Unified Interior Regions

Puerto Rico

We conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens and landscapes of the Southeastern United States and the Caribbean region.

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We conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens and landscapes of the Southeastern United States and the Caribbean region.

News

Date published: May 12, 2021

USGS Scientists Add Another Piece to Puzzle of How Hurricanes Can Gain Strength

Unique observations collected by U.S. Geological Survey scientists during Hurricane María in 2017, revealed previously unknown ocean processes that may aid in more accurate hurricane forecasting and impact predictions.

Date published: October 7, 2020

Bridging the Language Barrier During the Puerto Rico Earthquake

What happens when a 6.4 magnitude earthquake strikes Puerto Rico and the public needs critical information? How does a mostly English-speaking science agency reach a mostly Spanish-speaking public?

Date published: June 22, 2020

Scientists Map Tectonic Structure Below the Seafloor of Puerto Rico

The USGS is working to identify and map faults in southern Puerto Rico, to estimate the location and magnitude of potential earthquakes.

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Date published: July 23, 2021
Status: Active

Coral Reef Project

Explore the fascinating undersea world of coral reefs. Learn how we map, monitor, and model coral reefs so we can better understand, protect, and preserve our Nation's reefs.

Date published: June 25, 2021
Status: Active

Coral Reef Project: Puerto Rico

To better understand how waves move across coral reefs and cause flooding on tropical shorelines, USGS scientists have installed video cameras and oceanographic instruments off San Juan and Rincón, Puerto Rico. Their work is part of a study funded by USGS after Hurricanes Irma and María. The offshore instruments measure wave heights and speeds; the onshore video cameras show where waves break...

Date published: May 25, 2021
Status: Active

The Value of U.S. Coral Reefs for Risk Reduction

Summary of the report, “Rigorously valuing the role of U.S. coral reefs in coastal hazard risk reduction”

    Contacts: Curt Storlazzi, PhD, Michael Beck
    Date published: December 28, 2020
    Status: Active

    Utuado, Puerto Rico Landslide Monitoring Site

    Recent Monitoring Data

    Date published: December 28, 2020
    Status: Active

    Toro Negro, Puerto Rico Landslide Monitoring Site

    Recent Monitoring Data

    Date published: October 8, 2020
    Status: Active

    Using Video Imagery to Study Wave Dynamics: Tres Palmas

    Four video cameras look westward over the coast and the coral reef at Tres Palmas in Rincón, on the west coast of Puerto Rico. Two cameras look out at the horizon and over the ocean for the mid-field view; one camera offers a zoomed-in, far-field view overlooking the reef and out to the island of Desecheo, a U.S. National Wildlife Refuge; and another camera focuses on the beach.

    Contacts: Curt Storlazzi, PhD, Miguel Canals-Silander, Patricia Chardon Maldonado
    Date published: September 12, 2020
    Status: Completed

    Susceptibility to Landslides Triggered by Intense Rainfall, Puerto Rico

    Map Depicting Susceptibility to Landslides Triggered by Intense Rainfall, Puerto Rico
    by K. Stephen Hughes and William H. Schulz

    Puerto Rico is vulnerable to landsliding. This report summarizes creation of a new high-resolution model of rainfall-induced landslide susceptibility for the main island.

    Contacts: William Schulz, K. Stephen Hughes
    Date published: August 10, 2020
    Status: Completed

    Sea-Level Rise and Climate Change Impacts to Reefs

    Learn how the USGS studies sea-level rise and climate change impacts to coral reefs.

    Date published: July 29, 2020
    Status: Active

    Landslides Triggered by the 2020 Puerto Rico Earthquake Sequence

    A magnitude 6.4 earthquake occurred near Barrio Indios, Guayanilla, Puerto Rico on January 7, 2020. A study of the triggered landslides is ongoing.

    Date published: January 15, 2020
    Status: Active

    30-day aftershock scenarios for Puerto Rico (Spanish)

    Earthquakes are unsettling, destructive, and often tragic to the communities they affect. The USGS works diligently to help keep people safer by providing them and their emergency responders the science needed to respond to ongoing hazards.

    Date published: January 15, 2020
    Status: Active

    30-day aftershock scenarios for Puerto Rico (English)

    Los terremotos, como los ocurridos en Puerto Rico, pueden ser preocupantes, destructivos y en muchas ocasiones trágicos para las comunidades afectadas.

