Environment Technology

Environment Technology

Earth 4 Energy, Review In Depth

Posted by admin on April 9, 2013 in Renewable Energy with 2 Comments

Renewable Energy helps to reduce electricity bills and to protect the environment, but not cheap to start. Usually, it takes $ 1,000 to purchase and to install a renewable energy source, but no more. Now, with this guide Earth 4 Energy, you can build wind turbines or solar panels to generate electricity in your home for less than $ 200, with parts can be purchased in your city.

This guide teaches you, step by step to build a home wind turbine and solar panel. In doing so, you can save up to 80% to 100% of your electricity bill. Building your own green energy source is not difficult when you have the right guide. We are building our fourth solar panel now and it’s really something you might call fun with this guide “Earth 4 Energy”.

Earth 4 Energy guide created by Michael Harvey, a renewable energy enthusiast shows you how to easily make your own energy to power at home, either solar or wind. Get step by step, fully illustrated manual including videos to make your own solar panels and wind turbines. This is very comprehensive manual with many other boards, including a complete list of supplies, forms of tax cuts, and even how to store unused energy for later.

You will be able to reduce your electricity bill by 80% or even eliminate it completely. This manual even show you how to load your power company. You can get all the supplies for your solar power system or wind energy system for $ 200. This have been found one of the most advanced guides on the market, that is a model for anyone who wants to go green and save a lot of money on energy and environmental protection simultaneously.


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  1. Prince DannyApril 9, 2013 - 10:25 pm #1

    How the depth of Hypocenter is determined?
    By watching the news on CNN of Japan Earthquake since when it happened, I started this morning searching on the internet for information about Earthquakes.
    I just found out how the Epicenter and Hypocenter determined (calculated), but I could not figure out as yet how the depth of Hypocenter is determined (calculated)?
    Hope you could help me out!

    Thank you!

    Me heart goes out for the peoples of:
    * Japans – earthquake victims;
    * Libyans – fighting for their freedom.
    Lets us all pray for them because today it is them and tomorrow it could be us!

  2. DzhonApril 10, 2013 - 3:27 am #2

    Hypocenter – quake’s focus, focal depth, or underground point of origin

    The calculations used to determine the location of earthquake hypocenters are quite complex. The entire mathematical formulation of linear regression used to locate an earthquake’s hypocenter is explained here:

    Page 1

    Page 2

    An earthquake’s hypocenter is the position at the focal depth below the epicenter where the strain energy stored in the rock is first released, marking the point where the fault begins to rupture.

    The focal depth can be calculated from measurements based on seismic wave phenomena. As with all wave phenomena in physics, there is uncertainty in such measurements that grows with the wavelength so the focal depth of the source of these long-wavelength (low frequency) waves is difficult to determine exactly. Very strong earthquakes radiate a large fraction of their released energy in seismic waves with very long wavelengths and therefore a stronger earthquake involves the release of energy from a larger mass of rock.

    Begin by reviewing your understanding of earthquake transmission mechanics. Vibrations called seismic waves transmit an earthquake. These waves travel outward in all directions from the quake’s focus, or underground point of origin. Like ripples from a stone dropped in a pond, the waves spread concentrically. Some travel through Earth’s interior, while others move along its surface.

    The first vibrations to reach a seismograph are compressional waves are known as primary, or P, waves. The P waves move through rock by elastically compressing and expanding the rock itself just like sound waves travelling through air. The other kind of waves is known as the secondary, or S, waves, also known as shear waves. S waves move through rock with an up-and-down motion. When P and S waves reach the surface, some of them are transformed into a third type of seismic wave the surface waves.

    Although P waves pass readily through solids and fluids, S waves can move
    only through solids. In general, the harder and denser the rock, the faster both types of waves travel through it. P waves take about 19 minutes to reach the opposite side of Earth. S waves are stopped at the boundary of Earth’s liquid outer core, where their energy is probably converted to heat. Surface waves are the slowest and most damaging of all; they may circle the globe several times before abating.

    To find the location of an earthquake’s focus scientists measure the time delay
    between the arrival of P waves and S waves using the seismographs inside recording stations. The S-P time can be as short as a few seconds or as long as several minutes, but it always reveals the distance from the recording station to the epicenter, the point on Earth’s surface directly above the focus. However, knowing the distance to the epicenter does not locate the earthquake’s true origin. To zero in on this site, seismologists compute the epicenter’s distance from at least three recording stations. A circle is then drawn around each station, with the circle’s radius equaling the station’s distance from the epicenter. The focus of an earthquake lies in the area where the circles overlap.

    – Note that focal depth is not determined in this method – it only establishes the epicenter and origin times. This information is further processed to determine the location of the earthquake hypocenter here:

    References :

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