Overall Green Volcanic eruption for Poas in Costa Rica on 27 Mar 2025 07:50 UTC

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Overall Green Volcanic eruption for Poas

in Costa Rica

Event summary

Volcanic eruption Poas is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Name:	Poas
Lat/Lon:	10.2 , -84.233
Event Date:	23 Apr 2025 07:39 UTC
Exposed Population 30km:	About 1390000 people within 30km
Exposed Population 100km:	About 4210000 people within 100km
Max Volc. Explosivity Index VEI:	2
Population exposure index:	5
Inserted at:	27 Mar 2025 06:50 UTC

GDACS Score

For more info on GDACS score click here.

Historical Timeline

Volcano Timeline

ID	Level	Date	Eruption Details	Source
1		27 Mar 2025 07:50		JRC
2		23 Apr 2025 07:39		WASHINGTON

Exposed population

The eruption happened in Costa Rica , Province of Alajuela (population 578,124) . The nearest places are San Juan Norte, Altura, Poasito, Finca Ines, Toro, Fraijanes, Cabuyal, Bajos del Toro, Cinchona, Buena Vista, and Sardinal.

Radius	Population
100 km	4.2 million people
75 km	3.9 million people
50 km	3.2 million people
30 km	1.4 million people
20 km	300000 people
10 km	15000 people
5 km	<1000 people
2 km	<1000 people

Detailed event map. European Union, 2026. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

Affected Provinces

Region Province	Country	Population
Alajuela	Costa Rica	580000 people
Heredia	Costa Rica	300000 people
San Jose	Costa Rica	1.2 million people

Affected populated places

Name	Region Province	Country	City class	Population	Distance
San Juan Norte	Alajuela	Costa Rica	Village	-	5 km
Altura	Alajuela	Costa Rica	Village	-	5 km
Poasito	Alajuela	Costa Rica	Village	-	6 km
Finca Ines	Alajuela	Costa Rica	Village	-	6 km
Toro	Alajuela	Costa Rica	Village	-	7 km
Fraijanes	Alajuela	Costa Rica	Village	-	7 km
Cabuyal	Alajuela	Costa Rica	Village	-	7 km
Bajos del Toro	Alajuela	Costa Rica	Village	-	7 km
Cinchona	Alajuela	Costa Rica	Village	-	7 km
Buena Vista	Alajuela	Costa Rica	Village	-	8 km
Montaña Azul	Heredia	Costa Rica	Village	-	8 km
Pueblo Nuevo	Alajuela	Costa Rica	Village	-	9 km
Alto Palomo	Alajuela	Costa Rica	Village	-	9 km
Finca Margarita	Alajuela	Costa Rica	Village	-	9 km
Vara Blanca	Heredia	Costa Rica	Village	-	9 km
Cariblanco	Alajuela	Costa Rica	Village	-	9 km
Sabana Redonda	Alajuela	Costa Rica	Village	-	9 km
Cartagos	Alajuela	Costa Rica	Village	-	10 km
San Isidro	Alajuela	Costa Rica	Village	-	10 km
Ujarraz	Alajuela	Costa Rica	Village	-	10 km
Angeles (Pata de Gatto)	Alajuela	Costa Rica	Village	-	11 km
Trojas	Alajuela	Costa Rica	Village	-	11 km
Dulce Nombra	Alajuela	Costa Rica	Village	-	11 km
San Luis	Alajuela	Costa Rica	Village	-	11 km
Colonia Virgen del Socorro	Alajuela	Costa Rica	Village	-	11 km
Concordia	Alajuela	Costa Rica	Village	-	11 km
Colonia del Toro	Alajuela	Costa Rica	Village	-	11 km
Los Angeles	Alajuela	Costa Rica	Village	-	12 km
San Rafael	Heredia	Costa Rica	Village	-	12 km
Cerrillal	Alajuela	Costa Rica	Village	-	12 km
Cineo Esquinas	Alajuela	Costa Rica	Village	-	13 km
San Miguel	Alajuela	Costa Rica	Village	-	13 km
Picado	Alajuela	Costa Rica	Village	-	14 km
Sabanilla	Alajuela	Costa Rica	Village	1000 people	14 km
San Pedro	Alajuela	Costa Rica	Village	-	14 km
Ángeles	Alajuela	Costa Rica	Village	-	14 km
Poas	Alajuela	Costa Rica	Village	-	14 km
Los Mesen	Alajuela	Costa Rica	Village	-	15 km
Finca la Macha	Heredia	Costa Rica	Village	-	15 km
Carmen	Alajuela	Costa Rica	Village	-	15 km
San Jerónimo	Alajuela	Costa Rica	Village	-	15 km
Robles	Alajuela	Costa Rica	Village	-	15 km
Carrizal	Alajuela	Costa Rica	Village	-	15 km
Crucero	Alajuela	Costa Rica	Village	-	15 km
San José de la Montaña	Alajuela	Costa Rica	Village	-	16 km
Colonia Jesus Maria	Heredia	Costa Rica	Village	-	16 km
Pilas	Alajuela	Costa Rica	Village	-	16 km
Sacramento	Heredia	Costa Rica	Village	-	16 km
Roble	Heredia	Costa Rica	Village	-	16 km
Palmira	Alajuela	Costa Rica	Village	-	16 km
Llano Bonito (Cirri Norte)	Alajuela	Costa Rica	Village	-	16 km
Santa Gertrudis	Alajuela	Costa Rica	Village	-	16 km
Aguna Rio Cuarto	Alajuela	Costa Rica	Village	-	16 km
Itiquís	Alajuela	Costa Rica	Village	-	17 km
Corazón de Jesús	Alajuela	Costa Rica	Village	-	17 km
Marsella	Alajuela	Costa Rica	Village	-	17 km
Grecia	Alajuela	Costa Rica	Village	12000 people	17 km
Poza Azul	Heredia	Costa Rica	Village	-	17 km
Sarchi Norte	Alajuela	Costa Rica	Village	-	18 km
Porrosatí	Heredia	Costa Rica	Village	-	18 km
Tuetal Norte	Alajuela	Costa Rica	Village	-	18 km
Venecia	Alajuela	Costa Rica	Village	-	18 km
Zarcero	Alajuela	Costa Rica	Village	3500 people	18 km
La Legua	Alajuela	Costa Rica	Village	-	18 km
Birrí	Heredia	Costa Rica	Village	-	18 km
Rincon de Arias	Alajuela	Costa Rica	Village	-	19 km
Laguna	Alajuela	Costa Rica	Village	<1000 people	19 km
San Juanillo	Alajuela	Costa Rica	Village	-	19 km
Carrizal	Alajuela	Costa Rica	Village	-	19 km
Tapesco	Alajuela	Costa Rica	Village	-	19 km
Puente de Piedra	Alajuela	Costa Rica	Village	-	19 km
San Ramon	Heredia	Costa Rica	Village	-	19 km
Santa Barbara	Heredia	Costa Rica	Village	-	19 km
Tacares	Alajuela	Costa Rica	Village	-	20 km
La Union	Alajuela	Costa Rica	Village	-	20 km
Finca San Jose	Heredia	Costa Rica	Village	-	20 km
Naranjo	Alajuela	Costa Rica	Village	12000 people	20 km
San Vicente	Alajuela	Costa Rica	Village	-	20 km
San José de la Montaña	Heredia	Costa Rica	Village	-	20 km
San Jose Sur	Heredia	Costa Rica	Village	-	20 km
Alajuela	Alajuela	Costa Rica	City	47000 people	20 km
San Juan	Alajuela	Costa Rica	Village	-	20 km
San Antonio de Barranca	Alajuela	Costa Rica	Village	-	21 km
Ángeles	Alajuela	Costa Rica	Village	-	21 km
Bella Vista	Alajuela	Costa Rica	Village	-	21 km
San Juan Abajo	Heredia	Costa Rica	Village	-	21 km
Montecito	Heredia	Costa Rica	Village	-	21 km
Cuesta Colorada	Alajuela	Costa Rica	Village	-	21 km
Buenos Aires	Alajuela	Costa Rica	Village	-	21 km
Zapote	Alajuela	Costa Rica	Village	-	21 km
Porvenir	Alajuela	Costa Rica	Village	-	22 km
Getsemaní	Heredia	Costa Rica	Village	-	22 km
Rincon de Salas	Alajuela	Costa Rica	Village	-	22 km
San Pablo	Heredia	Costa Rica	Village	-	22 km
Alto Jimenez	Alajuela	Costa Rica	Village	-	22 km
Ánimas	Alajuela	Costa Rica	Village	-	22 km
Bajo Latas (Fatima)	Alajuela	Costa Rica	Village	-	22 km
Río Segundo	Alajuela	Costa Rica	Village	-	22 km
Aguas Zarcas	Alajuela	Costa Rica	Village	-	22 km
El Bosque	Heredia	Costa Rica	Village	-	22 km