    Date published: January 15, 2020
    Status: Active

    7-day aftershock forecast for Puerto Rico's 6.4 Magnitude Earthquake

    What we think will happen next

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    Date published: July 16, 2021

    Multichannel Seismic-Reflection and Navigation Data Collected Using SIG ELC1200 and Applied Acoustics Delta Sparkers and Geometrics GeoEel Digital Streamers During U.S. Geological Survey Field Activity 2020-014-FA, Southwest of Puerto Rico, March 2020

    In March 2020, the U.S. Geological Survey and the University of Puerto Rico Mayagüez (UPRM) Department of Marine Sciences conducted a marine seismic-reflection experiment focused on observing geophysical evidence of submarine faulting and mass wasting related to the southwestern Puerto Rico seismic sequence of 2019–20. 

    Date published: July 1, 2021

    Collection, analysis, and age-dating of sediment cores from mangrove wetlands in San Juan Bay Estuary, Puerto Rico, 2016

     We collected sediment cores to determine carbon burial rates and vertical sediment accretion from five sites in the San Juan Bay Estuary. Cores were radiometrically-dated using lead-210 and the Plum age model. Sites had soil C burial rates ranging from 50 grams per meter squared per year (g m-2 y-1) in the San José lagoon to 632 g m-2 y-1 in the Caño Martin Peña in recent decades. 

    Date published: March 26, 2021

    Cross-reef wave and water level data from coral reef environments

    Direct field observations of wave dynamics across coral reefs and the resulting water levels are limited. Here we provide direct in situ measurements of waves and water levels across a number of coral reefs, extending from the fore reef, across the reef crest, and to the shoreline. These measurements are provided to help better understand the evolution of waves across coral reefs and...

    Date published: June 19, 2020

    Inventory of landslides triggered by the 2020 Puerto Rico earthquake sequence

    Here we present an inventory of remotely and field-observed landslides triggered by 2019-2020 Puerto Rico earthquake sequence. The inventory was mapped using pre- and post-event satellite imagery (PR_landslide_inventory_imagery.csv), an extensive collection of field observations (https://doi.org/10.5066/P96QNFMB) and using pre-earthquake lidar as...

    Date published: August 14, 2019

    Geochemical and isotopic compositions of stream sediment, parent rock, and nearshore sediment from southwest Puerto Rico, April 2017-June 2018

    Geochemical and isotopic compositions were determined in stream sediment and parent rocks collected in April 2017 and June 2017 and in nearshore sediment collected bimonthly in sediment traps from May 2017 to June 2018 in the coastal zone and 12 drainages of southwest Puerto Rico: Rio Loco, Yauco, Guayanilla, Macana, Tallaboa, Matilde, Portugues, Bucana, Inabon, Jacaquas, Descalabrado, and...

    Date published: February 5, 2019

    Hydrologic Conditions of Selected Reservoirs in Puerto Rico

    The following graphs show water surface elevations above NGVD 1929 in selected reservoirs for several years, including 2015. The purpose of these graphs is to compare water surface elevations during 2015 with water surface elevations observed during years when documented droughts have occurred.

    Date published: February 5, 2019

    Hydrologic Conditions of Selected Reservoirs in Puerto Rico

    The following graphs show water surface elevations above NGVD 1929 in selected reservoirs for several years, including 2015. The purpose of these graphs is to compare water surface elevations during 2015 with water surface elevations observed during years when documented droughts have occurred.

    Date published: January 1, 2019

    Projected flooding extents and depths based on 10-, 50-, 100-, and 500-year wave-energy return periods, with and without coral reefs, for the States of Hawaii and Florida, the Territories of Guam, American Samoa, Puerto Rico, and the U.S. Virgin Islands,

    This data release provides flooding extent polygons (flood masks) and depth values (flood points) based on wave-driven total water levels for 22 locations within the States of Hawaii and Florida, the Territories of Guam, American Samoa, Puerto Rico, and the U.S. Virgin Islands, and the Commonwealth of the Northern Mariana Islands. For each of the 22 locations there are eight ass

    Date published: January 1, 2019

    Projected flood extent polygons and flood depth points based on 10-, 50-, 100-, and 500-year wave-energy return periods, with and without coral reefs, for the State of Hawaii (the islands of Hawaii, Kahoolawe, Kauai, Lanai, Maui, Molokai, Niihau, and Oahu

