Eu vou!!!
Esse blog foi criado em 2007 para divulgar a ciência dos Terremotos. Divulgando quando necessários os tremores no Brasil e temas importantes sobre a sismologia!
sábado, 25 de outubro de 2008
quarta-feira, 22 de outubro de 2008
Sr. Francisco afirma que ainda treme em Alcântaras
"os tremores ainda acontecem aki em Alcântaras"
Veja o site www.obsis.unb.br ou entrar em contato com a UFRN.
Veja o site www.obsis.unb.br ou entrar em contato com a UFRN.
terça-feira, 21 de outubro de 2008
FRASE DO ANO
"No mundo atual está se investindo cinco vezes mais em remédios para virilidade masculina e silicone para mulheres do que na cura do Mal de Alzheimer. Daqui a alguns anos, teremos velhas de seios grandes e velhos de pau duro, mas eles não se lembrarão para que servem "
Dráuzio Varella
Dráuzio Varella
quinta-feira, 16 de outubro de 2008
Concurso de Geofísica Rasa - PARA UFRN
Na UFRN, as inscrições estão abertas.
http://www.prh.ufrn.br/conteudo/concursos/prog_efet031.htm
http://www.prh.ufrn.br/conteudo/concursos/prog_efet031.htm
Programa para o Concurso Público para
Professor Adjunto na Área de Geofísica Rasa
Geofísica - REUNI
Propagação de ondas eletromagnéticas em meio geológico.
Propriedades eletromagnéticas de rochas.
Sondagens elétricas e eletromagnéticas em meios geológicos.
O método GPR (Radar Penetrante no Solo): teoria do método, aquisição, processamento e interpretação de dados.
Aplicações de métodos eletromagnéticos em problemas de geofísica rasa: água subterrânea, meio ambiente e imageamento de estruturas e sedimentos.
Bibliografia:
Bristow, C.S. & Jol, H.M. (Eds). Ground penetrating radar in sediments. Geological Society London Special Publication 221, 2003.
Guéguen, Y. & Palciauskas, V. Introduction to the physics of rocks. Princeton University Press, 1994.
Kelly, W.E. & Mares, S. (Eds). Applied geophysics in hidrogeological and engineering practice. Elsevier, 1993.
Ward, S.H. (Ed). Geotechnical and environmental geophysics. Vols I, II and III. Society of Exploration Geophysicists, 1994.
Zhdanov, M.S. & Keller, G.V. The geoelectrical methods in geophysical exploration. Elsevier, 1994.
Geofísica - REUNI
Condutividade elétrica de rochas.
Propriedades dielétricas de rochas.
Propagação de ondas eletromagnéticas em meios geológicos.
Difusão de campo eletromagnético em meios geológicos.
Atenuação e dispersão de ondas eletromagnéticas em meios geológicos.
O problema da equivalência em sondagens elétricas.
A lei de Archie.
Procedimentos de campo para a aquisição de dados de GPR.
Processamento de dados de GPR.
Imageamento de estruturas sedimentares com GPR.
Aplicações de métodos geofísicos elétricos, eletromagnéticos e de GPR a prospecção de água subterrânea: visão geral.
Aplicações de métodos geofísicos elétricos, eletromagnéticos e de GPR a problemas de meio ambiente: visão geral.
Prof. Walter Eugênio de Medeiros (Presidente - DFTE)
Prof. Aderson Farias do Nascimento (Membro interno - DFTE)
Prof. Olivar Antônio Lima de Lima (Membro externo - UFBA)
Prof. José Antônio de Morais Moreira (Suplente interno - DFTE)
Prof. Jessé Carvalho Costa (Suplente externo - UFPA)
terça-feira, 14 de outubro de 2008
terça-feira, 7 de outubro de 2008
segunda-feira, 6 de outubro de 2008
sexta-feira, 3 de outubro de 2008
Magnitude 5.2 -Parte Central do Oceano Atlântico
--------------------------------------
Magnitude 5.2
Horário 05:30:27 UTC, 03 de Outobro
Localização 7.417°N, 37.507°W
Profundidade 10 km (Fixo pelo programa)
Distancias
1230 km NNE of Parnaiba, PI
1335 km NE of Sao Luis, MA
1560 km NE of Belem, PA
---------------------------------------
2008/10/03 05:26:22 7.446 -36.874 10.0
Magnitude 5.2
Horário 05:30:27 UTC, 03 de Outobro
Localização 7.417°N, 37.507°W
Profundidade 10 km (Fixo pelo programa)
Distancias
1230 km NNE of Parnaiba, PI
1335 km NE of Sao Luis, MA
1560 km NE of Belem, PA
---------------------------------------
2008/10/03 05:26:22 7.446 -36.874 10.0
Dados da estação RCBR (Riachuelo, Brasil)
último registro 03/10/08 23:48 GMT
quinta-feira, 2 de outubro de 2008
Eitá explicação estranha! o tremor de Uberaba!
