Great Hanshin-Awaji Earthquake and the difference between East

写真 Northeastern Pacific Ocean off the coast earthquake in March 2011 (East Earthquake) occurred.

Kobe earthquake in January 1996 (the Great Hanshin Earthquake) occurred.

These two earthquakes (disaster) where I would like to explain about the difference.



Difference in mechanism

Northeastern Pacific Ocean off the coast when an earthquake

Oki earthquake in the Northeast Pacific Ocean earthquake in Pacific Ocean plate and the North American plate boundaries, 200km around the Pacific Ocean between the width of the northeastern Kanto region, a length of about Had a source region over up to 500km.

This is the largest earthquake in recorded history, Japan was the fourth major large earthquakes in the world since 1900. And Tsunami, Tsunami was to record the height of 40.5m. Such an earthquake will happen or how to.

First, it caught the edge of the plate subduction in the trench when the land of the sea plates. Eventually, the end plate of the land involved jumped to rebound, a giant Causes earthquakes. Is called a subduction earthquake bounce caused by this earthquake.

This type of earthquake shaking on the side (commonly called rolling) so many great earthquakes larger, sometimes even violent shaking that far from the epicenter location. Swing is often longer than that for the following types of earthquakes.

図j-1


















If Kobe Earthquake

Issued a devastating earthquake centered in southern Hyogo Prefecture, Japan was the first earthquake occurred just below the big city.

Sea plate motion and plate put pressure on land also incurs distortion of inland bedrock.
The larger the distortion caused by a weak internal corruption in the earth of the interior plate.
Thus earthquakes are large compared to the trench type great earthquakes are small, such as violent shaking from the bottom to push up local (commonly referred to as pitch) cause. If you are a shallow earthquake and brings a lot of damage just below the city.

図2









Such earthquakes have mainly the following five types.
① by near-surface active faults
②Plate boundary earthquake Philippine Sea plate along the upper surface (low-angle reverse fault).
③Internal destruction of the Philippine Sea Plate
④Top plate along the plate boundary earthquake in the Pacific Ocean (low-angle reverse fault).
⑤Plate earthquakes in the Pacific Ocean by internal fracture
The Kobe earthquake happened ①.


Differences in damage

写真 If the earthquake East

15,842 human deaths.
The number of people missing ... 3,475 (as of 12/20)

【概要】
And East Japan earthquake, tsunami caused by the earthquake and its northeastern Pacific Ocean off the coast took place on 11 March 2011, and caused by the aftershock, is that a large earthquake.
In addition to the tsunami, the earthquake and liquefaction, ground subsidence, such as by dam failure can cause harm under the Kanto and Tohoku vast range, variety has been severed life-line Other. 　↑Wikipediaより引用(URL)
　 In the Great Hanshin Earthquake is the main cause of death was crushed to death, whereas, drowned by the tsunami were occupied by more than 90%.
Buildings do not collapse too much in relation to the period of modulation, a single person killed in Kurihara, Miyagi Prefecture recorded the maximum seismic intensity 7 was issued.
Wikipediaを参考にしました(URL) 　詳しい引用情報はこちら




写真 When the Great Hanshin-Awaji

死者数…6,482人

【概要】
阪Awaji and God is that large-scale earthquake occurred in the Kobe earthquake on January 17, 1995.
Because it was early morning in winter, low utilization of public transport road, that road was a night-time population of less, been kept out of harm's home town.
Of the deaths, about 80% houses have collapsed and died and is buried under the house
Based on the 1981 Miyagi-oki Earthquake in 1978 (1981) Building was constructed in accordance with the Building Standards Law was revised, but also less damage, such as house building wooden roof tiles devastated Japan is out. 　　↑Wikipediaより引用(URL)
Deceased was receiving intensive aging wooden roof tiles, building codes were amended.
Wikipediaを参考にしました(URL) 　詳しい引用情報はこちら




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