co2 injections may cause earth quakes, page-4

Earthquakes soon after carbon-dioxide injection is as good as saying full moons cause earthquakes!!

It is taking ages to build up pressure in Grieve oil-field--any seismic activity would go unnoticed in my opinion.
The same argument could be in reverse, quakes are being caused by oil being taken out of the ground.

Massive man made lakes behind big dams can cause small seismic events.

Many small seismic events are not felt.

4 on the richter scale are usually not noticed if one is moving around.

I live near Christchurch in NZ where one of the most expensive earthquakes on the planet occurred about three years ago---still dismantling buildings.

Seismic activity would be the least of my concerns.

All in my opinion.

Cham