Figure 4 Custom-made ground motion sensor (accelerometer) fabricated at the Instrumentation Physics Laboratory (IPL) of the University of the Philippines National Institute of Physics. The sensor contains the following components: (Left photo) (1) digital accelerometer; (2) development board containing the microcontroller, SD card module, and antenna for Long Range (LoRa) reception capabilities; (3) power section of board; (4) GPS module; (5) Real Time Clock (RTC) module; (6) antenna; (7) storage module; (8) power switch, (9) connection to the battery (not seen in picture) secured at the bottom of the container. (Right photo) Sensor assembled inside a closed, laser-cut acrylic sheet, with the electronic parts secured inside, connected to a pipe that serves as an extended antenna. The acrylic box is equipped with a level (button on top) to ensure horizontality of the base of the sensor. Credit: Aurelio (ongoing)

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Figure 4 Custom-made ground motion sensor (accelerometer) fabricated at the Instrumentation Physics Laboratory (IPL) of the University of the Philippines National Institute of Physics. The sensor contains the following components: (Left photo) (1) digital accelerometer; (2) development board containing the microcontroller, SD card module, and antenna for Long Range (LoRa) reception capabilities; (3) power section of board; (4) GPS module; (5) Real Time Clock (RTC) module; (6) antenna; (7) storage module; (8) power switch, (9) connection to the battery (not seen in picture) secured at the bottom of the container. (Right photo) Sensor assembled inside a closed, laser-cut acrylic sheet, with the electronic parts secured inside, connected to a pipe that serves as an extended antenna. The acrylic box is equipped with a level (button on top) to ensure horizontality of the base of the sensor. Credit: Aurelio (ongoing)

Figure 4 Custom-made ground motion sensor (accelerometer) fabricated at the Instrumentation Physics Laboratory (IPL) of the University of the Philippines National Institute of Physics. The sensor contains the following components: (Left photo) (1) digital accelerometer; (2) development board containing the microcontroller, SD card module, and antenna for Long Range (LoRa) reception capabilities; (3) power section of board; (4) GPS module; (5) Real Time Clock (RTC) module; (6) antenna; (7) storage module; (8) power switch, (9) connection to the battery (not seen in picture) secured at the bottom of the container. (Right photo) Sensor assembled inside a closed, laser-cut acrylic sheet, with the electronic parts secured inside, connected to a pipe that serves as an extended antenna. The acrylic box is equipped with a level (button on top) to ensure horizontality of the base of the sensor. Credit: Aurelio (ongoing)

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