    This part of the data release presents projected flooding extent polygon (flood masks) and flooding depth points (flood points) shapefiles based on wave-driven total water levels for the State of Hawaii (the islands of Hawaii, Kahoolawe, Kauai, Lanai, Maui, Molokai, Niihau, and Oahu). For each island there are 8 associated flood mask and flood depth shapefiles: one for

    Date published: January 1, 2019

    Projected flood extent polygons and flood depth points based on 10-, 50-, 100-, and 500-year wave-energy return periods, with and without coral reefs, for the Territory of Puerto Rico (the islands of Culebra, Puerto Rico, and Vieques)

    This part of the data release presents projected flooding extent polygon (flood masks) and flooding depth points (flood points) shapefiles based on wave-driven total water levels for the Territory of Puerto Rico (the islands of Culebra, Puerto Rico, and Vieques). For each island there are 8 associated flood mask and flood depth shapefiles: one for each four nearshore wave energy

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    Year Published: 2021

    Land-based sediment sources and transport to southwest Puerto Rico coral reefs after Hurricane Maria, May 2017 to June 2018

    The effects of runoff from land on nearshore ecosystems, including coral reef communities, are influenced by both sediment supply and removal by coastal processes. Integrated studies across the land-sea interface describing sources and transport of terrestrial sediment and its nearshore fate allow reef protection initiatives to target...

    Takesue, Renee K.; Sherman, Clark E; Reyes, Aaron O.; Cheriton, Olivia; Ramirez, Natalia I.; Viqueira Ríos, Roberto; Storlazzi, Curt

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    Year Published: 2021

    Rapid observations of ocean dynamics and stratification along a steep island coast during Hurricane María

    Hurricanes are extreme storms that affect coastal communities, but the linkages between hurricane forcing and ocean dynamics remain poorly understood. Here, we present full water column observations at unprecedented resolution from the southwest Puerto Rico insular shelf and slope during Hurricane María, representing a rare set of high-frequency,...

    Cheriton, Olivia; Storlazzi, Curt; Rosenberger, Kurt J.; Sherman, Clark E; Schmidt, Wilford

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    Year Published: 2020

    Hillslopes in humid-tropical climates aren’t always wet: Implications for hydrologic response and landslide initiation in Puerto Rico, USA

    The devastating impacts of the widespread flooding and landsliding in Puerto Rico following the September 2017 landfall of Hurricane Maria highlight the increasingly extreme atmospheric disturbances and enhanced hazard potential in mountainous humid‐tropical climate zones. Long‐standing conceptual models for hydrologically driven hazards in Puerto...

    Thomas, Matthew A.; Mirus, Benjamin B.; Smith, Joel B.

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    Year Published: 2020

    Mobility characteristics of landslides triggered by Hurricane Maria in Puerto Rico

    Mobility is an important element of landslide hazard and risk assessments yet has been seldom studied for shallow landslides and debris flows in tropical environments. In September 2017, Hurricane Maria triggered > 70,000 landslides across Puerto Rico. Using aerial imagery and a lidar digital elevation model (DEM), we mapped and characterized...

    Bessette-Kirton, Erin K.; Coe, Jeffrey A.; Schulz, William; Cerovski-Darriau, Corina; Einbund, Mason Muir

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    Year Published: 2020

    Bathymetric survey and sedimentation analysis of Lago Carite, Puerto Rico, January 2018

    During January 23–30, 2018, the U.S. Geological Survey, in cooperation with the Puerto Rico Electric Power Authority, conducted a bathymetric survey of Lago Carite primarily to update estimates of the contemporary reservoir storage capacity and sedimentation rate. Previously designated transect lines were surveyed by using a depth sounder coupled...

    Gomez-Fragoso, Julieta
    Gómez-Fragoso, J.M., 2020, Bathymetric survey and sedimentation analysis of Lago Carite, Puerto Rico, January 2018: U.S. Geological Survey Scientific Investigations Map 3454, 1 sheet, https://doi.org/10.3133/sim3454.

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    Year Published: 2020

    Map depicting susceptibility to landslides triggered by intense rainfall, Puerto Rico

    Landslides in Puerto Rico range from nuisances to deadly events. Centuries of agricultural and urban modification of the landscape have perturbed many already unstable hillsides on the tropical island. One of the main triggers of mass wasting on the island is the high-intensity rainfall that is associated with tropical atmospheric systems. Puerto...

