| Using a low energy-consumption application, we have used the smartphones inertial sensor as an accelerograph. |
| The study presented in this paper is based on main shock strong motions from 13 stations of the Algerian accelerograph network. |
| It begins by summarizing the accomplishments of the preceding seismological observations, which provided the stepping-stone ideas on how to construct the first strong motion accelerograph. |
| Finally, the mechanical characteristics of the first strong motion accelerograph are outlined. |
| The system has a central accelerograph station, located at bedrock level, in which the ground motion is recorded after the occurrence of any earthquake. |
| These efforts included the diagnosis of existing equipment, the corrective maintenance of accelerograph stations, and the design and construction of the sheds where new equipment was installed. |
