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Where do shallow-focus earthquakes occur?
Shallow-focus earthquakes occur within the upper 70 kilometers of the Earth's crust. These earthquakes are typically more destructive than deep-focus earthquakes because they are closer to the Earth's surface. Shallow-focus earthquakes are often associated with tectonic plate boundaries and faults.
Is a deep earthquake worse then a shallow earthquake?
It depends, but 'shallow' (refering to the 'focus') earthquakes hit, usally, with a bigger force. This is because if the focus is closer to the surface of the earth (like in the Kobe earthquake) then the siesmic waves do not have as far to travel to reach the surface. But you can still have a deep focus with a big impact: if the siesmic waves are more powerful.
What causes more damage shallow or deep focus earthquakes?
Shallow-focus earthquakes cause more damage than deep-focus earthquakes. This is because shallow-focus earthquakes originate closer to the Earth's surface, which allows the energy to be more concentrated and lead to stronger shaking and more destruction of structures. Deep-focus earthquakes, occurring deeper underground, tend to have their energy dissipate before reaching the surface.
Which causes more damage a shallow focus or deep focus?
Typically, a shallow focus earthquake will cause more damage than a deep focus earthquake. Shallow focus implies the source of the earthquake is near to the surface, so the waves will lose lesser energy than the deep focus earthquake waves while travelling through the Earth. But it depends on other factors too such as local stratigraphy, and subsurface conditions.
Most shallow focus earthquakes are found along?
Most shallow focus earthquakes are found along tectonic plate boundaries, specifically at subduction zones where one plate is being forced beneath another. This type of interaction can cause a sudden release of energy, resulting in a shallow-focus earthquake. Other common locations for shallow focus earthquakes include transform boundaries and continental rift zones.
Why was the earthquake in japan 8000 times stronger than the one that hit New Zealand?
The Richter magnitude is an estimate of the energy released at the focus, the point where the quake arose. Your experience will depend on depth of the quake, magnitude, distance, intervening soil types, and very importantly, the soil structure at your site. There is a 30-fold increase in each whole number of Richter magnitude. A force 6 had 30 times the energy (at focus) of a force 5. The recent Japanese quake was shallow, and not too far distant from populated centres.
How can one determine the order of magnitude of a given quantity?
To determine the order of magnitude of a given quantity, you can look at the number of digits in the quantity and focus on the most significant digit. The order of magnitude is typically represented as a power of 10 that is closest to the value of the quantity. For example, if the quantity is 450, the order of magnitude would be 102 or 100.
What was the magnitude of the earth quake that hit haiti?
7.0. That is STRONG, plus the focus was near earth's surface, so it felt stronger than an earthquake with a 7.0 magnitude but with a focus closer to the middle of the earth would feel.
What is used to express the amount of energy released from the focus of an earthquake?
magnitude.
Which measure of an earthquake is independent of a distance from the focus?
Richter Scale
What fours factors affect the intensity of an earthquake?
epicenter. focus. magnitude. and density
Where do shallow-focus earthquakes of the occur relative to ocean trenches?
within or adjacent to trenches