    Hughes, K. Stephen; Schulz, William
    Hughes, K.S., and Schulz, W.H., 2020, Map depicting susceptibility to landslides triggered by intense rainfall, Puerto Rico: U.S. Geological Survey Open-File Report 2020–1022, 91 p., 1 plate, scale 1:150,000, https://doi.org/10.3133/ofr20201022.

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    Year Published: 2020

    Potential duration of aftershocks of the 2020 southwestern Puerto Rico earthquake

    AbstractAftershocks (earthquakes clustered spatially and chronologically near the occurrence of a causative earthquake) are ongoing in southwestern Puerto Rico after a series of earthquakes, which include a magnitude 6.4 earthquake that occurred near Barrio Indios, Guayanilla, on January 7, 2020, and affected the surrounding area. This report...

    Van Der Elst, Nicholas; Hardebeck, Jeanne L.; Michael, Andrew J.
    van der Elst, N.J., Hardebeck, J.L., and Michael, A.J., 2020, Potential duration of aftershocks of the 2020 southwestern Puerto Rico earthquake: U.S. Geological Survey Open-File Report 2020–1009, 5 p., https://doi.org/10.3133/ofr20201009.

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    Year Published: 2019

    Controls on sediment transport over coral reefs off southwest Puerto Rico: Seasonal patterns and Hurricane Maria

    Guánica Bay in southwest Puerto Rico is highly turbid and has some of the highest PCB concentrations in the USA. To investigate how and to what extent the bay waters influence coral reef ecosystem health along the coastline, 6 months of hydrodynamic data were collected at 8 sites on the insular shelf. Bed shear stresses were primarily driven by...

    Cheriton, Olivia; Storlazzi, Curt D.; Rosenberger, Kurt J.; Sherman, Clark

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    Year Published: 2019

    Rigorously valuing the role of U.S. coral reefs in coastal hazard risk reduction

    The degradation of coastal habitats, particularly coral reefs, raises risks by increasing the exposure of coastal communities to flooding hazards. The protective services of these natural defenses are not assessed in the same rigorous economic terms as artificial defenses, such as seawalls, and therefore often are not considered in decision making...

    Storlazzi, Curt D.; Reguero, Borja G.; Cole, Aaron D.; Lowe, Erik; Shope, James B.; Gibbs, Ann E.; Nickel, Barry A.; McCall, Robert T.; van Dongeren, Ap R.; Beck, Michael W.
    Storlazzi, C.D., Reguero, B.G., Cole, A.D., Lowe, E., Shope, J.B., Gibbs, A.E., Nickel, B.A., McCall, R.T., van Dongeren, A.R., and Beck, M.W., 2019, Rigorously valuing the role of U.S. coral reefs in coastal hazard risk reduction: U.S. Geological Survey Open-File Report 2019–1027, 42 p., https://doi.org/10.3133/ofr20191027.

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    Year Published: 2019

    Landslides triggered by Hurricane Maria: Assessment of an extreme event in Puerto Rico

    Hurricane Maria hit the island of Puerto Rico on 20 September 2017 and triggered more than 40,000 landslides in at least three-fourths of Puerto Rico’s 78 municipalities. The number of landslides that occurred during this event was two orders of magnitude greater than those reported from previous hurricanes. Landslide source areas were commonly...

    Bessette-Kirton, Erin; Cerovski-Darriau, Corina; Schulz, William; Coe, Jeffrey A.; Kean, Jason W.; Godt, Jonathan W.; Thomas, Matthew A.; Hughes, K. Stephen

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    Year Published: 2018

    2018 hurricane and wildfire supplemental funding: USGS recovery activities

    The Additional Supplemental Appropriations for Disaster Relief Requirements Act, 2018 (P.L. 115-123), was signed by the President on February 9, 2018. This funding provided $42.2 million to the U.S. Geological Survey (USGS) for equipment repair and replacement, high-resolution elevation data collection in both hurricane- and wildfire-impacted...

    Hinck, Jo Ellen; Stachyra, Joseph
    Hinck, J.E., and Stachyra, J., 2018, 2018 hurricane and wildfire supplemental funding—USGS recovery activities: U.S. Geological Survey Fact Sheet 2018–3063, 4 p., https://doi.org/10.3133/fs20183063.

