659753
Descrição
Mapa Mental por Sharondeep, atualizado more than 1 year ago
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Criado por Sharondeep
mais de 10 anos atrás
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Tsunamis
- huge tidal waves caused by the displacement of the sea bed
- may be caused by an EQ
- caused by the dumping of sediments around the coast or near deep-sea trenches
- may be caused by an EQ
- a series of waves may be set up with wavelengths of several hundred kms
- so much energy they can reach speeds of 900 km per hour
- a large tsunami can cross the
Pacific in about 24 hours
- a large tsunami can cross the
Pacific in about 24 hours
- Height = depth of body of water
- may be unnoticeable
in the deep ocean so
the effects are most
intense in shallow
waters
- shelving coastlines vulnerable
- shelving coastlines vulnerable
- may be unnoticeable
in the deep ocean so
the effects are most
intense in shallow
waters
- Most dangerous occur in Pacific ocean as surrounded by margins
- The Pacific Tsunami Warning System
triggers warnings if an eq greater then 6.5 on
the Richter scale is detected
- 69 seismic stations
- 69 seismic stations
- The Pacific Tsunami Warning System
triggers warnings if an eq greater then 6.5 on
the Richter scale is detected
- E.g. 2004 magnitude 9.0 eq in northerm Sumatra led to a
tsunami killing over 100,000 people in countries in Indian
Ocean
- Initiates need to set up warning systems in the
Indian and Atlantic Oceans
- Initiates need to set up warning systems in the
Indian and Atlantic Oceans
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