Nepal’s Earthquake Safety Day rhetoric contest

Around mid-January each year is Nepal’s Earthquake Safety Day. On occasion of the 24th such day (2022 in the western world, 2078 in the Nepali calendar), the Seismology at School in Nepal program has organized a rhetoric contest: videos up to 4 minutes long were to compete on the topic of “The role of schools in earthquake preparedness“. A total of 55 videos have been received, which is much above the expectations – congratulations to all participants on their motivation, and thank you for taking part. Below is a poster showing everyone who entered this contest. The top 3 performers have received an award: Aayushma Pokhrel, Samir Ahamad, and Anup Lamichhane. Congratulations!

Year-closing fieldwork

Although the calendar year is still to end, good conditions for full-day fieldwork ended in October when setting back to Winter time. We used the last opportunity to return to the field, for the third time this year, and finished the measurement campaigns in a beautiful yet locally steep environment. Further details in 2022!

Precise location of the M8 earthquake in India in 1897

The late 19th century is the era known as the dawn of seismology: a few stations operate around the world and record waveforms on paper. Can you do real work with those data? Until now these data were considered insufficient or inaccurate. In our recent paper in The Seismic Record, we have recollected all original data, performed uncertainty analysis, and precisely calculated the seismological epicentre of the devastating earthquake that has hit the Shillong Plateau. The location confirms that the buried Oldham fault, previously suggested based on trigonometric survey data and geodetic modelling, is the source of this earthquake. The alternative scenarios, the earthquake happening on other long faults that are visible at the surface, have been ruled out. The results are likely the oldest instrumental locating of an earthquake.

Outreach summary by the Seismological Society of America

Outreach article on Temblor Earthquake News

Some of the original seismic waveforms recorded at two stations in Europe following the 1897 earthquake

Seismic survey of sub-vertical structures, Val Sesia

In preparation for the deepest drilling target of the DIVE project, the first results of the seismic reflection site survey across the Insubric Line and at the Balmuccia peridotite body have recently been published in Tectonophysics. They show that the near vertical structures seen at the surface can be continued downwards for about 1 kilometer without major disruption, which is both a methodological achievment and good news for further site investigations.

Earthquakes and Hinduism?

Yes, these two words are somehow connected. Hindiusm’s rich literature include several stories where earthquakes and related phenomena are described. And exactly these can be very useful to communicate about earthquakes to people with religious backround and religious perception of our environment. Our most recent work lead by Shiba Subedi explores this topic, which you can read in full length and in a shorter summary, including illustrations.

Summer fieldwork

Despite the varying weather conditions our group could undertake fieldwork in the area shown on the photo below. We plan to launch an open modelling challenge by sharing the new data and inviting anyone to submit models explaining the data. More details to come after data preprocessing.

Joint inversion results on the Ivrea body along Val Sesia

Our new seismic and gravity data enabled a high-resolution passive geophysical imaging study, and constrained the structure and physical properties of the Ivrea Geophysical Body along the Val Sesia profile. The structure fits well the local and regional geology, the densities and velocities fit well the rock’s properties in situ. What else? The shallowest portion of the discontinuity appears to be relatively sharp (ca. 400-600 m transition thickness). For details, see our recent Frontiers in Earth Sciences paper, lead by Matteo Scarponi. What’s next? Active geophysical results… (some patience, please).