IBOV 178,370.29 ▲ 0.21% IPSA 11,020.25 ▼ 0.27% IPC MEX 66,700.17 ▼ 0.35% MERVAL 3,201,973 ▼ 2.21% COLCAP 2,358.64 ▼ 1.09% BVL PERÚ 57,475.88 — — USD/BRL5.13▲ 0.75% USD/MXN17.25▼ 0.50% USD/CLP910.68▼ 1.60% USD/COP3,195▲ 1.95% USD/PEN3.39▼ 0.04% USD/ARS1,496▲ 0.12% USD/UYU40.19▲ 1.51% USD/PYG5,932▲ 1.71% USD/BOB12.03▲ 3.12% USD/DOP57.89▲ 1.30% USD/CRC446.90▲ 1.41% USD/GTQ7.62▲ 2.50% USD/HNL26.78▲ 1.90% USD/NIO36.62▲ 1.01% USD/VES750.21▼ 0.13% USD/PAB1.00— 0.00% USD/BZD2.00— 0.00% USD/JMD157.23▲ 0.61% USD/TTD6.71▲ 1.12% EUR/BRL5.91▲ 1.03% BRENT 79.35 ▼ 5.28% WTI 75.80 ▼ 5.65% IRON ORE 161.91 — — COPPER 6.63 ▲ 1.73% GOLD 4,136 ▲ 2.53% SILVER 59.78 ▲ 3.66% SOY 1,177 ▲ 0.73% CORN 465.25 ▲ 3.56% WHEAT 638.00 ▼ 2.00% COFFEE 307.70 ▼ 3.69% SUGAR 15.06 ▲ 0.33% ORANGE JUICE 157.35 ▼ 0.63% COTTON 81.44 ▲ 0.11% COCOA 6,089 ▲ 2.53% BEEF 227.85 ▼ 1.41% CATTLE 345.95 ▼ 0.54% LITHIUM 71.67 ▲ 3.26% PETR4 42.51 ▼ 1.25% VALE3 76.39 ▲ 2.34% ITUB4 42.15 ▼ 2.36% BBDC4 18.11 ▼ 2.27% ABEV3 15.86 ▲ 0.57% BBAS3 20.98 ▼ 1.36% B3SA3 15.67 ▲ 0.32% WEGE3 49.03 ▲ 1.72% PRIO3 58.27 ▼ 0.39% SUZB3 42.74 ▼ 0.84% RENT3 38.95 ▲ 2.23% AZZA3 16.01 ▼ 1.36% CSAN3 4.03 ▼ 1.71% RAIZ4 0.28 ▲ 7.69% PCAR3 2.72 ▼ 1.09% GMAT3 3.95 ▼ 0.50% PSSA3 54.37 ▲ 0.69% CVCB3 1.39 ▼ 3.47% POSI3 3.46 ▼ 1.42% SLCE3 13.57 ▲ 1.65% NATU3 8.43 ▼ 0.82% BRKM5 5.85 ▼ 1.85% RANI3 8.30 ▼ 1.43% CSNA3 4.76 ▲ 5.54% CMIN3 5.79 ▲ 1.05% USIM5 7.56 — 0.00% GGBR4 25.98 ▲ 1.37% ENEV3 27.10 ▲ 1.31% CPFE3 46.32 ▲ 0.46% CMIG4 11.24 ▼ 0.35% EQTL3 39.09 ▲ 0.51% LREN3 13.59 ▼ 1.88% VIVT3 31.69 ▼ 1.89% RAIL3 14.11 ▼ 0.35% KLABIN 18.21 ▼ 0.16% RAIA DROGASIL 19.46 ▲ 3.24% RDOR3 34.31 ▲ 0.73% HAPV3 11.71 ▼ 1.68% FLRY3 17.43 ▲ 0.93% SMTO3 13.80 ▼ 4.03% UGPA3 32.56 ▼ 1.63% VBBR3 35.43 ▼ 1.94% BBSE3 41.90 ▲ 1.31% BPAC11 56.90 ▼ 0.39% CURY3 31.70 ▲ 0.79% AERI3 2.17 ▲ 0.93% VIVARA 22.42 ▼ 1.84% COMPASS 24.75 ▼ 1.39% VAMOS 3.33 ▲ 2.15% SANB11 28.93 — 0.00% ASAI3 8.62 ▲ 0.82% SBSP3 27.96 ▲ 1.41% WALMEX 49.89 ▲ 0.20% GMEXICO 218.53 ▲ 2.93% FEMSA 217.65 ▲ 0.17% CEMEX 20.10 ▼ 2.43% GFNORTE 197.77 ▼ 0.44% BIMBO 60.86 ▼ 0.70% TELEVISA 9.62 ▼ 1.03% AMX 21.47 ▼ 0.65% GAP 381.34 ▲ 1.40% ASUR 275.54 ▼ 1.10% OMA 239.18 ▲ 3.82% KOF 187.74 ▲ 1.46% GRUMA 263.08 ▼ 0.34% KIMBER 40.32 ▲ 0.47% SQM-B 62,501 ▲ 0.95% COPEC 6,230 ▼ 1.76% BSANTANDER 79.36 ▼ 1.34% FALABELLA 6,290 ▼ 1.47% ENELAM 87.69 ▲ 0.79% CENCOSUD 1,989 ▲ 1.72% CMPC 1,046 ▼ 0.38% BANCO CHILE 190.27 ▼ 1.15% LATAM AIR 25.46 ▲ 0.83% YPF 7,855 ▼ 3.08% GGAL 7,750 ▼ 2.76% PAMPA 5,320 ▼ 3.27% TXAR 643.00 ▼ 1.76% ALUAR 934.50 ▼ 3.31% TGS 9,430 ▼ 4.65% CEPU 2,297 ▼ 3.08% MIRGOR 