UNIVERSE

Earthquake

27. 12. 2011

Wikipedia

An earthquake (also known as a quake, tremor or temblor) is the result of a sudden release of energy in the Earth's crust that creates seismic waves. The seismicity, seismism or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time. Earthquakes are measured using observations from seismometers. The moment magnitude is the most common scale on which earthquakes larger than approximately 5 are reported for the entire globe. The more numerous earthquakes smaller than magnitude 5 reported by national seismological observatories are measured mostly on the local magnitude scale, also referred to as the Richter scale. These two scales are numerically similar over their range of validity. Magnitude 3 or lower earthquakes are mostly almost imperceptible and magnitude 7 and over potentially cause serious damage over large areas, depending on their depth. The largest earthquakes in historic times have been of magnitude slightly over 9, although there is no limit to the possible magnitude. The most recent large earthquake of magnitude 9.0 or larger was a 9.0 magnitude earthquake in Japan in 2011 (as of March 2011), and it was the largest Japanese earthquake since records began. Intensity of shaking is measured on the modified Mercalli scale. The shallower an earthquake, the more damage to structures it causes, all else being equal.

At the Earth's surface, earthquakes manifest themselves by shaking and sometimes displacement of the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami. Earthquakes can also trigger landslides, and occasionally volcanic activity.

In its most general sense, the word earthquake is used to describe any seismic event — whether natural or caused by humans — that generates seismic waves. Earthquakes are caused mostly by rupture of geological faults, but also by other events such as volcanic activity, landslides, mine blasts, and nuclear tests. An earthquake's point of initial rupture is called its focus or hypocenter. The epicenter is the point at ground level directly above the hypocenter.

Komentáre

Prehľad komentárov

best canadian pharmacy to buy viagra u451ky

(WillieHaf, 5. 9. 2024 23:07)

Cheers! Plenty of posts.

Online:	1
Celkom:	233923
Mesiac:	2037
Deň:	72

Menu

Earthquake

Komentáre

Prehľad komentárov

best canadian pharmacy to buy viagra u451ky

best drugstore bb cream x57uzg

good pharmacy x393aq

canadian pharmacy online cialis b899mo

what drugs are legal in canada x843ex

canadian pharmacy viagra 200mg y518dq

https://www.blogger.com/profile/08776646782725403045

sabiiborno is com

Bank any amount = up to 120% gratuity!

mostbetpk is net app

Nurturing Vigorous Procreant Relationships Between Men and Women

mostbetpk is net app

oxflox is com

oxflox is com

sertifikaciya iso 27001

sertifikaciya iso 27001

creators estas- fotos

creators estas- fotos

Exploring Healthy Sensual Relationships Between Men and Women

Nurturing Healthy Lustful Relationships Between Men and Women

Fotoalbum

Posledné fotografie

Vyhľadávanie

Archív

RSS

Štatistiky