Radon tides on an active volcanic island: Terceira, Azores
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| Formato: | Artículo científico |
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Universidad Nacional Autónoma de México
2002
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| contents | Radon tides on an active volcanic island: Terceira, Azores F. Aumento Ciencias de la Tierra Luni Radon tides earthquake prediction marine and earth tides Solar gravitational forces Twelve synchronous, continuously recording underground radon monitoring stations on the geothermally and tectonicallyactive volcano Pico Alto, Terceira Island, Azores, are used to identify and quantify underground radon movements. Findingsinclude:(1) Meteorological variations have negligible effects on underground radon emanations.(2) As a function of lunar month, radon emanations generate repetitive patterns in time and magnitude for several consecutivemonths (at least one year). Deviations from the established pattern indicate that additional, non-systematic events influencedradon emanations.(3) Underground radon behaves as a continuous body, much like an aquifer. It exhibits tides, distinct from marine and earthtides. Radon tidal ages have a negative magnitude, with emanation maxima occurring some days before the luni-solarconjunction and/or opposition. Absolute radon maxima are associated with the Full Moon in contrast to marine tidal maxima,which occur at New Moon.(4) Radon emanations give rise to two maxima per day, one at dawn, the other at sunset. Peak times and separations vary with theseason, depending on variations in the length of day.(5) Marine tides influence the radon body along faults directly connected to the sea. These tidal effects are in the form of physicalpumping action on buried aquifers and radon masses.(6) On Terceira Island, stations respond either to the stress system of the regional Azores/Gibraltar tectonic regime (NW-SE), or tothe local NE-SW Pico Alto Volcano regime. Emanation maxima were seen to shift from one system to another as differenttectonic regimes came into play. 2002 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56841422 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.4 Vol.41 |
| format | Artículo científico |
| id | redalyc_56841422 |
| institution | Redalyc |
| language | en |
| publishDate | 2002 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Radon tides on an active volcanic island: Terceira, Azores F. Aumento Ciencias de la Tierra Luni Radon tides earthquake prediction marine and earth tides Solar gravitational forces Radon tides on an active volcanic island: Terceira, Azores F. Aumento Ciencias de la Tierra Luni Radon tides earthquake prediction marine and earth tides Solar gravitational forces Twelve synchronous, continuously recording underground radon monitoring stations on the geothermally and tectonicallyactive volcano Pico Alto, Terceira Island, Azores, are used to identify and quantify underground radon movements. Findingsinclude:(1) Meteorological variations have negligible effects on underground radon emanations.(2) As a function of lunar month, radon emanations generate repetitive patterns in time and magnitude for several consecutivemonths (at least one year). Deviations from the established pattern indicate that additional, non-systematic events influencedradon emanations.(3) Underground radon behaves as a continuous body, much like an aquifer. It exhibits tides, distinct from marine and earthtides. Radon tidal ages have a negative magnitude, with emanation maxima occurring some days before the luni-solarconjunction and/or opposition. Absolute radon maxima are associated with the Full Moon in contrast to marine tidal maxima,which occur at New Moon.(4) Radon emanations give rise to two maxima per day, one at dawn, the other at sunset. Peak times and separations vary with theseason, depending on variations in the length of day.(5) Marine tides influence the radon body along faults directly connected to the sea. These tidal effects are in the form of physicalpumping action on buried aquifers and radon masses.(6) On Terceira Island, stations respond either to the stress system of the regional Azores/Gibraltar tectonic regime (NW-SE), or tothe local NE-SW Pico Alto Volcano regime. Emanation maxima were seen to shift from one system to another as differenttectonic regimes came into play. 2002 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56841422 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.4 Vol.41 |
| title | Radon tides on an active volcanic island: Terceira, Azores |
| topic | Ciencias de la Tierra Luni Radon tides earthquake prediction marine and earth tides Solar gravitational forces |
| url | https://www.redalyc.org/articulo.oa?id=56841422 |