1,640 — 0.00% COME 41.80 ▼ 3.22% LOMA NEGRA 3,483 ▼ 2.93% BYMA 291.50 ▼ 0.34% TELECOM ARG 4,300 ▼ 1.94% ECOPETROL 16.20 ▼ 2.42% BANCOLOMBIA 89.60 ▼ 1.66% GRUPO AVAL 5.24 — 0.00% CREDICORP 391.99 ▼ 0.96% SOUTHERN COPPER 194.97 ▲ 4.87% BUENAVENTURA 32.21 ▲ 5.71% MERCADOLIBRE 1,888 ▼ 0.56% NUBANK 14.30 ▼ 1.00% XP 16.91 ▼ 0.70% PAGSEGURO 9.49 ▼ 1.20% STONE 11.25 ▼ 0.88% GLOBANT 38.01 ▲ 2.33% TECNOGLASS 46.12 ▼ 1.37% GAP AIRPORT 220.98 ▲ 1.30% ASUR 275.54 ▼ 1.10% OMA AIRPORT 111.02 ▲ 4.02% AMX ADR 24.82 ▼ 0.56% FEMSA ADR 125.86 ▲ 0.09% CEMEX ADR 11.60 ▼ 2.03% PETROBRAS ADR 18.69 ▼ 1.94% VALE ADR 14.85 ▲ 1.82% ITAU ADR 8.21 ▼ 3.36% SANTANDER BR 5.69 ▼ 0.96% AMBEV ADR 3.04 ▼ 0.49% CSN 0.94 ▲ 0.65% GERDAU 5.10 ▲ 0.69% LATAM ADR 55.82 ▲ 2.40% BTC 64,139 ▲ 1.07% ETH 1,873 ▲ 0.77% SOL 74.11 ▲ 0.87% XRP 1.08 ▲ 0.42% BNB 593.59 ▲ 0.81% ADA 0.19 ▼ 0.42% DOGE 0.07 ▲ 0.26% AVAX 6.73 ▲ 2.50% LINK 8.19 ▲ 0.21% DOT 0.84 ▲ 2.41% LTC 44.65 ▲ 0.91% BCH 213.74 ▲ 0.29% TRX 0.33 ▲ 0.03% XLM 0.17 ▼ 0.43% HBAR 0.07 ▼ 0.58% NEAR 1.74 ▲ 0.44% ATOM 1.37 ▲ 0.32% AAVE 90.43 ▼ 2.01% SELIC 14.25% EMBRAER 90.46 ▲ 0.96% EMBRAER ADR 70.43 ▼ 0.72% JBS 13.59 ▼ 1.27% JBS BDR 69.65 ▲ 0.12% MBRF3 16.99 ▼ 4.01% MBRFY 3.27 ▼ 2.97% INTER 5.72 ▲ 1.51% IBOV 178,370.29 ▲ 0.21% IPSA 11,020.25 ▼ 0.27% IPC MEX 66,700.17 ▼ 0.35% MERVAL 3,201,973 ▼ 2.21% COLCAP 2,358.64 ▼ 1.09% BVL PERÚ 57,475.88 — — USD/BRL 5.13 ▲ 0.75% USD/MXN 17.25 ▼ 0.50% USD/CLP 910.41 ▼ 1.63% USD/COP 3,195 ▲ 1.95% USD/PEN 3.39 ▼ 0.04% USD/ARS 1,496 ▲ 0.12% USD/UYU 40.19 ▲ 1.51% USD/PYG 5,932 ▲ 1.71% USD/BOB 12.03 ▲ 3.12% USD/DOP 57.89 ▲ 1.30% USD/CRC 446.90 ▲ 1.41% USD/GTQ 7.62 ▲ 2.50% USD/HNL 26.78 ▲ 1.90% USD/NIO 36.62 ▲ 1.01% USD/VES 750.21 ▼ 0.13% USD/PAB 1.00 — 0.00% USD/BZD 2.00 — 0.00% USD/JMD 157.23 ▲ 0.61% USD/TTD 6.71 ▲ 1.12% EUR/BRL 5.91 ▲ 1.03% BRENT 79.35 ▼ 5.28% WTI 75.80 ▼ 5.65% IRON ORE 161.91 — — COPPER 6.63 ▲ 1.73% GOLD 4,136 ▲ 2.53% SILVER 59.78 ▲ 3.66% SOY 1,177 ▲ 0.73% CORN 465.25 ▲ 3.56% WHEAT 638.00 ▼ 2.00% COFFEE 307.70 ▼ 3.69% SUGAR 15.06 ▲ 0.33% ORANGE JUICE 157.35 ▼ 0.63% COTTON 81.44 ▲ 0.11% COCOA 6,089 ▲ 2.53% BEEF 227.85 ▼ 1.41% CATTLE 345.95 ▼ 0.54% LITHIUM 71.67 ▲ 3.26% PETR4 42.51 ▼ 1.25% VALE3 76.39 ▲ 2.34% ITUB4 42.15 ▼ 2.36% BBDC4 18.11 ▼ 2.27% ABEV3 15.86 ▲ 0.57% BBAS3 20.98 ▼ 1.36% B3SA3 15.67 ▲ 0.32% WEGE3 49.03 ▲ 1.72% PRIO3 58.27 ▼ 0.39% SUZB3 42.74 ▼ 0.84% RENT3 38.95 ▲ 2.23% AZZA3 16.01 ▼ 1.36% CSAN3 4.03 ▼ 1.71% RAIZ4 0.28 ▲ 7.69% PCAR3 2.72 ▼ 1.09% GMAT3 3.95 ▼ 0.50% PSSA3 54.37 ▲ 0.69% CVCB3 1.39 ▼ 3.47% POSI3 3.46 ▼ 1.42% SLCE3 13.57 ▲ 1.65% NATU3 8.43 ▼ 