I think that statement is false.
It is not correct if we stated that rivers do not have detectable current. To prove this, if a person jumped into a river , that person will float downstream. So it has detectable current
hope this helps
Answer:
Earthquakes are measured using instruments called seismometers, that detect the vibrations caused by seismic waves as they travel through the crust. Seismic waves can be both natural (from earthquakes) or caused by human activity (explosions).Yes, some people say they can predict earthquakes, but here are the reason.
Behrain, Kuwait and Saudi Arabia etc
Magnesium is a mineral I believe the rest are vitamins