"É onde o rio Grande e seus afluentes, como o rio Uberaba, imprimem zonas de maiores fraquezas. Estas regiões mostram fraturas e grandes falhas interligadas, que rasgam e se aprofundam, tendo como conseqüência a possibilidade da ocorrência destes abalos sísmicos"
----> Ok! Essas fraturas podem ser reativadas, o imprimem que é estranho.
"Trata-se de uma zona de montanhas muito íngremes, na qual há uma cadeia energética significativa que está ligada ao tremor verificado no início da semana",
---> Então teríamos sismos no Pico da Neblina e toda Serra da Mantiqueira. Essa afirmação não procede.
"há outros elementos naturais nesta cadeia presente na região que podem influenciar em tremores como o ocorrido na segunda-feira. "Uberaba e estas outras localidades estão em uma área cujo vulcanismo é notável. O conjunto de rochas de idade Cretácea, contemporâneas à época dos dinossauros, agasalha detritos vulcânicos. Portanto, possui todas as condições naturais de reunir vários fenômenos naturais como vulcões e cinzas vulcânicas. Além disso, é uma área que guardou, ao longo dos séculos, ricos depósitos de diamantes, e conta com lavas basálticas, calcário, rochas fosfáticas", aponta.
---> Explique porque Caldas Novas não apresenta atividade considerável? Na verdade, o vulcanismo anterior poderá deixar uma região crustal (Frágil) menor e assim uma menor área sofre um esforço maior e assim causa sismo. Isso é muito complexo para impressa.
Os moradores destas cidades podem voltar a sentir na superfície estes tremores, causados pelos movimentos rochosos abruptos. E também nada impede que estes abalos sísmicos sejam até mesmo um pouco maiores", afirma.
---> Isso é verdade
"Apesar de as placas tectônicas desta região não serem tão grandes, elas podem provocar estrondos. Mas está afastada a possibilidade de serem registrados tremores de grandes magnitudes, capazes de derrubar prédios ou levantar carros das vias",
---> Há placas tectônicas nessa região? Acho que essa foi do jornalista.
Matéria completa --> http://www.jmonline.com.br/?canais,10,08,39
----> Ok! Essas fraturas podem ser reativadas, o imprimem que é estranho.
"Trata-se de uma zona de montanhas muito íngremes, na qual há uma cadeia energética significativa que está ligada ao tremor verificado no início da semana",
---> Então teríamos sismos no Pico da Neblina e toda Serra da Mantiqueira. Essa afirmação não procede.
"há outros elementos naturais nesta cadeia presente na região que podem influenciar em tremores como o ocorrido na segunda-feira. "Uberaba e estas outras localidades estão em uma área cujo vulcanismo é notável. O conjunto de rochas de idade Cretácea, contemporâneas à época dos dinossauros, agasalha detritos vulcânicos. Portanto, possui todas as condições naturais de reunir vários fenômenos naturais como vulcões e cinzas vulcânicas. Além disso, é uma área que guardou, ao longo dos séculos, ricos depósitos de diamantes, e conta com lavas basálticas, calcário, rochas fosfáticas", aponta.
---> Explique porque Caldas Novas não apresenta atividade considerável? Na verdade, o vulcanismo anterior poderá deixar uma região crustal (Frágil) menor e assim uma menor área sofre um esforço maior e assim causa sismo. Isso é muito complexo para impressa.