0.82% BRKM5 5.85 ▼ 1.85% RANI3 8.30 ▼ 1.43% CSNA3 4.76 ▲ 5.54% CMIN3 5.79 ▲ 1.05% USIM5 7.56 — 0.00% GGBR4 25.98 ▲ 1.37% ENEV3 27.10 ▲ 1.31% CPFE3 46.32 ▲ 0.46% CMIG4 11.24 ▼ 0.35% EQTL3 39.09 ▲ 0.51% LREN3 13.59 ▼ 1.88% VIVT3 31.69 ▼ 1.89% RAIL3 14.11 ▼ 0.35% KLABIN 18.21 ▼ 0.16% RAIA DROGASIL 19.46 ▲ 3.24% RDOR3 34.31 ▲ 0.73% HAPV3 11.71 ▼ 1.68% FLRY3 17.43 ▲ 0.93% SMTO3 13.80 ▼ 4.03% UGPA3 32.56 ▼ 1.63% VBBR3 35.43 ▼ 1.94% BBSE3 41.90 ▲ 1.31% BPAC11 56.90 ▼ 0.39% CURY3 31.70 ▲ 0.79% AERI3 2.17 ▲ 0.93% VIVARA 22.42 ▼ 1.84% COMPASS 24.75 ▼ 1.39% VAMOS 3.33 ▲ 2.15% SANB11 28.93 — 0.00% ASAI3 8.62 ▲ 0.82% SBSP3 27.96 ▲ 1.41% WALMEX 49.89 ▲ 0.20% GMEXICO 218.53 ▲ 2.93% FEMSA 217.65 ▲ 0.17% CEMEX 20.10 ▼ 2.43% GFNORTE 197.77 ▼ 0.44% BIMBO 60.86 ▼ 0.70% TELEVISA 9.62 ▼ 1.03% AMX 21.47 ▼ 0.65% GAP 381.34 ▲ 1.40% ASUR 275.54 ▼ 1.10% OMA 239.18 ▲ 3.82% KOF 187.74 ▲ 1.46% GRUMA 263.08 ▼ 0.34% KIMBER 40.32 ▲ 0.47% SQM-B 62,501 ▲ 0.95% COPEC 6,230 ▼ 1.76% BSANTANDER 79.36 ▼ 1.34% FALABELLA 6,290 ▼ 1.47% ENELAM 87.69 ▲ 0.79% CENCOSUD 1,989 ▲ 1.72% CMPC 1,046 ▼ 0.38% BANCO CHILE 190.27 ▼ 1.15% LATAM AIR 25.46 ▲ 0.83% YPF 7,855 ▼ 3.08% GGAL 7,750 ▼ 2.76% PAMPA 5,320 ▼ 3.27% TXAR 643.00 ▼ 1.76% ALUAR 934.50 ▼ 3.31% TGS 9,430 ▼ 4.65% CEPU 2,297 ▼ 3.08% MIRGOR 1,640 — 0.00% COME 41.80 ▼ 3.22% LOMA NEGRA 3,483 ▼ 2.93% BYMA 291.50 ▼ 0.34% TELECOM ARG 4,300 ▼ 1.94% ECOPETROL 16.20 ▼ 2.42% BANCOLOMBIA 89.60 ▼ 1.66% GRUPO AVAL 5.24 — 0.00% CREDICORP 391.99 ▼ 0.96% SOUTHERN COPPER 194.97 ▲ 4.87% BUENAVENTURA 32.21 ▲ 5.71% MERCADOLIBRE 1,888 ▼ 0.56% NUBANK 14.30 ▼ 1.00% XP 16.91 ▼ 0.70% PAGSEGURO 9.49 ▼ 1.20% STONE 11.25 ▼ 0.88% GLOBANT 38.01 ▲ 2.33% TECNOGLASS 46.12 ▼ 1.37% GAP AIRPORT 220.98 ▲ 1.30% ASUR 275.54 ▼ 1.10% OMA AIRPORT 111.02 ▲ 4.02% AMX ADR 24.82 ▼ 0.56% FEMSA ADR 125.86 ▲ 0.09% CEMEX ADR 11.60 ▼ 2.03% PETROBRAS ADR 18.69 ▼ 1.94% VALE ADR 14.85 ▲ 1.82% ITAU ADR 8.21 ▼ 3.36% SANTANDER BR 5.69 ▼ 0.96% AMBEV ADR 3.04 ▼ 0.49% CSN 0.94 ▲ 0.65% GERDAU 5.10 ▲ 0.69% LATAM ADR 55.82 ▲ 2.40% BTC 64,139 ▲ 1.07% ETH 1,873 ▲ 0.77% SOL 74.11 ▲ 0.87% XRP 1.08 ▲ 0.42% BNB 593.59 ▲ 0.81% ADA 0.19 ▼ 0.42% DOGE 0.07 ▲ 0.26% AVAX 6.73 ▲ 2.50% LINK 8.19 ▲ 0.21% DOT 0.84 ▲ 2.41% LTC 44.65 ▲ 0.91% BCH 213.74 ▲ 0.29% TRX 0.33 ▲ 0.03% XLM 0.17 ▼ 0.43% HBAR 0.07 ▼ 0.58% NEAR 1.74 ▲ 0.44% ATOM 1.37 ▲ 0.32% AAVE 90.43 ▼ 2.01% SELIC 14.25% EMBRAER 90.46 ▲ 0.96% EMBRAER ADR 70.43 ▼ 0.72% JBS 13.59 ▼ 1.27% JBS BDR 69.65 ▲ 0.12% MBRF3 16.99 ▼ 4.01% MBRFY 3.27 ▼ 2.97% INTER 5.72 ▲ 1.51%
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Tuesday, August 4, 2026

