What causes earthquakes facts – We often hear quake but very rarely we see there are several kinds of earthquakes we have experienced. All of the quake did cause the phenomenon in the form of wobble. But not all of wobble caused by the same thing.
“Oh cool, Pakdhe has begun to theorize, not only tells phenomenon”
“While not much of the natural phenomena theory yes we first Thole story”
In theory there is some kind of earthquake views of how to classify it. Can be seen from the genesis of earthquake occurrence, the magnitude of its power, can also be seen from the phenomenon.
Classification of earthquake genesis
There are five (5) types of earthquakes that can be distinguished by the occurrence, namely:
- Tectonic earthquake;
- Volcanic Earthquake;
- Earthquake Ruins;
- Earthquake fallout;
- Artificial Earthquake
- Now we see the one simple huh?
Kaan tectonic already know? Yes the movement of the plates or crust. Etc. Each layer has a hardness and density of which differ from one another. The earth’s crust has shifted as a result of convection currents that occur in the earth. Because the friction between these plates causes earthquakes, this most often occurs during this time.
This tentusaja need to be explained further, because this earthquake pasling common and is one of the most destructive earthquakes assessed.
As its name suggests volcanic earthquakes or volcanic earthquake is the earthquake caused by movement or activity of magma inside the volcano. This earthquake can occur before and during volcanic eruptions. Vibrations can sometimes be perceived by humans and animals around the volcano is located. Estimates volcanic eruption is marked by frequent occurrence of volcanic earthquake vibrations.
Earthquake debris or Terban an earthquake that happened because the soil or rock debris. Its slopes or steep coast has great potential energy to collapse, also occurred in the area due to the collapse of the mine or tunnel wall in the underground mines that can cause vibrations in the vicinity of the ruins, but the impact is not so dangerous. Quite the harmful effects are due to deposition of rocks or landslide itself.
Imagine if a large rock slide as explained here : Looking at the types of avalanches with video View large rock falls genius even this will cause vibrations strong enough. Even-swara swara glung-borax in the south of Yogyakarta been rumored due to the collapse of underground caverns. Please read here Vibration Terri: Crawls, volcanic or tectonic?
The quake fallout
Well alleged large meteor impact in Indonesia has also been at here: Hunting Meteor Crater (Geo-Circle) in Indonesia
An underground nuclear test explosions or sea can cause vibration of the earth that can be recorded by seismographs all over the surface of the earth depends on the force of the blast, while a blast of dynamite beneath the earth’s surface can also cause vibration but the vibration is very local effect.
One of the benefits of artificial earthquake vibrations are in oil exploration with a technique called seismic exploration.
So even during oscillation and vibration is always considered to be damaging, but if people are able to think that this is precisely the vibration can be used to study the Earth itself. theory yes like a doctor who listened to the vibrations that exist in the stomach.
Well above the types of earthquake seen from the genesis of the occurrence or formation.
Kalisifikasi magnitude of an earthquake,
Based on the strength or magnitude (M), distinguishes USGS earthquake can be distinguished:
- 0.0-3.0: micro earthquake
- 3.0-3.9: minor earthquake
- 4.0-4.9: minor earthquake
- 5.0-5.9: moderate earthquake
- 6.0-6.9: strong quake
- 7.0-7.9: major earthquake
- 8.0 and greater: a very strong earthquake
Based on the depth of the epicenter
Based on the depth (h), the earthquake was listed above:
Shallow earthquakes between 0 and 70 km deep; intermediate earthquake, 70-300 km deep, and earthquakes in, 300-700 km deep. In general, the term epicenter in ( deep-focus Earthquakes ) is used to earthquakes, its more than 70 km. All the earthquakes deeper than 70 km are common in the Earth’s mantle, not only in only.
Remember the Earth’s crust has a depth of only about 60 Km away.
Other terms in quake
is vibration or earthquakes smaller happened before the big earthquake.
- Main shock
main quake that an earthquake is often reported when they occur.
This earthquake is known as aftershocks. The main earthquake (Main shock) who has the power over 6M usually have aftershocks.
- Earthquake Swarm
stand of the earthquake are earthquakes that occur at a particular location. Often associated with volcanism.
- Primary and Secondary Quake
Quake is a primary coming earthquake shakes first because these vibrations have the greatest velocity. While the secondary earthquake is a wobble or vibration that comes afterwards because it has a lower velocity.
With the proper classification we will know how the character of each of these earthquakes.
Well how about the kinds of earthquakes are scattered in Indonesia? Wait for the next myth.