Os moradores destas cidades podem voltar a sentir na superfície estes tremores, causados pelos movimentos rochosos abruptos. E também nada impede que estes abalos sísmicos sejam até mesmo um pouco maiores", afirma.
---> Isso é verdade
"Apesar de as placas tectônicas desta região não serem tão grandes, elas podem provocar estrondos. Mas está afastada a possibilidade de serem registrados tremores de grandes magnitudes, capazes de derrubar prédios ou levantar carros das vias",
---> Há placas tectônicas nessa região? Acho que essa foi do jornalista.
Matéria completa --> http://www.jmonline.com.br/?canais,10,08,39
Boletim da atividade sísmica de Sobral e região mês setembro 2008. (Fonte: UFRN)
Obs: Os dados são obtidos através da estação SBBR do projeto do Milênio/CNPq, (instalada em Sobral desde 23/08/2007).
O horário abaixo é GMT = subtrai -3 h para obter a hora local
09/01 03 Hora Mb
- 09:03 1.6
- 10:29 3.1
- 10:36 1.7
09/02 03
09/03 00
09/04 00
09/05 00
09/06 00
09/07 01
09/08 01
09/09 00
09/10 03
09/11 01 Hora Mb
- 12:35 2.7
09/12 01
09/13 03 Hora Mb
- 06:01 2.4
09/14 02
09/15 01
09/16 02 Hora Mb
- 09:45 2.2
09/17 00
09/18 00
09/19 03 Hora Mb
- 10:16 1.8
- 11:39 2.2
- 13:33 1.7
09/20 00
Ate as 17:09 h. GMT
Total desde 28/01/2008 1508 eventos.
A UFRN ecaminhou um boletim sobre a atividade do Ceará.
Devido ao meu tempo, não consegui publicar o boletim da UFRN, mas irei colocar breve.
Um abraço a Todos da UFRN.
George Sand
Um abraço a Todos da UFRN.
George Sand
Seminário do Hamza, GEOPE, Foi ontem!! Fiquei curioso
Dr. Valiya M. HamzaResumo: O Geope é a superfície equipotencial do campo da gravidade, ao longo da qual uma camada de fluido se espalha uniformemente. Quando se refere ao nível do mar o geope recebe o nome de Geóide, que pode ser entendido como um hidrogeope. A mudança proposta na nomenclatura leva em consideração o fato de que existem outros fluidos no ambiente terrestre. Por exemplo, magma é um fluido presente no interior da Terra, oriundo geralmente da camada sublitosférica, denominada de astenosfera. O fluido da astenosfera também possui uma superfície equipotencial, semelhante ao do hidrogeope: Referimos ao Geope Astenosférico. Geope Astenosférico é relacionado com a ?flutuabilidade? da crosta e das placas tectonicas em geral. É um geope primário e de suma importância para os estudos tectônicos. As características do hidrogeope são determinadas em grande parte pelo geope astenosférico. A conferência aborda meios de investigação do Geope Astenosférico e suas aplicações em Geodésia, Geologia eGeofísica.
Local: Auditório do Observatório Nacional
Data: 01/10/2008Hora: 15:30
Local: Auditório do Observatório Nacional
Data: 01/10/2008Hora: 15:30
terça-feira, 30 de setembro de 2008
Tremor no Sul de Minas
Horário 15:19:20
LAT -19.9
LONG -47.33
Magnitude 3.1
Várias cidades sentiram esse tremor. www.obsis.unb.br
LAT -19.9
LONG -47.33
Magnitude 3.1
Várias cidades sentiram esse tremor. www.obsis.unb.br
quinta-feira, 25 de setembro de 2008
Substituição da Rede Sismográfica por Rede de laptops, Imagine?
Sep 25th 2008
From The Economist print edition
How to use your laptop to locate an earthquake
IF YOU drop your laptop computer, a chip built into it will sense the acceleration and protect the delicate moving parts of its hard disk before it hits the ground. A group of researchers led by Jesse Lawrence of Stanford University are putting the same accelerometer chip to an intriguing new use: detecting earthquakes. They plan to create a network of volunteer laptops that can map out future quakes in far greater detail than traditional seismometers manage.
