Shallow slow slip events identified offshore the Osa peninsula in Southern Costa Rica from GNSS time series
Using new continuous geodetic time series, we identify five shallow slow slip events (SSEs) offshore and beneath the Osa peninsula in southern Costa Rica. An early event was detected by one station in 2013, and two events occurring in close succession in both 2018 and 2022 were detected by multiple...
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sg-ntu-dr.10356-1713482023-10-24T15:36:29Z Shallow slow slip events identified offshore the Osa peninsula in Southern Costa Rica from GNSS time series Perry, Mason Muller, Cyril Protti, Marino Feng, Lujia Hill, Emma M. Asian School of the Environment Earth Observatory of Singapore Science::Physics::Geophysics and geomagnetism Science::Geology::Volcanoes and earthquakes Slow Slip Events GNSS Subduction Zone Using new continuous geodetic time series, we identify five shallow slow slip events (SSEs) offshore and beneath the Osa peninsula in southern Costa Rica. An early event was detected by one station in 2013, and two events occurring in close succession in both 2018 and 2022 were detected by multiple stations, indicating a preliminary recurrence interval of ~4-5 years. While SSEs have been observed to the northwest at Nicoya, this is their first documentation in southern Costa Rica. Modeled slip distributions of the 2018 and 2022 events indicate they likely ruptured the same or overlapping patches of the plate interface, near the trench, updip of the 1983 Mw 7.4 Osa event. Immediately offshore, estimated cumulative slip from the 2018 and 2022 events is sufficient to close the slip deficit from tectonic loading over the recurrence interval, potentially limiting the magnitude and spatial slip distribution of future large ruptures. Ministry of Education (MOE) National Research Foundation (NRF) Published version This research was supported by the National Research Foundation Singapore under its Singapore NRF Inves- tigator scheme (NRF-NRFI05-2019-0009 to E.M.H.), and by the Earth Observatory of Singapore via its funding from the National Research Foundation Singapore and the Singapore Ministry of Education under the Research Centres of Excellence initiative. 2023-10-20T08:18:02Z 2023-10-20T08:18:02Z 2023 Journal Article Perry, M., Muller, C., Protti, M., Feng, L. & Hill, E. M. (2023). Shallow slow slip events identified offshore the Osa peninsula in Southern Costa Rica from GNSS time series. Geophysical Research Letters, 50(20), e2023GL104771-. https://dx.doi.org/10.1029/2023GL104771 0094-8276 https://hdl.handle.net/10356/171348 10.1029/2023GL104771 20 50 e2023GL104771 en NRF-NRFI05-2019-0009 Geophysical Research Letters 10.21979/N9/H9AFJJ © 2023 The Authors.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. application/pdf |
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Science::Physics::Geophysics and geomagnetism Science::Geology::Volcanoes and earthquakes Slow Slip Events GNSS Subduction Zone Perry, Mason Muller, Cyril Protti, Marino Feng, Lujia Hill, Emma M. Shallow slow slip events identified offshore the Osa peninsula in Southern Costa Rica from GNSS time series |
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Using new continuous geodetic time series, we identify five shallow slow slip events (SSEs) offshore and beneath the Osa peninsula in southern Costa Rica. An early event was detected by one station in 2013, and two events occurring in close succession in both 2018 and 2022 were detected by multiple stations, indicating a preliminary recurrence interval of ~4-5 years. While SSEs have been observed to the northwest at Nicoya, this is their first documentation in southern Costa Rica. Modeled slip distributions of the 2018 and 2022 events indicate they likely ruptured the same or overlapping patches of the plate interface, near the trench, updip of the 1983 Mw 7.4 Osa event. Immediately offshore, estimated cumulative slip from the 2018 and 2022 events is sufficient to close the slip deficit from tectonic loading over the recurrence interval, potentially limiting the magnitude and spatial slip distribution of future large ruptures. |
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Asian School of the Environment |
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Asian School of the Environment Perry, Mason Muller, Cyril Protti, Marino Feng, Lujia Hill, Emma M. |
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Article |
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Perry, Mason Muller, Cyril Protti, Marino Feng, Lujia Hill, Emma M. |
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Perry, Mason |
title |
Shallow slow slip events identified offshore the Osa peninsula in Southern Costa Rica from GNSS time series |
title_short |
Shallow slow slip events identified offshore the Osa peninsula in Southern Costa Rica from GNSS time series |
title_full |
Shallow slow slip events identified offshore the Osa peninsula in Southern Costa Rica from GNSS time series |
title_fullStr |
Shallow slow slip events identified offshore the Osa peninsula in Southern Costa Rica from GNSS time series |
title_full_unstemmed |
Shallow slow slip events identified offshore the Osa peninsula in Southern Costa Rica from GNSS time series |
title_sort |
shallow slow slip events identified offshore the osa peninsula in southern costa rica from gnss time series |
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2023 |
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https://hdl.handle.net/10356/171348 |
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