By Mr. Takahiro Yamada, Head of Administration Division, IISEE

The 2022 Global Seismology Observation course which started on January 10^th, 2023 was closed on Friday, March 3^th, 2023.

Please see the Newsletter attached on page 1-2.

By Oualid BOULAHIA (Algeria)

Dear honorable assistant, Sensei, teachers, mentors, and fellow participants, Morning greetings.

As we come to the end of this training course, I have the honor of addressing this distinguished audience

and thanking them for giving us a chance to participate in such a formative educational experience.

Please see the Newsletter attached on page 3-4.

By Dr. Takumi Hayashida, Senior Research Scientist, IISEE

Mt. Tsukuba, located about 10 km north of BRI, is one of Japan's 100 famous mountains.

The mountain is composed of hard rocks and is located away from urban areas with high cultural seismic noise, making it a suitable site for seismic observation.

Please see the Newsletter attached on page 4-5.

By ACHEMINE Yasmine (Algeria)

By CHAN KUM TONG Darcy Luuga Naivins (Samoa)

Please see the Newsletter attached on page 5-8.

By Dr. Hiroto Nakagawa, Senior Research Engineer, IISEE

Fourteen participants visited the Geospatial Information Authority of Japan (GSI) on January 25th.

First, two lecturers from GSI gave lectures on GSI’s activities related to Global Navigation Satellite System (GNSS) and Interferometric Synthetic Aperture Radar (InSAR).

Please see the Newsletter attached on page 8.

By Dr. Mai Ito, Senior Research Engineer, IISEE

Fourteen participants visited National Research Institute for Earth Science and Disaster Resilience (NIED) on February 10^th.

Please see the Newsletter attached on page 9.

By Dr. Takumi Hayashida, Senior Research Scientist, IISEE

Vs30, the average S-wave velocity in the upper 30 m from the ground surface, is widely used to indicate ground-motion amplification.

One way of the on-site Vs30 estimation is to conduct a microtremor survey.

Please see the Newsletter attached on page 9.