Seismometers are large, expensive beasts, costing $10,000 or more apiece. They are designed to be exquisitely sensitive to the sort of vibrations an earthquake produces, which means they can pick up tremors that began halfway around the world. By contrast, the accelerometer chips in laptops, which have evolved from those used to detect when a car is in a collision and thus trigger the release of the airbags, are rather crude devices. They are, however, ubiquitous. Almost all modern laptops have them and they are even finding their way into mobile phones. The iPhone, for example, uses such a chip to detect its orientation so that it can rotate its display and thus make it easily readable.
On its own, an accelerometer chip in a laptop is not very useful for earthquake-detection, as it cannot distinguish between a quake and all sorts of other vibrations—the user tapping away at the keyboard, for example. But if lots of these chips are connected to a central server via the internet, their responses can be compared. And if a large number in a particular place register a vibration at almost the same time, it is more likely to be an earthquake than a bunch of users all hitting their space bars. To exploit this group effect, Dr Lawrence’s Quake-Catcher Network (QCN) employs the same software that is used by the SETI@home project, which aggregates computing power from hundreds of thousands of volunteer computers around the world to analyse radio-telescope signals for signs of extraterrestrial intelligence.
Dr Lawrence and his colleagues have already demonstrated that the QCN works. It detected a quake near Reno, Nevada, in April, and one near Los Angeles in July. Merely detecting a quake, however, is not the point. Seismometers can do that. To be useful, the QCN needs to be able to do things that seismometers cannot.
One of those things is to measure the maximum amount of ground shaking. The sensitivity of seismometers means that strong signals would damage them if they were not designed to “clip” such signals when they exceed a certain threshold. The price paid is that information about strong, nearby earthquakes is lost. Laptop accelerometers are more robust. Though they cannot, if in America, tell you anything about an earthquake in China, they can sometimes do better than conventional kit when measuring local quakes.
The network’s second benefit is of sheer numbers. This should allow the construction of far more detailed maps of the up-and-down and side-to-side motions induced by earthquakes. These vary a lot from quake to quake, and that means the damage done by a quake of any given strength is also variable. A better understanding of how movement and damage relate might help both building design and town planning in earthquake zones.
Of course, for that to work, you have to know where each laptop was at the moment of the quake. Ideally, this information would come from a Global Positioning System device fitted within the laptop, but few computers have them at the moment. In their absence, information automatically supplied about the site of the nearest router (a network device that computers use to connect to the wider internet) gives a rough location. This is imperfect, but pooling the data from lots of laptops means that location errors can be detected statistically and erroneous data discarded.
If that can be done quickly enough, the QCN could bring a third—and most valuable—benefit: warning. The speed of internet communication, coupled with a scheme for uploading data from each computer at brief intervals, means that Dr Lawrence’s network could issue an earthquake warning within seconds. That is faster than traditional seismometer networks, which update less regularly, and, above all, is much faster than seismic waves travel. Warnings could thus be broadcast to places the earthquake waves had not yet reached, giving people vital time to find a place of refuge.
At the moment, the QCN has about 1,500 participating computers. But, as happened with SETI@home, the researchers expect numbers to grow once knowledge of the project spreads: qcn.stanford.edu, for those who want to join in the fun.
From The Economist print edition
How to use your laptop to locate an earthquake
IF YOU drop your laptop computer, a chip built into it will sense the acceleration and protect the delicate moving parts of its hard disk before it hits the ground. A group of researchers led by Jesse Lawrence of Stanford University are putting the same accelerometer chip to an intriguing new use: detecting earthquakes. They plan to create a network of volunteer laptops that can map out future quakes in far greater detail than traditional seismometers manage.
Seismometers are large, expensive beasts, costing $10,000 or more apiece. They are designed to be exquisitely sensitive to the sort of vibrations an earthquake produces, which means they can pick up tremors that began halfway around the world. By contrast, the accelerometer chips in laptops, which have evolved from those used to detect when a car is in a collision and thus trigger the release of the airbags, are rather crude devices. They are, however, ubiquitous. Almost all modern laptops have them and they are even finding their way into mobile phones. The iPhone, for example, uses such a chip to detect its orientation so that it can rotate its display and thus make it easily readable.
