historical earthquakes in Turkey

Map and timeline of the earthquakes in Turkey since 1905. To pick an interval: click and drag on the timeline.

last month's earthquakes

Map and timeline of the earthquakes worldwide last month. To pick an interval: click and drag on the timeline.

earthquakes in South America

Draggable 3D-model depicting the depth of the hypocenter and thus de position of the subduction zone..

longitudinal wave

Draggable animation of a p-wave.

transverse wave

Draggable animation of a s-wave.

the Doppler effect

Animation showing the correlation between the change in position of a star and the changes in wavelength and spectrum.

Illumination of the earth

Interactive showing the seasons and the duration of day and night

sun's path at the equinoxes

Set time and place and drag the model. The sun casts real shadows.

sun's path at the summer solstice

Set time and place and drag the model. Toggle sun's path at equinox on/off for comparison.

the structure of the earth

Draggable and annotated 3D model of the earth. Doubleclick on the map layer to make it transparent. Northern hemisphere.

isostatic rebound

Animation showing the effects of the formation of an ice cap on the lithosphere.

atmospheric pressure

Set altitudes and discover the correlation between altitude and pressure.

oxygen in the troposhere

Set the altitude and compare oxygen levels to those at sea level.

map comparison tool

Select a left and right hand side map, drag the globe and compare.

cold front

Animation showing the effect of the passage of a cold front on temperature and precipication.

magnetic striping and seafloor spreading

Block diagram and interactive timeline showing magnetic reversals from the past 4 million years.

the origing of the Himalayas

Interactive block diagram showing the formation of the Himalayas and explaining the occurrence of ocean sediments at high altitudes.