Seismic hazard in Chocó

Aa, Av, Ae and Ad for its 31 municipalities under the NSR-10.

Photo: Josué Isaí Ramos Figueroa / Unsplash

According to Appendix A-4 of the NSR-10, of the 31 municipalities of Chocó, all are in the high seismic hazard zone. The capital, Quibdó, has Aa = 0.35 and Av = 0.35, high hazard. Across the department, Aa ranges from 0.25 to 0.45 and Av from 0.25 to 0.40.

Municipalities: 31
Capital: Quibdó
Aa / Av of the capital: 0.35 / 0.35
High hazard: 31
Intermediate hazard: 0
Low hazard: 0

Municipalities of Chocó

Values from Appendix A-4 of the NSR-10. Tap a municipality to open its design spectrum.

Source: NSR-10, Title A, Appendix A-4. Zone according to A.2.3.
Municipality	Code	Aa	Av	Zone	Ae	Ad
Quibdó	27001	0.35	0.35	High	0.25	0.13
Acandí	27006	0.25	0.25	High	0.09	0.04
Alto Baudó	27025	0.40	0.40	High	0.24	0.10
Atrato	27050	0.35	0.35	High	0.24	0.10
Bagadó	27073	0.35	0.30	High	0.24	0.10
Bahía Solano	27075	0.45	0.40	High	0.24	0.10
Bajo Baudó	27077	0.45	0.40	High	0.24	0.10
Belén de Bajirá	27086	0.25	0.30	High	0.24	0.10
Bojayá	27099	0.40	0.40	High	0.24	0.10
Cantón de San Pablo	27135	0.40	0.40	High	0.24	0.10
Carmen del Darién	27150	0.35	0.35	High	0.24	0.10
Certeguí	27160	0.35	0.35	High	0.24	0.10
Condoto	27205	0.35	0.35	High	0.24	0.10
El Carmen de Atrato	27245	0.30	0.30	High	0.24	0.10
El Litoral del San Juan	27250	0.40	0.40	High	0.20	0.10
Itsmína	27361	0.40	0.40	High	0.23	0.10
Juradó	27372	0.40	0.40	High	0.24	0.10
Lloró	27413	0.40	0.35	High	0.24	0.10
Medio Atrato	27425	0.35	0.35	High	0.24	0.10
Medio Baudó	27430	0.45	0.40	High	0.24	0.10
Medio San Juan	27450	0.40	0.40	High	0.24	0.10
Nóvita	27491	0.40	0.35	High	0.24	0.10
Nuquí	27495	0.45	0.40	High	0.24	0.10
Río Iro	27580	0.35	0.35	High	0.24	0.10
Río Quito	27600	0.35	0.40	High	0.24	0.10
Riosucio	27615	0.35	0.35	High	0.24	0.10
San José del Palmar	27660	0.35	0.30	High	0.24	0.10
Sipí	27745	0.35	0.35	High	0.24	0.10
Tadó	27787	0.35	0.35	High	0.24	0.10
Unguía	27800	0.25	0.25	High	0.15	0.07
Unión Panamericana	27810	0.40	0.40	High	0.24	0.10

What does it mean for design in Chocó?

Municipalities in the high hazard zone. In reinforced concrete, the NSR-10 only accepts systems with special energy dissipation capacity (DES) in the high hazard zone, the most demanding detailing in the code: confinement of columns and joints, and strict drift control.

The municipality's value is only the starting point: the soil profile sets the coefficients Fa and Fv, and the occupancy group sets the importance factor. Work out the full spectrum with the NSR-10 design spectrum, or look up another municipality in the seismic hazard tool.

Frequently asked questions

What seismic hazard zone is Quibdó in?

In the high seismic hazard zone: Aa = 0.35 and Av = 0.35, according to Appendix A-4 of the NSR-10.

Which municipalities of Chocó have the highest seismic hazard?

The department's highest coefficient, 0.45, is found in Bahía Solano, Bajo Baudó, Medio Baudó and Nuquí.

How many municipalities of Chocó are in each seismic hazard zone?

Of 31 municipalities, 31 are in the high hazard zone, 0 in the intermediate zone and 0 in the low zone (NSR-10, Appendix A-4).

Last updated: October 6, 2026

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Seismic hazard in Chocó

Municipalities of Chocó

What does it mean for design in Chocó?

Frequently asked questions

Other departments

Do you have a project in Chocó?