On its own, an accelerometer chip in a laptop is not very useful for earthquake-detection, as it cannot distinguish between a quake and all sorts of other vibrations—the user tapping away at the keyboard, for example. But if lots of these chips are connected to a central server via the internet, their responses can be compared. And if a large number in a particular place register a vibration at almost the same time, it is more likely to be an earthquake than a bunch of users all hitting their space bars. To exploit this group effect, Dr Lawrence’s Quake-Catcher Network (QCN) employs the same software that is used by the SETI@home project, which aggregates computing power from hundreds of thousands of volunteer computers around the world to analyse radio-telescope signals for signs of extraterrestrial intelligence.
Dr Lawrence and his colleagues have already demonstrated that the QCN works. It detected a quake near Reno, Nevada, in April, and one near Los Angeles in July. Merely detecting a quake, however, is not the point. Seismometers can do that. To be useful, the QCN needs to be able to do things that seismometers cannot.
One of those things is to measure the maximum amount of ground shaking. The sensitivity of seismometers means that strong signals would damage them if they were not designed to “clip” such signals when they exceed a certain threshold. The price paid is that information about strong, nearby earthquakes is lost. Laptop accelerometers are more robust. Though they cannot, if in America, tell you anything about an earthquake in China, they can sometimes do better than conventional kit when measuring local quakes.
The network’s second benefit is of sheer numbers. This should allow the construction of far more detailed maps of the up-and-down and side-to-side motions induced by earthquakes. These vary a lot from quake to quake, and that means the damage done by a quake of any given strength is also variable. A better understanding of how movement and damage relate might help both building design and town planning in earthquake zones.
Of course, for that to work, you have to know where each laptop was at the moment of the quake. Ideally, this information would come from a Global Positioning System device fitted within the laptop, but few computers have them at the moment. In their absence, information automatically supplied about the site of the nearest router (a network device that computers use to connect to the wider internet) gives a rough location. This is imperfect, but pooling the data from lots of laptops means that location errors can be detected statistically and erroneous data discarded.
If that can be done quickly enough, the QCN could bring a third—and most valuable—benefit: warning. The speed of internet communication, coupled with a scheme for uploading data from each computer at brief intervals, means that Dr Lawrence’s network could issue an earthquake warning within seconds. That is faster than traditional seismometer networks, which update less regularly, and, above all, is much faster than seismic waves travel. Warnings could thus be broadcast to places the earthquake waves had not yet reached, giving people vital time to find a place of refuge.
At the moment, the QCN has about 1,500 participating computers. But, as happened with SETI@home, the researchers expect numbers to grow once knowledge of the project spreads: qcn.stanford.edu, for those who want to join in the fun.
domingo, 21 de setembro de 2008
Magnitude 5.4 - Costa Sul do Peru
Magnitude 5.4
Horário 20 de Setembro de 2008 às 14:43:05 UTC
Localização16.126°S, 73.761°W
Profundidade 41.5 km valor fixo
Distancia
160 km SSE of Puquio, Peru
240 km W of Arequipa, Peru
Dados da Estação RCBR (Riachuelo, Brasil)
último registro às 05:48 21/09/08 GMT
sábado, 20 de setembro de 2008
Veja o Trailer de 1959 do filme Jornada para o Centro da Terra (Journey to the Center of the Earth)
O que vc acha que esse filme mostra a estrutura da terra?
Earthquakes and Animals And Pets may be able to predict earthquakes
Earthquakes and Animals
Across Southern California, the 5.4 earthquake rattled furry nerves and ruffled feathers--literally.
"My birds felt it first," reported one reader. "They were all fluffy and upset a few seconds before it happened."
In Chino Hills, the epicenter of the quake, Alissa Sissung's 10-year-old daughter, Delaney, was spending the day at a horse camp not far from her home. Just before the ground began to quiver, her daughter watched the horses and dogs stir nervously, Sissung told Times reporter Molly Hennessy-Fiske.
Another reader e-mailed: "I was feeding my horse when all of a sudden, he took off running. Seconds later is when the earthquake hit."