Huge Underground River Found in Brazil: Daily

By · August 29, 2011 · 1 min read

Daily Brief

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By Sarah de Sainte Croix, Senior Contributing Reporter

RIO DE JANEIRO, BRAZIL – In the North of Brazil, scientists have discovered evidence of a huge, 6,000 kilometer long, subterranean river running four kilometers (almost 2.5 miles) below the surface and following the course of the Amazon River. The discovery was made by a team of scientists from Brazil’s National Geophysics Observatory, lead by Dr. Valiya Hamza.

The Amazon River from above, photo by Jon Rawlinson/Flickr Creative Commons License.
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The underground river, like its surface-level counterpart, flows East to West, originating in the Andes and emptying out into the Atlantic Ocean at Amapá.

However, it is significantly wider, ranging from 200 to 400 kilometers wide, compared to the Amazon’s one to 100 kilometer width range, and flows much more slowly, at just one millimeter per second compared to five meters per second.

The team made the discovery whilst studying temperature variations in 241 inactive wells which were drilled in the 1970s and ‘80s by Brazil’s state-owned oil company, Petrobras, searching for hydrocarbons in the Amazon region.

The new river has been named the Rio Hamza in honor of Dr. Hamza, who has been studying the region for almost four decades.

Read more here (in Portuguese).

* The Rio Times Daily Update is a new feature we are offering to help keep you up-to-date with the major news as it happens.

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