How to locate the epicenter of an earthquake?
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Caderno Brasileiro de Ensino de Física (Online) |
Texto Completo: | https://periodicos.ufsc.br/index.php/fisica/article/view/2175-7941.2015v32n2p529 |
Resumo: | The location of the focus of origin of earthquakes involves concepts of physics which are interesting and motivating, and do not require very elaborate prior knowledge. The answer to the question “how to locate the epicenter of an earthquake?” is constructed from considerations of mechanical longitudinal waves (waves “p”) and transverse (waves “s”) and the difference in arrival time in a seismological station for of each of these waves. A simulation technique for measuring distances to the epicenter is made with the help of two toy cars moving at different speeds; the need for data from more than just one station to the precise location is discussed. The laboratory exploration of longitudinal and transverse waves in a metal rod is also discussed, with techniques for measuring the speed of longitudinal waves. There is not a “single one” answer to questions such as the one presented here, but many answers with increasing levels of complexity. The decision of what level of response is satisfactory stays with the student, and in general it is the consequence of the size of his/her motivation for the subject. |
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How to locate the epicenter of an earthquake?Como localizar o epicentro de um terremoto?The location of the focus of origin of earthquakes involves concepts of physics which are interesting and motivating, and do not require very elaborate prior knowledge. The answer to the question “how to locate the epicenter of an earthquake?” is constructed from considerations of mechanical longitudinal waves (waves “p”) and transverse (waves “s”) and the difference in arrival time in a seismological station for of each of these waves. A simulation technique for measuring distances to the epicenter is made with the help of two toy cars moving at different speeds; the need for data from more than just one station to the precise location is discussed. The laboratory exploration of longitudinal and transverse waves in a metal rod is also discussed, with techniques for measuring the speed of longitudinal waves. There is not a “single one” answer to questions such as the one presented here, but many answers with increasing levels of complexity. The decision of what level of response is satisfactory stays with the student, and in general it is the consequence of the size of his/her motivation for the subject. A localização do foco de origem de terremotos envolve conceitos de física interessantes e motivadores, além de não exigir conhecimentos prévios muito elaborados. A resposta à questão “como localizar o epicentro de um terremoto?” é construída a partir de considerações sobre ondas mecânicas longitudinais (ondas “p”) e transversais (ondas “s”) e da diferença no tempo de chegada a uma estação sismológica de cada uma dessas ondas. Uma simulação da técnica de medição de distância ao epicentro por meio de dois carros a pilha movendo-se com velocidades diferentes é apresentada; a necessidade de dados de mais de uma estação para a localização precisa é discutida. Ondas longitudinais e transversais numa barra metálica são exploradas num ambiente de laboratório didático, e técnicas para a medição da velocidade de uma onda longitudinal é apresentada. Conclui-se que não existe “uma” resposta a perguntas como a que é apresentada aqui, e sim respostas em níveis crescentes de complexidade. A decisão sobre qual nível de resposta é satisfatório cabe ao estudante, e decorre em geral do tamanho de sua motivação para o tema. Imprensa Universitária - UFSC2015-03-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsc.br/index.php/fisica/article/view/2175-7941.2015v32n2p52910.5007/2175-7941.2015v32n2p529Caderno Brasileiro de Ensino de Física; v. 32 n. 2 (2015); 529-5412175-79411677-2334reponame:Caderno Brasileiro de Ensino de Física (Online)instname:Universidade Federal de Santa Catarina (UFSC)instacron:UFSCporhttps://periodicos.ufsc.br/index.php/fisica/article/view/2175-7941.2015v32n2p529/29992Copyright (c) 2015 Caderno Brasileiro de Ensino de Físicainfo:eu-repo/semantics/openAccessCatelli, FranciscoMartins, José ArthurGiovannini, Odilon2018-03-16T12:09:50Zoai:periodicos.ufsc.br:article/35044Revistahttp://www.periodicos.ufsc.br/index.php/fisicaPUBhttps://periodicos.ufsc.br/index.php/fisica/oaicbefisica@gmail.com||fscccef@fsc.ufsc.br|| cbefisica@gmail.com2175-79411677-2334opendoar:2018-03-16T12:09:50Caderno Brasileiro de Ensino de Física (Online) - Universidade Federal de Santa Catarina (UFSC)false |
dc.title.none.fl_str_mv |
How to locate the epicenter of an earthquake? Como localizar o epicentro de um terremoto? |
title |
How to locate the epicenter of an earthquake? |
spellingShingle |
How to locate the epicenter of an earthquake? Catelli, Francisco |
title_short |
How to locate the epicenter of an earthquake? |
title_full |
How to locate the epicenter of an earthquake? |
title_fullStr |
How to locate the epicenter of an earthquake? |
title_full_unstemmed |
How to locate the epicenter of an earthquake? |
title_sort |
How to locate the epicenter of an earthquake? |
author |
Catelli, Francisco |
author_facet |
Catelli, Francisco Martins, José Arthur Giovannini, Odilon |
author_role |
author |
author2 |
Martins, José Arthur Giovannini, Odilon |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Catelli, Francisco Martins, José Arthur Giovannini, Odilon |
description |
The location of the focus of origin of earthquakes involves concepts of physics which are interesting and motivating, and do not require very elaborate prior knowledge. The answer to the question “how to locate the epicenter of an earthquake?” is constructed from considerations of mechanical longitudinal waves (waves “p”) and transverse (waves “s”) and the difference in arrival time in a seismological station for of each of these waves. A simulation technique for measuring distances to the epicenter is made with the help of two toy cars moving at different speeds; the need for data from more than just one station to the precise location is discussed. The laboratory exploration of longitudinal and transverse waves in a metal rod is also discussed, with techniques for measuring the speed of longitudinal waves. There is not a “single one” answer to questions such as the one presented here, but many answers with increasing levels of complexity. The decision of what level of response is satisfactory stays with the student, and in general it is the consequence of the size of his/her motivation for the subject. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-03-17 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufsc.br/index.php/fisica/article/view/2175-7941.2015v32n2p529 10.5007/2175-7941.2015v32n2p529 |
url |
https://periodicos.ufsc.br/index.php/fisica/article/view/2175-7941.2015v32n2p529 |
identifier_str_mv |
10.5007/2175-7941.2015v32n2p529 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsc.br/index.php/fisica/article/view/2175-7941.2015v32n2p529/29992 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2015 Caderno Brasileiro de Ensino de Física info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2015 Caderno Brasileiro de Ensino de Física |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Imprensa Universitária - UFSC |
publisher.none.fl_str_mv |
Imprensa Universitária - UFSC |
dc.source.none.fl_str_mv |
Caderno Brasileiro de Ensino de Física; v. 32 n. 2 (2015); 529-541 2175-7941 1677-2334 reponame:Caderno Brasileiro de Ensino de Física (Online) instname:Universidade Federal de Santa Catarina (UFSC) instacron:UFSC |
instname_str |
Universidade Federal de Santa Catarina (UFSC) |
instacron_str |
UFSC |
institution |
UFSC |
reponame_str |
Caderno Brasileiro de Ensino de Física (Online) |
collection |
Caderno Brasileiro de Ensino de Física (Online) |
repository.name.fl_str_mv |
Caderno Brasileiro de Ensino de Física (Online) - Universidade Federal de Santa Catarina (UFSC) |
repository.mail.fl_str_mv |
cbefisica@gmail.com||fscccef@fsc.ufsc.br|| cbefisica@gmail.com |
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