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| Topic: 7.9 Alaska earthquake | |
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http://www.cnn.com/2018/01/23/us/alaska-earthquake/index.html
CNN)Forecasters canceled tsunami warnings for Alaska and the US and Canadian west coasts Tuesday after an earthquake in the Gulf of Alaska stoked fears of damaging waves. The tsunami alerts were canceled "because additional information and analysis have better defined the threat," said the National Tsunami Warning Center in Palmer, Alaska. |
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That is good news. I was impressed with the warning system and manner in which evacuations were taking place in Alaska.
It is reassuring to know that the warning system in place...works |
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That is good news. I was impressed with the warning system and manner in which evacuations were taking place in Alaska. It is reassuring to know that the warning system in place...works |
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Wow, 7.9 thats huge!
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7,9 ? oh man..huge one
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I wonder what effect this quake will have on the plate dynamics it is attached to?
Cause and Effect... When ever an event happens it affects other areas too. Crustal plates are huge but they flex. Earthquakes are basically a change in the tension between two or more plates. When tension in one spot is released it causes a shift over the entire plate. Either increasing tension at another point or decreasing (releasing) tension at another point. 7.9 is a large amount of movement. 
The Pacific plate moved. That movement will be transmitted all around its perimeter. It will affect all the plates against it in one way or another. There will be more activity at areas around the plate in the near future. Especially in the unstable regions with many faults. San Andreas is in for some shaking. |
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I wonder what effect this quake will have on the plate dynamics it is attached to? Cause and Effect... When ever an event happens it affects other areas too. Crustal plates are huge but they flex. Earthquakes are basically a change in the tension between two or more plates. When tension in one spot is released it causes a shift over the entire plate. Either increasing tension at another point or decreasing (releasing) tension at another point. 7.9 is a large amount of movement.
The Pacific plate moved. That movement will be transmitted all around its perimeter. It will affect all the plates against it in one way or another. There will be more activity at areas around the plate in the near future. Especially in the unstable regions with many faults. San Andreas is in for some shaking. |
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there's not anything we can do about it...
People in the affected regions can be ready and expect activity. Can't stop the plate movement but understanding the dynamics might save lives by having the likelihood of activity fresh in the mind. A difference of a surprise event to one that is expected. |
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there's not anything we can do about it...
People in the affected regions can be ready and expect activity. Can't stop the plate movement but understanding the dynamics might save lives by having the likelihood of activity fresh in the mind. A difference of a surprise event to one that is expected. |
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True but its all interconnected and dynamic so it only makes sense that a slip in one spot on a plate is going to cause movement all along its edges.
Plates are big, they are floating and under tension, all the irregularities around its edges create sticking spots we call faults. The movement at one spot takes time to affect other spots and since the irregularities are fractal, no method of prediction of the next affected fault is possible at our level of technology. Some faults are able to take more strain, some faults are able to easily slip by but some are at just the right tension or instability to result in a seismic event of measurable magnitude. Being aware of the physical properties of the tectonic plates and how they interact may not tell you a quake will happen at a location at a specific time on a specific day but it will make you aware that the likelihood of an event is probable and that information at the front of consciousness makes it more likely you can survive the event because it did not come as a surprise. Someone throws a ball at you and it hits you in the head because it surprised you VS you see someone throw a ball at you, you know its coming and you catch it. |
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True but its all interconnected and dynamic so it only makes sense that a slip in one spot on a plate is going to cause movement all along its edges. Plates are big, they are floating and under tension, all the irregularities around its edges create sticking spots we call faults. The movement at one spot takes time to affect other spots and since the irregularities are fractal, no method of prediction of the next affected fault is possible at our level of technology. Some faults are able to take more strain, some faults are able to easily slip by but some are at just the right tension or instability to result in a seismic event of measurable magnitude. Being aware of the physical properties of the tectonic plates and how they interact may not tell you a quake will happen at a location at a specific time on a specific day but it will make you aware that the likelihood of an event is probable and that information at the front of consciousness makes it more likely you can survive the event because it did not come as a surprise. Someone throws a ball at you and it hits you in the head because it surprised you VS you see someone throw a ball at you, you know its coming and you catch it. |
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True but its all interconnected and dynamic so it only makes sense that a slip in one spot on a plate is going to cause movement all along its edges. Plates are big, they are floating and under tension, all the irregularities around its edges create sticking spots we call faults. The movement at one spot takes time to affect other spots and since the irregularities are fractal, no method of prediction of the next affected fault is possible at our level of technology. Some faults are able to take more strain, some faults are able to easily slip by but some are at just the right tension or instability to result in a seismic event of measurable magnitude. Being aware of the physical properties of the tectonic plates and how they interact may not tell you a quake will happen at a location at a specific time on a specific day but it will make you aware that the likelihood of an event is probable and that information at the front of consciousness makes it more likely you can survive the event because it did not come as a surprise. Someone throws a ball at you and it hits you in the head because it surprised you VS you see someone throw a ball at you, you know its coming and you catch it. 
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okay, the point is awareness over suprise.
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Edited by
Toodygirl5
on
Tue 01/23/18 01:14 PM
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California next.
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California next. |
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California next. Yep |
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True but its all interconnected and dynamic so it only makes sense that a slip in one spot on a plate is going to cause movement all along its edges. Plates are big, they are floating and under tension, all the irregularities around its edges create sticking spots we call faults. The movement at one spot takes time to affect other spots and since the irregularities are fractal, no method of prediction of the next affected fault is possible at our level of technology. Some faults are able to take more strain, some faults are able to easily slip by but some are at just the right tension or instability to result in a seismic event of measurable magnitude. Being aware of the physical properties of the tectonic plates and how they interact may not tell you a quake will happen at a location at a specific time on a specific day but it will make you aware that the likelihood of an event is probable and that information at the front of consciousness makes it more likely you can survive the event because it did not come as a surprise. Someone throws a ball at you and it hits you in the head because it surprised you VS you see someone throw a ball at you, you know its coming and you catch it. An earthquake of magnitude 6.4 struck off Japan on Wednesday, the United States Geological Survey said. There were no immediate reports of damage or casualties from the quake, which hit 103 km (64 miles) northeast of the island of Honshu, at a depth of 64 km (40 miles). Japan lies in the 'Ring of Fire', a line of seismic faults surrounding the Pacific Ocean where earthquakes and volcanic activity are common. In the past two days, several major earthquakes have been recorded on the Ring of Fire, including off the coasts of Alaska and Indonesia. On Tuesday morning, a 7.9 magnitude earthquake struck some 170 miles southeast of Kodiak Island in the Gulf of Alaska, US. It prompted a tsunami warning for the coastal areas of Alaska and Canada's British Columbia, sending residents fleeing to higher ground, however waves failed to show up. The Indonesian island of Java was also shook by an earthquake yesterday, with the epicenter about 95 miles southwest of Jakarta at a depth of about 27 miles under the sea. The magnitude 6.0 quake damaged hundreds of homes and seriously injured six students at a school where a roof collapsed. |
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