how an earthquake epicenter is located. What is the minimum number of seismographs needed to locate an earthquake epicenter or focus? Why is this?
Archive for October, 2010
what are some advantages and disadvantages of the Richter scale and mercalli scale?
Oct 18, 2010 in
Earthquake Questions
Why would 1 scale be more benefical than the other
What problem would you have if you only had two locations to find an epicenter of an earthquake?
Oct 18, 2010 in
Earthquake Questions
An abrupt change in the speed of seismic waves is an indication that the?
Oct 18, 2010 in
Earthquake Questions
1.Seismic waves are colliding
2.shear wave has overtaken the compressional wave
3.Waves are going into a material with different properties
4.Waves are passing through material of the same density
Geography homework 
Thanks!
Was there seismic records as evidence of explosions prior to the collapse of WTC buildings ?
Oct 18, 2010 in
Earthquake Questions
I think that I read somewhere that there are graphs from somewhere that bear witness to a demolition but I’ve never seen that in the press.
why aren't we using wave and tidal generators ?
Oct 18, 2010 in
Tsunami
we have enough natural energy sources like wind , solar , wave and tidal power,
why aren’t we expanding the use of each one and combining them to take every home and business off the grid ?
If one earthquake has a magnitude of 5 on the richter scale and a second earthquake has a magnitude of 6 ….?
Oct 18, 2010 in
Earthquake Questions
If one earthquake has a magnitude of 5 on the richter scale and a second earthquake has a magnitude of 6 compare the intensities of the two earthquakes.
I know this has something to do with logarithims and the answer is 60 DB, I just dont know how to arrive at the answer, thanks.
How do seismic waves give scientists information about the internal structure of the Earth?
Oct 18, 2010 in
Earthquake Questions
Is there a fault line in New Jersey, that causes earthquakes? If so, what is the name of it?
Oct 18, 2010 in
Earthquake Questions
Important quick Survey on Natural hazards?
Oct 18, 2010 in
Earthquake Questions
Following Hurricane Katrina in 2005, there became a strong concern in this country
about our ability to cope with natural disasters. Due to the expensive cost of
acquiring detailed data about the hazard before, during and after the event, many
agencies are putting systems forth to allow citizens affected by the events to
contribute details about their surroundings. This may be in the form of data sent
over a mobile phone, or Internet connection to a PC. Please weigh in your thoughts
about using this system as a method of coping with natural disasters by taking this
brief survey.
* 1. Have you ever experienced a natural disaster?
Yes
No
2.
Which of the following hazards have you experienced?
Flood
Hurricane
Earthquake
Fire
Tornado
None
3.
About at what intensity did the disaster occur?
Very low
low
moderate
high
very high
* 4.
Did you have access to the internet following the event
Yes
No
5.
As the event passed, did you feel that adequate updates about the hazard were
provided to affected citizens?
Yes
No
* 6.
Following the event, did you feel coherent enough that you would be able to
communicate in detail about your surroundings?
Yes
No
* 7.
Have you ever contributed Geospatial Information about a hazard or extreme event
online? (Through Google Earth, USGS website, Weather channel, etc..)
Yes
No
* 8.
Do you have any experience using a GPS system?
Yes
No
* 9.
Do you feel that your community has an adequate emergency response system in
place for the onset of natural disasters?
Yes
No
10.
Do you feel that GIS and Remote Sensing is a very appropriate way of coping with a
natural disaster before, during and after the onset of a natural hazard
Yes
No
Many powerful earthquakes are followed later by less-powerful earthquakes called “aftershocks.”
If an earthquake measures 6 on the Richter scale and is followed by an aftershock that measures 4, how
many times more energy was released in the original earthquake as compared to the aftershock?
Following Hurricane Katrina in 2005, there became a strong concern in this country
about our ability to cope with natural disasters. Due to the expensive cost of
acquiring detailed data about the hazard before, during and after the event, many
agencies are putting systems forth to allow citizens affected by the events to
contribute details about their surroundings. This may be in the form of data sent
over a mobile phone, or Internet connection to a PC. Please weigh in your thoughts
about using this system as a method of coping with natural disasters by taking this
brief survey.
* 1. Have you ever experienced a natural disaster?
Yes
No
2.
Which of the following hazards have you experienced?
Flood
Hurricane
Earthquake
Fire
Tornado
None
3.
About at what intensity did the disaster occur?
Very low
low
moderate
high
very high
* 4.
Did you have access to the internet following the event
Yes
No
5.
As the event passed, did you feel that adequate updates about the hazard were
provided to affected citizens?
Yes
No
* 6.