see full list

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name	IATA Code	Elevation (m)	Usage	Runway type	IFR	Runway Length (ft)	Distance
Juan Santamaria International	SJO	921	Civ.	Paved	Yes	9800	23 km
Tobias Bolanos International	SYQ	994	Civ.	Paved	No	3200	29 km
Rio Frio	RFR	unknown				0	41 km
Guapiles	GPL	269	Civ.	Paved	No	3600	48 km
San Pedro		64				0	55 km
Santa Clara de Guapiles		80	Civ.	Paved	No	3100	58 km
Chacarita		2	Civ.	Paved	No	4900	64 km
Santa Maria de Guacimo		10	Civ.	Paved	No	3200	68 km
San Alberto		27	Civ.	Unpaved	No	3200	82 km
El Carmen		18	Civ.	Paved	No	3200	83 km
Quepos Managua		32	Civ.	Paved	No	3600	85 km
Tortuquero	TTQ	unknown				0	89 km
Barra Del Colorado		3	Civ.	Paved	No	3200	94 km

Ports

Name	LOCODE	Country	Distance
Caldera	CRCAL	Costa Rica	62 km
Puntarenas	CRPAS	Costa Rica	72 km
Quepos (Puerto Quepos)	CRXQP	Costa Rica	86 km
San Juan Del Norte		Nicaragua	99 km

Dams

Reservoir	Dam Name	River	Year	Distance
	Cachi	Reventazon	1966	62 km
Arenal	Arenal	Arenal	1978	65 km

Nuclear plants

Tsunami impact

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Tsunami affected locations

Initial conditions

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.

Disclaimer
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