4.7 Article

Shallow Slow Slip Events Identified Offshore the Osa Peninsula in Southern Costa Rica From GNSS Time Series

Journal

GEOPHYSICAL RESEARCH LETTERS
Volume 50, Issue 20, Pages -

Publisher

AMER GEOPHYSICAL UNION
DOI: 10.1029/2023GL104771

Keywords

shallow slow slip events; megathrust; subduction; geodesy; tectonics

Ask authors/readers for more resources

Using continuous geodetic time series, five shallow slow slip events (SSEs) were identified offshore and beneath the Osa peninsula in southern Costa Rica. These events occur approximately every 4-5 years and may potentially limit the magnitude and spatial distribution of future large ruptures.
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 similar to 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 M-w 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.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available