# Brazil deployed seafloor seismometers at Rio Grande Rise

> An expedition placed two instruments on 16–23 August; this is not a rare-earth reserve or mine discovery.

- Canonical URL: https://newsverum.com/en/news/rio-grande-rise-seismometers-study-crust-august-2026
- Publisher: Newsverum
- Section: Environment
- Country: Brazil
- Published: 2026-10-10T21:53:06+00:00
- Updated: 2026-10-10T21:53:06+00:00
- Event / data period: 2026-08-16
- Other editions: [Türkçe](https://newsverum.com/tr/news/rio-grande-rise-seismometers-study-crust-august-2026.md), [العربية](https://newsverum.com/ar/news/rio-grande-rise-seismometers-study-crust-august-2026.md), [Français](https://newsverum.com/fr/news/rio-grande-rise-seismometers-study-crust-august-2026.md), [Español](https://newsverum.com/es/news/rio-grande-rise-seismometers-study-crust-august-2026.md), [Deutsch](https://newsverum.com/de/news/rio-grande-rise-seismometers-study-crust-august-2026.md), [Português](https://newsverum.com/pt/news/rio-grande-rise-seismometers-study-crust-august-2026.md)

Brazil’s National Observatory and Navy installed two ocean-bottom seismometers at Rio Grande Rise during an expedition from 16 to 23 August 2026. The Observatory’s 29 September release and CPG’s 10 October report place the instruments about 1,500 kilometres off the coast and roughly 500–600 metres deep; deployment was planned for one year.

The instruments collect seismic signals to study crustal structure and geological formation indirectly. Regional discussion of rare-earth potential does not establish a deposit, reserve or extraction project at the site. This report concerns a scientific instrument deployment.

## Data

### Rio Grande Rise research deployment

Methodology: The Observatory’s primary release appeared on 29 September; CPG’s 10 October item recaps the August expedition. Two instruments were deployed at roughly 500–600 m depth, about 1,500 km offshore, for a planned year of monitoring. This is not a mineral discovery. Geography: Rio Grande Rise, South Atlantic.

| Text in Turkish | Text in English | Text in Arabic | Text in French | Text in Spanish | Text in German | Text in Portuguese |
|---|---|---|---|---|---|---|
| İki okyanus tabanı sismometresi 16–23 Ağustos’ta yaklaşık 500–600 m derinliğe yerleştirildi; cihazlar yaklaşık bir yıllık izleme için planlandı. Bu bir mineral rezervi tespiti değildir. | Two ocean-bottom seismometers were installed at roughly 500–600 m depth during 16–23 August; a year-long deployment was planned. This is not a mineral-reserve finding. | رُكّب جهازا قياس زلازل في قاع البحر على عمق يقارب 500–600 متر بين 16 و23 أغسطس؛ وخُطط لنشرهما عاماً. وليس ذلك إثباتاً لاحتياطي معدني. | Deux sismomètres de fond ont été installés par 500–600 m entre le 16 et le 23 août ; leur déploiement était prévu pour un an. Il ne s’agit pas d’une découverte de réserves minérales. | Se instalaron dos sismómetros submarinos a unos 500–600 m entre el 16 y el 23 de agosto, con un despliegue previsto de un año. No se trata de un hallazgo de reservas minerales. | Vom 16. bis 23. August wurden zwei Meeresbodenseismometer in etwa 500–600 m Tiefe installiert; der Einsatz war für ein Jahr geplant. Dies ist kein Nachweis von Mineralreserven. | Foram instalados dois sismómetros submarinos a cerca de 500–600 m entre 16 e 23 de agosto, com operação prevista por um ano. Não se trata da descoberta de reservas minerais. |

Sources: <https://clickpetroleoegas.com.br/marinha-e-observatorio-nacional-instalam-dois-sismografos-no-fundo-do-atlantico-a-1-500-km-do-brasil-para-estudar-area-com-potencial-de-terras-raras-ctl01/>, <https://www.gov.br/observatorio/pt-br/assuntos/noticias/observatorio-nacional-e-marinha-do-brasil-realizam-instalacao-inedita-de-sismografos-na-elevacao-do-rio-grande/> · Download data: [JSON](https://newsverum.com/api/v1/articles/rio-grande-rise-seismometers-study-crust-august-2026/data/rio-grande-rise-seismometers-study-crust-august-2026-scope?lang=en&format=json) · [CSV](https://newsverum.com/api/v1/articles/rio-grande-rise-seismometers-study-crust-august-2026/data/rio-grande-rise-seismometers-study-crust-august-2026-scope?lang=en&format=csv)

## Sources

- [Click Petróleo e Gás (CPG)](<https://clickpetroleoegas.com.br/marinha-e-observatorio-nacional-instalam-dois-sismografos-no-fundo-do-atlantico-a-1-500-km-do-brasil-para-estudar-area-com-potencial-de-terras-raras-ctl01/>) (Source checked: 2026-10-10; Published: 2026-10-10)
- [Observatório Nacional / Ministry of Science, Technology and Innovation](<https://www.gov.br/observatorio/pt-br/assuntos/noticias/observatorio-nacional-e-marinha-do-brasil-realizam-instalacao-inedita-de-sismografos-na-elevacao-do-rio-grande/>) (Source checked: 2026-10-10; Published: 2026-09-29)

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