How Earthquakes Happen Earthquake i

How Earthquakes Happen


Earthquake is one of the most destroying natural disasters. Unluckily it often happens in several regions. Recently a horrible earthquake has shaken West Sumatra. It has brought great damages. Why did it occur? Do you know how an earthquake happens?

Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves. It make the ground shake. When two blocks of rock or two plates are rubbing against each other, they stick a little. They don't just slide smoothly. The rocks are still pushing against each other, but not moving. After a while, the rocks break because of all the pressure that's built up. When the rocks break, the earthquake occurs.

During the earthquake and afterward, the plates or blocks of rock start moving, and they continue to move until they get stuck again. The spot underground where the rock breaks is called the focus of the earthquake. The place right above the focus is called the epicenter of the earthquake.

Hasil (Bahasa Indonesia) 2:

Bagaimana Gempa Bumi Terjadi Gempa adalah salah satu bencana alam yang paling merusak. Sayangnya sering terjadi di beberapa daerah. Baru-baru ini gempa yang mengerikan telah mengguncang Sumatera Barat. Ini telah membawa kerusakan yang besar. Mengapa hal itu terjadi? Apakah Anda tahu bagaimana terjadi gempa? Gempa bumi biasanya disebabkan ketika underground batu tiba-tiba pecah di sepanjang kesalahan. Rilis ini tiba-tiba energi menyebabkan gelombang seismik. Ini membuat goyang tanah. Ketika dua blok batuan atau dua lempeng bergesekan satu sama lain, mereka tetap sedikit. Mereka tidak hanya meluncur lancar. Batuan masih mendorong satu sama lain, tetapi tidak bergerak. Setelah beberapa saat, batu pecah karena semua tekanan yang dibangun. Ketika batu pecah, gempa terjadi. Selama gempa bumi dan sesudahnya, piring atau blok batuan mulai bergerak, dan mereka terus bergerak sampai mereka terjebak lagi. Tempat bawah tanah di mana istirahat batu disebut fokus gempa. Tempat yang tepat di atas fokus disebut pusat gempa.