Servicio Nacional

Repositorio Geofísico Nacional (REGEN)

El Instituto Geofísico del Perú promueve la investigación científica y pone a disposición esta plataforma de libre acceso para compartir conocimientos generados en el campo de las geociencias.

Conoce más Recursos

"El conocimiento de las geociencias a tu alcance"

Photo by @IGPPeru

A través del Repositorio Geofísico Nacional (REGEN), el IGP organiza su producción científica en comunidades que reúnen todo el conocimiento científico obtenido a lo largo de más de 100 años de investigación

Ciencias de la Tierra Sólida

Ciencias del Geoespacio

Formación profesional

Impacto de la Geofísica en el Desarrollo Sostenible

Institucional

Instrumentación Geofísica y Desarrollo Tecnológico

Ciencias de la Atmósfera, Hidrosfera y Cambio Climático

Ciencias de la Tierra Sólida

Ciencias del Geoespacio

Formación profesional

Impacto de la Geofísica en el Desarrollo Sostenible

Institucional

Instrumentación Geofísica y Desarrollo Tecnológico

Ciencias de la Atmósfera, Hidrosfera y Cambio Climático

Ciencias de la Tierra Sólida

Ciencias del Geoespacio

Formación profesional

Impacto de la Geofísica en el Desarrollo Sostenible

Institucional

Últimos ingresos

Estadísticas

Enlaces de Referencias

Ítem

Restringido

Monitoring the Equatorial Ionosphere With the Upgraded Unattended Mode at Jicamarca

(Wiley, 2026-04-07) Flores, Roberto; Manay, I.; Condor Patilongo, Percy; Kuyeng, Karim; Scipión, Danny; Milla, Marco

For several years, the Geophysical Institute of Peru (IGP) has monitored the equatorial ionosphere using its main ionospheric radar located at the Jicamarca Radio Observatory. The radar operated in two standard modes: the Incoherent Scatter Radar (ISR) mode, which employs up to 4 High Power Large-Aperture amplifiers with a peak power of 1 MW each and 5% duty cycle, to measure plasma drifts, electron and ion temperatures, and composition, typically operating about 1,000 hr per year; and the Jicamarca Unattended Long-term investigations of the Ionosphere and Atmosphere (JULIA) mode, which used low-power amplifiers (∼20 kW) to study equatorial ionospheric irregularities such as the Equatorial Electrojet, the Equatorial Spread-F, and the 150-km echoes, operating approximately 4,000 hr per year. In 2022, two solid-state transmitters, each with a peak power of 96 kW and duty cycle of 10% were installed to enable unattended ISR measurements, making it possible to combine certain features of the ISR mode and JULIA mode, such as vertical and zonal plasma drifts up to 500 km and the measurements of coherent equatorial echoes like Equatorial Electrojet, 150-km echoes and Equatorial Spread-F. With this new JULIA - Medium Power (JULIA-MP) mode, the observations of equatorial ionospheric parameters have increased to approximately 5,000 hr per year. This paper presents the new JULIA-MP mode, outlining the experimental setup and summarizing the data statistics registered during 2024.

Palabras clave:JULIA-MP Vertical drifts Jicamarca

Ítem

Acceso Abierto

Boletín sísmico mensual (marzo 2026)

(Instituto Geofísico del Perú, 2026-03) Instituto Geofísico del Perú

Durante el mes de marzo de 2026, el Centro Sismológico Nacional (CENSIS) reportó la ocurrencia de 69 sismos con epicentros en el borde occidental y dentro del territorio peruano.

Palabras clave:Sismos Sismicidad Sismología

Ítem

Acceso Abierto

A New Global Climatological Model of the Equatorial Ionospheric Vertical E × B Drift: Integrating Ground‐Based Magnetometer, Radar, and Satellite Data Sets

(Advancing Earth and Space Science, 2026-04-01) Habarulema, John Bosco; Okoh, Daniel; Yizengaw, Endawoke; Habyarimana, Valence; Pezzopane, Michael; Fagundes, Paulo Roberto; Katamzi-Joseph, Zama; Moldwin, Mark B.; Cesaroni, Claudio; Scipión, Danny

We present a new empirical vertical E×B drift model developed using ground-based magnetometer, radar, and satellite data over equatorial latitude regions. We first implement an algorithm relating magnetometer derived equatorial electrojet (EEJ) and vertical ion plasma drift (equivalent to vertical E×B drift within magnetic latitudes of ±5° and altitudes of about 400–550 km) from the Communications and Navigation Outage Forecasting System (C/NOFS) satellite at different longitude sectors. The relationship between EEJ and C/NOFS vertical E×B drift is developed separately at different longitudes over the globe at coincidental times when both data sets are available. These relationships are then used to estimate continuous vertical E×B drift at each epoch of EEJ observation over the respective longitude sectors during local daytime. The reconstructed vertical E×B drift data are combined with global C/NOFS vertical E×B drifts and JULIA data set to develop a global vertical E×B drift model. Validation using Ion Velocity Meter (IVM) drifts from ICON satellite for January to August 2022 shows that our model improves vertical E×B drift global modeling by over 20% compared to the current climatology representation.

Palabras clave:Equatorial ionosphere Vertical E×B drift Equatorial electrojet (EEJ)

Ítem

Acceso Abierto

Informe Técnico Nº PpR/El Niño-IGP/2026-02

(Instituto Geofísico del Perú, 2026-03-23) Instituto Geofísico del Perú

Hasta mayo se espera el arribo de ondas de Kelvin cálidas a la costa peruana. Aún es incierta la energía con la que arribarían; sin embargo, no se descarta que contribuyan a un incremento de la TSM o a mantener las condiciones actuales. Asimismo, de presentarse un calentamiento, podrían desarrollarse lluvias intensas, principalmente en la zona norte del Perú. A una escala mayor, los modelos del NMME sugieren, por un lado, la posible extensión de El Niño costero hasta el próximo año y, por otro, el desarrollo de un evento El Niño en el Pacífico central a partir de junio. No obstante, la presencia de la barrera de predictibilidad limita la confiabilidad de estos pronósticos más allá de abril.

Palabras clave:El Niño Fenómeno El Niño Temperatura del océano

Ítem

Restringido

Topside Equatorial Ionospheric Plasma Density, Temperature, Composition, and Drifts Measurements at Jicamarca Under June Solstice, Moderate Solar Flux Conditions

(John Wiley and Sons, 2026-02-05) Hysell, D.L.; Varney, R.H; Scipión, Danny; Kuyeng, Karim; Huba, J.D.

State parameter profiles in the equatorial topside ionosphere were measured in June, 2023, and late July and early August, 2025, at the Jicamarca Radio Observatory. The measurements combined multiple radar pulsing schemes and analysis methods. In 2025, for the first time, plasma drifts were measured concurrently with electron densities, electron and ion temperatures, and ion composition by exploiting a new electronic beam steering capability. Significant quiet-time day-to-day variability is evident across all measurements. In this study, variability in the vertical drifts is considered as a source of variability in the other plasma state parameters. Topside temperatures and the midday temperature depression in particular are examined for sensitivity to vertical drifts. While predictions obtained from the SAMI2-PE model, which includes energetic electron transport, exhibit reasonable agreement with observations overall, they do not account for topside variability. Some limitations of the measurements and the model along with strategies for improvement and further study are discussed.

Palabras clave:Electric fields Incoherent scatter Ionosphere