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Seismological Activity Mystery Cache

Hidden : 4/29/2009
Difficulty:
4.5 out of 5
Terrain:
2 out of 5

Size: Size:   small (small)

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Geocache Description:

A small introduction to seismological calculation.

Sensitive devices of the Seismological Central Observatory in Finland have measured some activity in the surface of the Earth. First calculations show that the epicenter of this small earthquake is somewhere in Vantaa. Unfortunately the scientists don’t have time to calculate the exact place. They would be extremely grateful if you could help them to complete this case.

They can provide you the measures from different stations.

Code Name Latitude Longitude Time
FINES Sysmä N61° 26.633 E26° 04.433 21:18:01.859292
RAF Laitila N61° 01.342 E21° 45.875 21:18:09.683937
MEF Metsähovi N60° 13.032 E24° 23.748 21:17:50.191847
VJF Virolahti N60° 32.327 E27° 33.299 21:18:01.404887

Time indicates the moment when the earthquake was measured at the given station.

With the given parameters you can calculate the exact epicenter. That is where you will find what you are searching for.

Professors at the seismological center of Finland advice you to use the following assumptions:

  • Use WGS84 standard to model the earth.
  • Distance between FINES and RAF is 236.12590 kilometers
  • Within this area earthquake travels on a constant speed.



Good luck for your calculations.

Additional Hints (No hints available.)