getaran sedikit tapi dengan cepat mengambil bentuk kekerasan shock. Getaran dari gempa besar yang berlangsung selama beberapa hari, dikenal sebagai gempa susulan. Gempa bumi kecil yang biasanya sedikit getaran dan tidak menyebabkan banyak kerusakan. Gempa bumi besar dikenal untuk mencatat bangunan dan menyebabkan kematian dan cedera (richter 1935). Menurut beberapa statictics, mungkin ada rata-rata 500.000 gempa bumi setiap tahun tetapi hanya sekitar 100.000 dapat dirasakan dan sekitar 100 atau begitu dapat menyebabkan kerusakan setiap tahun.Studi tentang gempa bumi disebut seismology.seismology studi frekuensi, jenis dan ukuran earthquakes.earhquakes yang diukur dengan menggunakan pengamatan oleh seismometers. Besarnya gempa bumi dan intensitas yang dicatatkan pada skala numerikal. Pada skala ini, 3 atau kurang ini hampir tidak terlihat. Gempa bumi dengan magnitudo 6.5 lain dapat menyebabkan kerusakan berat (bumi scence. 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 regio is partly 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. Damege and loss of life incurres during earthquake is due to falling buildings and flying glass and objects. In certain areas, an earthquake can cause tsunami or a chain of fast moving waves in the ocean that ripple outward from earthquakes epicenter towards coastal area causing surmountable damage (http//:www.USGS.Org). on an average, 1,000 earthquakes with intensities of5.0 or greater are recorded each year.As Indonesia is situate in the ‘’Ring of fire’’, it is more prone to earthquakes. According to united states geological survey (USGS, earthquake hazards program), till now Indonesia has witnessed five great earthquakes with the magnitude ranging from 8.5 to 9.1 these earthquakes caused major destruction in the places they occurred. One of the major earthquakes that hit indinesia was ‘’ 2004 indian ocean tsunami ‘’. It was the deadliest natural disaster in the area. Its magnitude was 9.1-9.3. heavy loss of the human lives was witnessed and damage was felt as far as east coast of Africa (http//:www.USGS.Ogr).Earthquakes have been a source of terror to people since ancient times, but only for the last few hunderd years serious attempts have been made to understand them. Many methods have been developed to predict earthquakes despite all the research efforts by seimologists. The prediction cannot be made to a specific day or month. In future perhaps sientists will be able to predict earthquakes exactly but for now science has yet to provide answers.