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    Year Published: 2018

    Seismic sensors record a hurricane’s roar

    The instruments installed at Global Seismographic Network (GSN) stations were designed to record Earth’s vibrations, but they sometimes pick up sound waves from unexpected sources. For example, newly installed infrasound sensors at a station on Puerto Rico recorded the passage of Hurricane Maria on 20 September 2017.

    Wilson, David C.; Davis, Peter; Ebeling, Carl; Hutt, Charles R.; Hafner, Katrin
    Wilson, D. C., P. Davis, C. Ebeling, C. R. Hutt, and K. Hafner (2018), Seismic sensors record a hurricane’s roar, Eos, 99, https://doi.org/10.1029/2018EO102963. Published on 03 August 2018.

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    multicolored map of Ocean Shores, Washington
    April 13, 2017

    The Pedestrian Evacuation Analyst is an ArcGIS extension that estimates how long it would take for someone to travel on foot out of a hazardous area that was threatened by a sudden event such as a tsunami, flash flood, or volcanic lahar. It takes into account the elevation changes and the different types of landcover that a person would encounter along the way.

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    A series of three images arranged side by side, one a map of an island, one zoomed to the island study area, and a plot of data.
    May 12, 2021

    Puerto Rico study area and Hurricane María path and data

    (Left) Map of Puerto Rico showing study area location (red box), the oceanographic buoys (orange triangles), and the track of María with eye timing and locations (black dots) in 6-hour increments and the wind radii of 64-knot winds (gray circular outlines).

    (Middle) Study area showing location of nearshore shelf instrument packages

    ...
    November 12, 2020

    Climate Adaptation to Support Amphibian Conservation in U.S. Caribbean

    Climate change will strongly affect tropical island ecosystems. The risks of significant negative impacts are likely to be higher in these island systems than in many temperate regions of the world because of the limited size of their land masses, high numbers of species that only exist in narrowly defined regions, and expectations that tropical environments will

    June 28, 2020

    Red Devil Cichlid (Amphilophus labiatus) Guarding Habitat

    Multiple stressors such as climate change impacts and invasive species can have compounding impacts on native inland fish. Published literature is limited on how climate change will impact native tropical fish species, such as those in the Caribbean, and even less is known about how multiple stressors such as extreme flow events and presence of non-native competitors could

    Map of seismic research site on seafloor off Puerto Rico
    April 30, 2020

    Scientists find signs of undersea faults off SW Puerto Rico

    Locations of multichannel seismic reflection profiles (in black), collected during cruise FA2020-14. The profiles are overlain on colored and shaded multibeam bathymetry, Lidar topography (green and white) and near-shore bathymetry (darker blue), and NOAA coastal relief model (light blue and white). Dashed purple lines – hypothesized faults from the distribution of

    ...
    Scientist on research vessel prepares to launch hydrophone
    March 5, 2020

    Scientist launches instrument used to map seafloor off Puerto Rico

    USGS marine technician Wayne Baldwin prepares to deploy the hydrophone array during a seismic research cruise off the southwest coast of Puerto Rico on board the R/V Sultana in March 2020.

    Marine technician deploy a hydrophone off Puerto Rico
    March 5, 2020

    USGS marine technicians launch a hydrophone off Puerto Rico seafloor

    USGS marine technicians Alex Nichols (L) and Eric Moore (R) deploy the hydrophone array on a seismic research cruise off the southwest coast of Puerto Rico aboard the R/V Sultana in March 2020.

    USGS technicians launch "sparker" used in seafloor mapping
    March 5, 2020

    Three scientists launch a "sparker" used in seafloor mapping

    USGS research geologist Jason Chaytor (L) and marine technicians Alex Nichols (center) and Eric Moore (R) deploy the “sparker” sound source on a seismic research cruise off the southwest coast of Puerto Rico aboard the R/V Sultana in March 2020.

