Plates at our plants surface move because of the intense heat in the earth's core that causes molten rock in the molten layer to move. It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down. As the cooled material sinks down, it is warmed and rises again.
Scientists once thought that Earth's plates just surfed on top of the malte's giant convection cell's, but now scientists believe that plates help themselves move instead of just surfing along. Just like convection cells, plates have warmer, thinner parts that are more likely to rise, and cooler, denser parts that are more likely to sink.
What is the ring of fire edge?
The ring of fie is a ring of volcanoes are the Pacific Ocean that result room subduction of oceanic plates beneath lighter continental plates... A subduction zone is a place where one plate of oceanic lithosphere ( = the crust+ upper most mantle ) is shoved under another plate. The downing plate is always the oceanic one. All while it was oceanic plate it collected water-saturated and its uppermost few hundred metres got water saturated also. As it is shoved into the hotter matle the plate heats up and all this water and other volatiles boil off and migrate upwards though the overlying plate. This is why their is so many volcanoes around the Pacific rim.
Why do aftershocks happen afterwards?
Aftershocks are earthquakes that usually occur near the main shock. The stress on the main shock's fault changes during the main shock and most of the aftershocks occur on the same fault... The rate of aftershocks dies off quickly. The day after the main shock has half the aftershocks of the first day.
Why do earthquakes happen?
Earthquakes are usually caused when rocks underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that 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 catch on each other. 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 earthquakes occur. During the earthquake and after ward 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 ( on top of the ground) is called the epicenter of the earthquake.
What is the biggest earthquake that has happened in Christchurch?
- The largest was a 5.9-magnitude tremor which occurred just under two hours after the main earthquake
- A 5.3-magnitude aftershock on 16 of April, the largest for several weeks, caused further damage, including power cuts and several large rock falls.
How do we prevent from earthquake damage?
Earthquakes are natural disaster. That many people face every year. Unfortunately people often fail to prepare themselves or their homes from earthquake damage. Being prepared will save your time and money in the event of an earthquake.
1. Secure your belongings
2.Put latchs on cabinet doors and file cabines
3. Fasten your water heater and other appliances
4. Store hazardous materials in a sturdy place
5. Keep fire extinguishers
Well done Paris this is a great blog full of detailed information! You have researched this topic superbly.
ReplyDelete