| Value: | 978.03 |
| Description: | Gravity(g) in cm/sec/sec |
| Value: | 3 |
| Description: | Code for an alternate time derived by a Human (who has hopefully reviewed the data). |
| Value: | 2 |
| Description: | Code for an alternate time derived by the database or strong motion database insertion module. |
| Value: | 0 |
| Description: | Code for no alternate time. |
| Value: | 1 |
| Description: | Code for an alternate time derived by a program module that receives a message from a box in the field. |
| Value: | 20 |
| Description: | Maximum number of spectral values for a given message. |
| Value: | -1 |
| Description: | NULL value for PGA, PGV, and PGD measurments. If any of the peak measurments for a message are not available, use SM_NULL in there place to indicate so. All measurements in the Earthworm TYPE_STRONGMOTION2 message are assumed to be positive. SM_NULL indicates that a measurement is missing, and any other negative value will result in unpredictable behavior from strong motion applications. |