And word filtered in to us from Garden Grove about a greyhound at a rescue shelter who rarely gets up, but who suddenly stood up and looked around, to the surprise of the humans there. Then the earthquake hit.
Whether they really could sense the earthquake a'coming--as fabled--or were as jolted into surprise as their people, the area's animals seem to have withstood the temblor as well as humans did.
Although, like people, they did their share of freaking out. "My cats went running through the room scared to death," Michael Gelfond, an attorney working out of his Beverlywood home office, told Times reporter Tami Abdollah.
Elizabeth Gonzales suffered one of the day's few quake-related injuries--a dog bite. The veterinarian was examining a mixed-breed terrier when the walls of Chino Hills Small Animal Hospital began to rattle. The frightened dog promptly sunk its teeth into Gonzales' hand.
"They are pretty deep punctures," Gozales told L.A. Times reporter Paul Pringle. But "he's always been a good doggie."
Gonzales says that reaction is not unusual. Dogs, cats, and other animals often become terrified when the ground moves. "They don't know what's going on," she said. "They don't feel secure in their surroundings." Gonzales advises keeping dogs and cats away from windows during and immediately after a quake, lest they jump out in panic. "Their first instinct is, 'Where can I go hide?'"
The Los Angeles county shelter system reported that all its animals and buildings weathered the quake just fine. Same report from the Los Angeles city shelters. "No damage," said L.A. Animal Services general manager Ed Boks. "And, no, the animals did not give us any warning of the earthquake--like they're supposed to," he deadpanned.
Even in Pomona, just seven miles from the epicenter, the Inland Valley Humane Society survived undamaged, and the animals were well, according to Jim Edward, operations manager of the shelter. "You hear so many stories about how they're intuitive and seem to know it's coming," Edward said. "No. It was just another day for them. Maybe it's the soft music we play in the kennels."
--Carla Hall
fonte:Los Angeles Times
PETS MAY BE ABLE TO PREDICT EARTHQUAKES
“They’re on the ground in bare feet and they can feel these things. Their senses are so much more alive than ours,” Hettig said Thursday.
Others said their pets were scared by the quake.
"I have a yellow-headed Amazon and when there's an earthquake he flutters down to the bottom of his cage and acts like he's being attacked, but he doesn't know by what," said Cindy Scott, a vet tech at Animal Emergency Clinic of the Desert.
What are some tips to keep your pets safe in case of an earthquake?
-Make sure there is a supply of canned/dry pet food and bottled water with other emergency supplies including pet prescription and medicine.
-If roads are blocked because of a natural disaster, professional help may not be immediately available so familiarize yourself and other family members with pet CPR, resuscitation and general first aid procedures. Your quick action can save your pet's life.
-Try not to display stress or anxiety when dealing with pets. Most animals are very aware of their owner's emotions and can read your stress. This can cause otherwise calm pets to display aggressive behavior.
-After a fire or disaster, check pet structures and favorite hiding places for hazardous debris.
-Ask your local fire department, animal shelter, or veterinarian for a "Pet Alert" sign for doors and windows. In non are available, make your own by listing your pets on a 3 by 5 card and display it prominently. This alerts emergency teams there may be pets that need assistance.
-Dogs and cats should wear I.D. tags with current address and/or phone numbers at all times. This will make it easier for you and your pet to be reunited if separated.
-Keep up-to-date on your pet's vaccinations. Pets may become disoriented and stray, or housed in shelters with other animals herby potentially becoming exposed to infectious diseases.
-Alert local shelters if your pet is missing.
terça-feira, 16 de setembro de 2008
Magnitude 5.2 - Na meso, 650 km de Fernando de Noronha
Magnitude 5.8
Horário 16 de Setembro às 07:28:25 UTC
Localização 0.958°N, 29.010°W
Profundiade 10 km Valor fixo
Distancias
650 km NE de Fernando de Noronha, Pernambuco, Brasil
1020 km NE de Natal, Rio Grande do Norte, Brasil
1185 km NNE de Recife, Pernambuco, Brasil
Dados da estação RCBR (Riachuelo, Brasil)
último registro 17/09/08 00:18 GMT
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