milligal
Accelerationexact by definition
The milligal is 10⁻⁵ m/s², a thousandth of a gal, and roughly one part per million of Earth's gravity. It is the working unit of gravity surveying: a buried void, a salt dome or an ore body shows up as an anomaly of a fraction of a milligal to a few milligals in a corrected survey.
Watch out: Raw gravity readings have to be corrected before an anomaly means anything. Gravity falls about 0.3086 mGal per metre of elevation (the free-air gradient), varies with latitude by roughly 0.8 mGal per kilometre north-south at mid-latitudes, and shifts with tides by up to 0.3 mGal, so an uncorrected difference of a milligal is more likely to be geometry than geology.
| 1 | 0.00001 |
One milligal in every acceleration unit
| 1,000 | microgal (μGal) | |
| 1 | milligal (mGal)this unit | |
| 0.01 | millimeter per second squared (mm/s²) | |
| 0.001 | centimeter per second squared (cm/s²) | |
| 0.001 | gal (Gal) | |
| 0.000393701 | inch per second squared (in/s²) | |
| 0.000036 | kilometer per hour per second (km/h/s) | |
| 0.0000328084 | foot per second squared (ft/s²) | |
| 0.0000223694 | mile per hour per second (mph/s) | |
| 0.00001 | meter per second squared (m/s²) | |
| 0.00000101972 | standard gravity (g) |
Solvers that use acceleration