All  Engineering and Technology Information in One Place.....


About This Site

Sections  Directory

Search This Site

Privacy Policy

For Discussion of These Topics + Visit  the New Engitek Science and Technology Forum


Tired of looking for a job?, Cansado de buscar trabajo?


Semiconductors Devices


Electronics Technology Information Sites


Science and Tech Forum


Electronics Engineering Information by Categories


Engineering and Science Software


Free Science-Tek Magazines and Publications


Regulatory Offices and Agencies and Standards


Patents  Information


Prototypes Developing Houses, Devices and Tools


IC’s Foundries  and IC Development Services


Certification Labs


Operation Manuals


Physics Units Converter Calculators

Convert any type of unit into any other of any system or scale


Alternative Energies Tutorials:


Ocean Energy

Wind Energy

Solar Energy



Lean Manufacturing Tutorials:

The Seven Causes of Waste

The 5S

The 5 Why’s

The 4 M’s +1

Cause Effect / Fish Diagram  

The 4W’s +H+W



Project Charter Example

Value Stream Mapping Introduction and Icons

Current or Present State Map

Future Sate Mapping

Cell Production

Kanban Production System




Electronics and Electromechanical Distributors


Jobs Portal

Easily find your dream Job


Technology News


Science News


Business News


Electronics, RF and Communication Concepts

Rsistors and capacitors colors code

The Logarithm

The bel, decibel , the dbm and the dbmv

Electrical noise definition and Thermal noise

Signal to noise ratio


Lowest Prices for Solar Cells

Best Solar Energy Books

Lowest price Solar Panels

Wind Turbines and Parts

Best Wind Energy Books

Search this site

Para nuestros amigos de habla hispana, los invitamos a visitar el portal tecnológico en español:



Basic Earthquake Glossary, Part 1







Basic Earthquake Glossary:

By Engitek.com



Aftershocks are smaller earthquakes that occur after the main or larger one. Normally after shocks are a sequence of minor earthquakes that can be composed of only few or several hundred ones. Aftershocks can be repeated several times during minutes, hours, weeks, months and even years after a main earthquake event.  



Also known as magnitude is in how strong an earthquake was and it is normally referred to the Richter scale.







Body Waves

Body waves are earthquake waves that travel in the interior of the earth, the most important body waves are the P and S waves called in this manner because the way they move, each one has a different effect on how they shake the ground.  


Blind Thrust Fault

A blind thrust fault is a fault hidden under the surface of the earth, In other words this rupture is not visible in the surface, therefore could be more dangerous than the obviously visible faults because not always are properly detected and known.











                      Blind Thrust Faults (Hidden Fault)




Is the deeper or innermost  part of the earth, the outside diameter reach about 3000 miles below earth’s surface and it is primarily made of liquid metal mostly iron.

The central or inner core is made of solid metal also mostly made of iron.

















Earth Crust

Is the skin of the earth and has a thickness of about ten to more than 60 Km depending of the world geographical location. In this upper layer is were most earthquakes are produced due to it fragility


Epicenter is the direct vertical location on the surface of the earth where the earthquake focus occurred.


















Solid Core

Liquid Core

A=Earth diameter from poles =12,713 Km

B=Liquid core = 3059 Km

C=Inner Core = 804 Km

Compression Stress

Is when two earth plates collide or when the earth crust is compressed at one point by opposite forces

Tension Stress

  Is when the earth crust is pulled apart

Shear Stress

Is when two earth plates are pulled on opposite directions



Continue on next page >>


Earthquakes Sections  Index