Following the event, did you feel coherent enough that you would be able to
communicate in detail about your surroundings?
Yes
No
* 7.
Have you ever contributed Geospatial Information about a hazard or extreme event
online? (Through Google Earth, USGS website, Weather channel, etc..)
Yes
No
* 8.
Do you have any experience using a GPS system?
Yes
No
* 9.
Do you feel that your community has an adequate emergency response system in
place for the onset of natural disasters?
Yes
No
10.
Do you feel that GIS and Remote Sensing is a very appropriate way of coping with a
natural disaster before, during and after the onset of a natural hazard
Yes
No
What state are you located in?
Why are people saying they're is gonna be an earthquake today in California?
Oct 18, 2010 in
Earthquake Questions
I keep hearing they’re is gonna be a 6.5 to 7.0 earthquake likely in Southern California; Most likely in the Coachella, Salton Sea area or Chino Hills, Los Angeles area. October 1 2010 98% chance =O &&’d Everyone on twitter is making a big deal :/
Find the distance of an earthquake?
Oct 18, 2010 in
Earthquake Questions
a problem in my physics book went something like this
Earthquakes produce Pwaves and Swaves. Pwaves have a constant velocity of 8km/s and Swaves have constant velocity of 6km/s. If a station records Pwaves and 33seconds later records Swaves, how far away was the earthquake??
I need a recent, well-known earthquake disaster to do a study on earthquake preparedness?
Oct 18, 2010 in
Earthquake Questions
I need a earthquake disaster that took place recently and is pretty well known. There needs to be enough information on it to study the causes of why exactly the buildings/bridges/etc collapsed and then how it is being corrected in current structure designs.
please help i have been sick and so now i have a ton of stuff to do and i just found out about this project now i need to finish this tonight its due tommorow! so anyways i need know -
location of the earthquake
magnitude
intensity – damage
year (its 1923 right?)
between which two tectonic plates
…thats it but i also need two reliable sources tooo!
oh and i also need Alot of Good pictures!!
thanks a bunch !!! :]
I am in Italy and want to see if anything is happening
Is there really gonna be a big California Earthquake This year?
Oct 18, 2010 in
Earthquake Questions
On the news they tell everyone to prepare for the big one all through out california and that it might be a 8.7 earthquake..is that..possible? Omg is that why everyone is moving away?
Three ways we can make buildings earthquake resistant? Also two ways people can prepare for earthquakes?
Oct 18, 2010 in
Earthquake Questions
What physical process created the himalayas and the San Andreas Fault in California?
Oct 18, 2010 in
Earthquake Questions
What are some famous Earthquakes and volcanic eruptions?
Could i have a list.
thanks
What is the biggest volcanic eruption and earthquake?
EPICENTER 2010 CONCERT: Is anybody here that is going? If so, please help me out with these questions?
Oct 18, 2010 in
Earthquake Questions
I am trying to buy tickets and when I find them I see that it says the Section and the Row, but once I type in the given section and row in the Auto Speedway Club (which is the venue that the concert is going to be held at) – it says this is invalid. The tickets info says: "unreserved general admission"
What does "Unreserved General Admission" mean? You can sit anywhere you want? First come, first serve?
Earthquakes that measured at certain numbers on the richter scale?
Oct 18, 2010 in
Earthquake Questions
geography
i need to know an earthquake that happend at
1
2
3
4
5
6
and 7
on the richter scale
thank you guys xxx
i’ve already typed them into google sozzy xx
what is the cable called that connects a remote to an epicenter?
Oct 18, 2010 in
Earthquake Questions
well i bought an epicenter at a yard sale and the remote doesnt have the correct cable so where can i get one and what is the cable called? the cable looks like a a phone cable but those dont work..
How are seismic waves used to provide evidence about Earth's interior?
Oct 18, 2010 in
Earthquake Questions
What measurement is the Richter Scale based on of a seismic wave?
Oct 18, 2010 in
Earthquake Questions
Which of the following would NOT be a likely location for seismic activity?
Oct 18, 2010 in
Earthquake Questions
a. Boundaries between continental plates
b. Boundaries between oceanic and continental plates
c. Along mid-oceanic ridges
d. Faults associated with volcanic activity
e. Interior of continental plates
I would appreciate help with this question. Although it is "cheating", I haven’t been able to find anything that helps me… and I’ve been working on it for 3 hours. Please… help.
Thank you!
I was going to pick this one, but I hate being wrong… so I didn’t take the chance.
ive had a similar reoccuring dream the past two years of either myself watching a tidal wave and feeling scared or running away from one. does anyone have an interpretation of this?