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    January 29, 2020

    2020 Southwest Puerto Rico Earthquake Sequence (Jan 29, 2020)

    The U.S. Geological Survey has released a report on the potential duration of aftershocks of the 2020 Southwest Puerto Rico earthquake sequence (series) to guide public policy decisions, other actions, and help people stay safe and care for themselves and each other.

    i) AFTERSHOCK FORECAST*
    Aftershocks are normal and some will be larger than others, but there

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    January 29, 2020

    Secuencia del Terremoto del 2020 en el Suroeste de Puerto Rico

    El Servicio Geológico de los EE. UU. ha publicado un informe sobre la duración potencial de las réplicas de la secuencia (serie) del terremoto del Suroeste de Puerto Rico en el 2020 que puede ser usado como guía en las decisiones de política pública, otras acciones y ayudar a las personas a mantenerse seguras y cuidarse a sí mismas y a los demás.

     

    i

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    Dianne López-Trujillo with Lynne Carrier, FEMA translator.
    January 28, 2020

    Dianne López-Trujillo with Lynne Carrier, FEMA translator

    Dianne López-Trujillo with Lynne Carrier, FEMA translator.

    The USGS Recognizes Dianne Lopez-Trujillo During Hispanic Heritage Month

    What happens when a 6.4 magnitude earthquake strikes Puerto Rico and the public needs critical information? How does a mostly English-speaking science agency reach a mostly Spanish-speaking public?

    The USGS relies on its

    ...
    Congressional event following the 6.4 earthquake in Puerto Rico
    January 19, 2020

    Congressional event following the 6.4 earthquake in Puerto Rico

    Overview of the Congressional event following the 6.4 earthquake in Puerto Rico. Bottom of picture: congressmen. Center: Dianne Lopez, Lindsay Davis, Donyelle Davis

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    Underwater instrument package that collected unique, high-resolution underwater ocean observations during Hurricane María.
    May 12, 2021

    Unique observations collected by U.S. Geological Survey scientists during Hurricane María in 2017, revealed previously unknown ocean processes that may aid in more accurate hurricane forecasting and impact predictions.

    USGS team with Wanda Vazquez-Garced, governor of Puerto Rico
    October 7, 2020

    What happens when a 6.4 magnitude earthquake strikes Puerto Rico and the public needs critical information? How does a mostly English-speaking science agency reach a mostly Spanish-speaking public?

    Marine technician deploy a hydrophone off Puerto Rico
    June 22, 2020

    The USGS is working to identify and map faults in southern Puerto Rico, to estimate the location and magnitude of potential earthquakes.

    Map of seismic research site on seafloor off Puerto Rico
    May 26, 2020

    Most residents of southern Puerto Rico were startled by the sequence of earthquakes that began Dec. 28, 2019 and included a magnitude 6.4 quake on Jan. 7, 2020. Aftershocks are expected to continue for years, including some relatively strong ones, like a May 2 magnitude 5.4 temblor

    A map of the magnitude 5.4 Earthquake Felt in Puerto Rico showing it hit about six miles offshore on the south side of island
    May 2, 2020

    On May 2, 2020, a  magnitude 5.4 earthquake struck about 4 miles offshore of Tallaboa, Puerto Rico, at a depth of about 5-6 miles (9 kilometers). This story will be updated if/when more information becomes available.

    Aeirial view of landslides blocking roads  in Utuado, Puerto Rico
    March 19, 2020

    A new U.S. Geological Survey map of Puerto Rico shows the relative risks of landslides due to the kind of intense rainfall brought on by hurricanes. It identifies 20%  of the island as at high risk, 9% at very high risk, and 1% at extremely high risk of landslides under those conditions. 

    A road damaged by a landslide in Puerto Rico.
    February 6, 2020

    A new landslide guidebook released February 5 is now available for Puerto Rico residents to learn more about the landslide hazards that can impact the island.

    Magnitude 5.8 in Puerto Rico
    January 29, 2020

    Links to forecasts and scenerios (below) will continue to be updated, however, text in this story will not be updated unless there is significant change to the aftershock behavior or to the USGS response to the earthquake. 

    7-day aftershock forecast [English]

    30-day aftershock scenarios [English | Spanish]

    seismic stations
    January 17, 2020

    A sequence of earthquakes in southwest Puerto Rico continues to affect people living there, with the largest recent aftershock a magnitude 5.2 on Jan. 15. U.S. Geological Survey scientists on the island and the mainland are providing up-to-date scientific information to help the Commonwealth government and the Federal Emergency Management Agency make decisions that protect the public.

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    January 16, 2020

    Earthquake Aftershock Forecast and Scenarios

    PuertoRico Quake
    January 15, 2020

    Earthquake Aftershock Forecast and Scenarios

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