Ground Motion News Today

welcome. more now on mondays devastating earthquake, the biggest in the region since 1939. its killed over 7,000 people. the border area between turkey and syria is one of the worlds most seismically active regions. 0ur correspondent quentin sommerville has travelled to antakya, close to the border with syria, thats been hit by aftershocks. with pickaxe and hammer, determination and hope, they dig for lost relatives in antakya. this backbreaking work falls to these men. their city and ...

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Strong quakes, but would you have expected more resilience from the building structure had those lessons been learnt from the 1999 earthquake?— been learnt from the 1999 earthauake? . , ., been learnt from the 1999 earthauake? . , . ., earthquake? certainly, at least far awa from earthquake? certainly, at least far away from the _ earthquake? certainly, at least far away from the epicentre, - earthquake? certainly, at least far away from the epicentre, we - earthquake? certainly, at least far ...

National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan We analyzed strong-motion records at the ground and borehole in and around the Kanto Basin and the seafloor in the Japan Trench area from three nearby offshore earthquakes of similar magnitudes (Mw 5.8–5.9). The seafloor strong-motion records were obtained from S-net, which was established to enhance tsunami and earthquake early warnings after the 2011 great Tohoku-oki earthquake disaster. The borehole recor...

>> theres actually a number of questions in terms of the ground motion that are radiated from faults. as they break to the surface. theres indications that the ground motions are lower. than they might be expected from ruptures that are buried. talking about the north ridge earthquake. there was a buried fault. it was very energetic. the magnitude was 6.7. it was incredibly strong shaking. this earthquake its going to be interesting to see. its a 7.1. the ground shaking in the preliminary indica...

Thats important if we can understand that. and be able to better forecast what might happen in the next -- >> theres an unusual point. on the 6.4 the rupture moved down the fault more slowly an average. and maybe that contributes to the lower ground motion rather than breaking through. we dont know yet. how fast it ruptured down the fault. ta will help us address some of the pictures. and were lucky well have a different rupture speed and compare how the ground motions look. >> would it appear t...

Underneath the north american plate. where two plates slide past each other is where you typically get the biggest and most earthquakes. >> earlier in the practical broadcast there was a reporter from "the washington post" indicated the soil -- again, as were having this conversation, this is video of people literally running for their lives as the earthquake hit yesterday. but were told the soil is also a factor in the severity of these earthquakes in mexico city. what do we know about that? >>...

Dependent on that, and we really dont know how its going to -- [inaudible] during a big earthquake. jenna: were actually showing some amazing footage that we have from 1994. what is the scenario that youre projecting if an earthquake of this magnitude hit on the san andreas fault now? >> okay. so were talking about the big san andreas earthquake -- [inaudible] and with strong ground motion more where -- [inaudible] north ridge was actually a near miss. the really strong ground motions were up in...

>> thank you very much. >>gregg: 75 years ago an orange and reddish engineering marvel opened to traffic: the golden gate bridge in san francisco in the city by the bay. celebrating the anniversary in a big way, claudia is by the bridge with that breathtaking view. >>reporter: you know, crews say they are blown away by how well it was constructed and how knowledgeable those engineers were about the geology and the ground motion in this area back in the 1930s designing this with a number two penc...

also, infighting within the tea party movement, and a congressmans explosive charges that elements of the movement would like to see him hanging from a tree. and well take you inside the archives of moammar gadhafis brutal regime and uncover secrets that massacre victims took to their graves. we want to welcome our viewers in the united states and around the world. im wolf blitzer. youre in "the situation room." there is little to celebrate this labor day weekend here in the united...