In order to understand the impact of this earthquake, though, we need to go beyond the live reports and graphic photographs, and ask why this earthquake in this place has been so devastating. Donald Rallis June 16, 2013 Yes, but how can they make more money? Why are they poor in the first place? Brianna D'Agata June 23, 2013 Many parts of this blog struck me hard
Earthquakes - average, low, world, daily, high, days, Why earthquakes occur, Measuring an earthquake, Understanding earthquakeswhy they are always a surprise
This earthquake belt was responsible for 70,000 deaths in Peru in May 1970, and 65 deaths and one billion dollars of damage in California in February 1971. Magnitude expresses the amount of energy released by an earthquake as determined by measuring the amplitudes produced on standardized recording instruments
Explaining Earthquakes : QUEST
Seismologist then found that the Richter magnitude and other magnitudes related just to maximum motions of different parts of the seismic wave did not adequately measure the size of very large earthquakes. How did they know that it was an earthquake? What did they feel? What did they hear? Have students make a list of questions they have about earthquakes
Earthquakes are common events on the Earth, with around 50,000 occurring every year around the globe, mainly on the plate margins (see a map of latest British Isles Earthquakes). They also occur at conservative margins, such as the San Andreas Fault line, where the North American plate and Pacific plate are grinding past one another
Is The New Madrid Fault Earthquake Zone Coming To Life?
Lynne If I were to just guess.I would have picked gas dispersants birds are often seen drinking together same location, but just last week more dead birds found in Italy and another european country.to my knowlege no gas dispersants there they are banned in that country so it really is a mystery, or omen .Its interesting I keep looking to see if any news , but nothing, we are back to chasing octo mom on TV. I also read that there was alot of methane released from the gusher, and had it not been stopped (ever wonder why that dropped of the MSM?)it could potentially cause a Tsumani wiping out the entire gulf coast
The mid-century hero of Plate Tectonics was Harry Hess, whose magnetometer data collected near the midocean ridges revealed mirror-image stripes of reversing magnetic orientation imprinted on oceanic crust as it was extruded from the spreading centers and moved away from them. So Plate Tectonics indeed holds that there was convergence of continents around the Pacific, but asserts that the convergences occurred at different times
The Golden Gate Bridge: Structures the size of the Golden Gate, such as other large bridges or off-shore platforms, typically have a very long natural period of vibration. The Northridge earthquake, which was a M6.7, had intensities above VII, so a M7.9 certainly would have shaking strong enough to knock someone off of their bicycle - especially when buildings right next to the bicyclist are collapsing
Earthquakes :: essays research papers
The Company makes no representations about the accuracy, reliability, completeness, or timeliness of the Material or about the results to be obtained from using the Material. If a hot spot is directly below a thinned crust, then the magma in the hot spot may produce too much pressure to be held by the thinner weakened crust and if this happens, the magma can penetrate the lithosphere, and eventually erupt on the surface
As the Richter scale does not adequately differentiate between the largest earthquakes, a new "moment magnitude" scale is being used by seismologists to provide a better measure. Wallace The presence of the San Andreas fault was brought dramatically to world attention on April 18, 1906, when sudden displacement along the fault produced the great San Francisco earthquake and fire
The 1994 Northridge earthquake was caused by a blind thrust fault.What causes an earthquake? Earthquakes occur when the two sides of a fault slip suddenly against each other. Sometimes one block of the crust moves up while the other moves down, sometimes they move horizontally in opposite directions (that's what's happening with the San Andreas Fault; Los Angeles is creeping closer to San Francisco)
Earthquake!
Was this the quake they had waited for? Could somebody have accurately predicted it? Could somebody have actually stopped it? In 1995, shortly before sunrise, the city of Kobe, Japan was violently rocked awake by a slightly larger earthquake. You might begin exploring more of geology by visiting a museum or a university geology department, or checking your local library, or writing a letter to a geologist near you
Plate Tectonics
He proposed that prior to about 200 million years ago all of the continents formed one large land mass that he called Pangea (see figures on pages 56 to 59 in your text). For each of the following types of plate boundary, describe exactly what is present and what happens at the boundary: (a) divergent boundary, (b) convergent boundary, (c) transform boundary
REV Lesson Plan 3 (Using earthquake depths as evidence for a subduction zone)
What type of plate boundary does the one on the west edge of South America represent? If you could follow a point on the Nazca Plate at the surface where it meets the South American Plate, where would it be in 1 million years? (What is happening to the Nazca plate over time?) Label the plates on your graph. Content Standard A: Scientific inquiry: As a result of activities, all students should develop abilities necessary to do scientific inquiry and understandings about scientific inquiry
At this rate, Los Angeles and San Francisco will one day (about 15 million years from now) be next-door neighbors, and in an additional 70 million years, Los Angeles residents will find themselves with an Alaska zip code! FICTION: An earthquake on the San Andreas fault can cause a large tsunami. In California, earthquakes are almost all in the top 15 miles of the crust, except in northern California along the Cascadia Subduction Zone, which extends into Oregon, Washington, and British Columbia
But prediction success rate is low with many false alarms, so, unfortunately tragedies continue to happen, even though scientists do their best, despite the uncertainties of the situation, to make accurate predictions. At region (2) on Fig 12.) which could be the Mid-Atlantic Ridge, the magma welling up and breaking through is like long intermittent volcano with lots of volcanic vents from which lava flows originate
2009 Earthquake Probability Mapping
This web site was designed to display earthquake probabilities that are computed from the source model of the 2008 USGS-National Seismic Hazard Mapping Project (NSHMP) update. postal zip code Time Span Number of years to consider (integer) Magnitude 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 9.0 9.1 9.2 Minimum magnitude to consider Report Text Report Yes No Generate an ASCII text report of probabilities Distance In km (integer)
Earthquake Hazards 101 - the Basics
Probability from the engineering point of view Rather than start with the idea of probability, consider approaching the issue from this direction: A structure is designed to resist earthquake ground motion having a particular value. Attenuation Relations An attenuation relation is an equation or a table that describes how earthquake ground motion decreases as the distance to the earthquake increases
EARTHQUAKES
When a major earthquake strikes, the ground shakes violently, and buildings and bridges topple.As the plates slowly shift, rocks are put under pressure. The rocks may be shifted only a few centimetres, but over millions of years, this can add up to hundreds of kilometres of movement sideways, and up to 30 km (19 miles) of vertical movement.NORMAL DIP-SLIP FAULTThe rocks along a fault may move up or down, sideways or diagonally, depending on the angle of the fault plane
Earth Floor: Plate Tectonics
The theory states that Earth's outermost layer, the lithosphere, is broken into 7 large, rigid pieces called plates: the African, North American, South American, Eurasian, Australian, Antarctic, and Pacific plates. The plates are all moving in different directions and at different speeds (from 2 cm to 10 cm per year--about the speed at which your fingernails grow) in relationship to each other
What we have in mind is, ideally, to have dozens of these, up and down the coastline, so that all of the low-lying communities with tsunami hazards have these to protect their people. NARRATOR: The last lethal quake on the San Andreas fault system was the 1994 Northridge earthquake, which killed over 60 people and caused 20 billion dollars of damage
What Causes Earthquakes?
Of late, there have been many natural disasters that can be associated with earthquakes, such as the Tsunami that hit the shores of India and Southeast Asia in 2004, and caused total annihilation. According to expert studies, this has an effect on the surrounding crustal portions, leading to earthquakes, especially if structural weaknesses like faults and dikes are present in the lithology
No comments:
Post a Comment