12 articles in this issue
Jouni J. Takalo
We analyze the temporal distribution of sunspot groups for even and odd cycles in the range SC12- SC24. It seems that cycle 24 is a characteristic even cycle, although with low amplitude. The number of large sunspot groups for cycle 24 is relatively small... see more
Maria Mehmood,Sajid Saleem,Renato Filjar,Najam Abbas Naqvi,Arslan Ahmed
Many organizations allow GNSS users to access Global Ionosphere Maps (GIMS). However, the TEC estimates derived from GIMs are of insufficient quality to describe small-scale TEC variations over Pakistan. In this paper, the first local TEC map over Pakista... see more
Dario Camuffo
An investigation is made on the environmental factors that may determine the seasonal cycle of respiratory affections. The driving role of temperature is examined, for its inverse synergism with the dissolution of oxygen in human plasma. Two best-fit equa... see more
An unusual instrument, named “Barothermometer”, belonging to the collection of Villa Vigoni, on the Como Lake, Italy, is analysed. The instrument is composed of a U-shaped thermoscope and a spirit thermometer. Both instruments have their tubes placed side... see more
Rosalba Napoli,Gilda Currenti,Antonino Sicali
A ground magnetic study was performed on the northern upper flank of Mt. Etna to provide new insights into subsurface volcano-tectonic structures. The high resolution magnetic survey was focused on the main structures of Piano delle Concazze, a large flat... see more
Jon Bruno,Francesco Darugna,Karl Bolmgren,Jannes B Wübbena,Cathryn Mitchell,Martin Schmitz
The growing quality of smartphone-based Global Navigation Satellite Systems (GNSS) chipsets opens a new frontier for scientific research in positioning, navigation and timing applications. The portability and affordability of these instruments could enhan... see more
Christian Foka Fogang,Francois Beceau Pelap,Guy Bertrand Tanekou,Romanic Kengne,Laurent Ymele Kagho,Theophile Fozin Fozing,Roméo Blaise Nana Mbendjo,Fidèle Koumetio
In this work, we examine the dynamical behaviour of the “single mass-springs” model for earthquake subjected to the strength due to the up flow of magma for the period of volcanism, considering the fractional viscous damping force, the fractional weakenin... see more
Franco Foresta Martin,Silvia Peppoloni,Patrizia Tosi,Valerio De Rubeis,Paola Sbarra,Sonia Topazio
This research was inspired by an old stereoscopic viewer from the early 1900s, containing 42 glass slides depicting scenes from two Italian earthquakes that struck Southern Calabria and Eastern Sicily in the years 1894 and 1905, causing hundreds of deaths... see more
Antonio Costanza,Gioacchino Fertitta,William Yang,Giuseppe D'Anna,Claudio Chiarabba
PGS1 is a new compact portable seismic station, designed at INGV OBS and Earth Lab, that is specifically intended for the deployment of dense arrays of seismographs on-shore. With its low cost, compact design, high data-quality and long battery life, PGS1... see more
Xiang Min,Qi Xinghua,Zhang Fengwei
Rayleigh wave detection is a recently developed method for shallow seismic exploration. Current Rayleigh wave data processing and interpretation methods can only provide the transverse average wave velocity of rock-soil bodies under the geophone array ran... see more
Zhanyuan Liang,Guochen Wu,Xiaoyu Zhang,Qingyang Li
Reflection full-waveform inversion (RFWI) can reduce the nonlinearity of inversion providing an accurate initial velocity model for full-waveform inversion (FWI) through the tomographic components (low-wavenumber). However, elastic-wave reflection full-wa... see more
Carlo Meletti,Warner Marzocchi,Vera D'Amico,Giovanni Lanzano,Lucia Luzi,Francesco Martinelli,Bruno Pace,Andrea Rovida,Matteo Taroni,Francesco Visini,MPS19 Working Group
We describe the main structure and outcomes of the new probabilistic seismic hazard model for Italy, MPS19 [Modello di Pericolosita` Sismica, 2019]. Besides to outline the probabilistic framework adopted, the multitude of new data that have been made avai... see more