PAN AMERICAN SILVERS PROVEN AND PROBABLE RESERVES INCREASE TO 234 MILLION OUNCES
Measured and Indicated Silver Resources Climb to 711 Million Ounces (All amounts in US dollars unless otherwise stated and all production figures are approximate) Vancouver, British Columbia - February 11, 2010 - Pan American Silver Corp.

(PAAS: NASDAQ; PAA: TSX) ("Pan American" or the "Company") is pleased to announce the results of its 2009 year end silver reserves and resources update.

In 2009, the Companys successful exploration programs added 36.8 million contained ounces of proven and probable silver reserves at its operating mines.

The new reserves were more than sufficient to replace the 26.6 million contained silver ounces mined during the year.

The net result: Pan American increased its proven and probable silver reserves by approximately 5% to 234 million ounces as at December 31, 2009.

The largest reserve increase was at the La Colorada mine, where the Company added over 16 million ounces of silver from the discovery of an extension of the NC2 vein, the mines main source of sulphide ore.

At December 31, 2009, La Coloradas reserves had grown by 67% to 30.4 million ounces (net of 2009 production) from 18.2 million ounces at the end of 2008.

The NC2 vein, which remains open at depth and to the east, and the newly discovered NC3 vein and high-grade mantos, will continue to be the focus of extensive drilling planned for 2010. The Company also managed to more than replace the silver mined during the year at its Peruvian operations.

Silver reserves at the Morococha mine, increased by 8% to 38 million ounces at year-end.

Exploration activities at Huaron yielded an increase of 4% or 6.7 million ounces of silver net of the 4.5 million ounces mined during the year.

Huaron continues to have the largest proven and probable silver reserve in the Companys portfolio.

Last years fourth quarter acquisition of Aquiline Resources Inc.

with its Navidad project in Argentina, had an enormous positive impact on the Companys resources.

The Companys aggregate measured and indicated silver resources soared to 711 million ounces, from the 82 million ounces the Company carried at the end of 2008, while inferred silver resources more than doubled to 229 million ounces.

These resource numbers do not include the La Preciosa joint venture project.

Commenting on the results, Michael Steinmann, Executive VP Geology and Exploration said, "2009 was an exceptional year.

Between new exploration discoveries and the acquisition of Aquiline, our measured and indicated silver resources, plus proven and probable silver reserves, increased to almost one billion ounces.

Adding value through brownfield exploration is one of our core strengths and we proved that again in 2009 with a solid reserve increase.

Brownfield exploration activities during 2010 will focus on reserve replacement at our operations, where we expect to invest approximately $8.2 million for 89,000 meters of diamond drilling.

However, our main focus will be on resource conversion and new discoveries at the Navidad and La Preciosa projects.

Consequently, we have stepped up our greenfield exploration budget to a record of $15.4 million including over 94,000 meters of drilling planned for 2010." The following table illustrates the changes in Pan Americans estimated silver reserves, year over year: Proven and probable silver reserves, as of December 31, 2008 223.7 million ounces Less mined ounces (contained) during 2009 (26.6) million ounces Additions due to exploration drilling during 2009 36.8 million ounces ----------------------------------------------------------------------- ------- Proven and probable silver reserves, as of December 31, 2009 233.9 million ounces
Complete reserves and resource information for all metals, including tonnage and ore grades is available at www.panamericansilver.com .


Complete silver and gold reserves and resource information at December 31, 2009 is as follows:
MINERAL RESERVES - PROVEN AND PROBABLE
Location Type Classification Tonnes (000s) Ag (g/mt) Ag Cont. (000s oz) Au (g/mt) Au Cont (oz) Huaron Peru Vein Proven 6,471 185 38,385 N/A N/A
Vein Probable 4,371 184 25,845 N/A N/A Morococha (92.2%) Peru Vein/Mantos Proven 4,079 166 21,709 N/A N/A
Vein /Mantos Probable 2,707 187 16,267 N/A N/A La Colorada Mexico Vein Proven 1,106 400 14,236 0.55 19,496
Vein Probable 1,176 429 16,199 0.47 17,935 Quiruvilca Peru Vein Proven 407 168 2,201 0.77 10,103
Vein Probable 363 148 1,725 0.56 6,503 Silver Stockpiles Peru Flux Material Proven 189 318 1,935 N/A N/A Alamo Dorado Mexico Disseminated Proven 6,468 100 20,779 0.34 70,491
Disseminated Probable 3,678 86 10,116 0.31 36,656 Manantial Espejo Argentina Vein Proven 4,308 163 22,631 2.33 322,749
Vein Probable 3,033 138 13,501 2.00 195,032 San Vicente (95%) Bolivia Vein Proven 1,548 423 21,059 N/A N/A
Vein Probable 706 323 7,329 N/A N/A TOTALS
Proven + Probable 40,609 179 233,916 -- 678,966
MINERAL RESOURCES - MEASURED AND INDICATED
Location Type Classification Tonnes (000s) Ag (g/mt) Ag Cont. (000s oz) Au (g/mt) Au Cont (oz) Huaron Peru Vein Measured 819 159 4,179 N/A N/A
Vein Indicated 521 157 2,638 N/A N/A Morococha (92.2%) Peru Vein/Mantos Measured 1,091 145 5,098 N/A N/A
Vein /Mantos Indicated 1,409 213 9,667 N/A N/A La Colorada Mexico Vein Measured 129 232 960 0.26 1,088
Vein Indicated 1,259 215 8,700 0.19 7,839 Quiruvilca Peru Vein Measured 2,386 135 10,392 0.76 58,163
Vein Indicated 986 124 3,923 0.80 25,381 Alamo Dorado Mexico Disseminated Measured 1,468 73 3,466 0.36 17,138
Disseminated Indicated 2,229 59 4,203 0.52 37,550 Manantial Espejo Argentina Vein Measured 815 100 2,618 1.02 26,723
Vein Indicated 2,154 103 7,099 0.98 67,866 San Vicente (95%) Bolivia Vein Measured 1,048 156 5,256 N/A N/A
Vein Indicated 569 187 3,422 N/A N/A Navidad Argentina Mantos, Diss. Measured 15,400 137 67,832 N/A N/A
Mantos, Diss.

Indicated 139,800 126 564,531 N/A N/A Pico Machay Peru Disseminated Measured 4,700 N/A N/A 0.91 137,509
Disseminated Indicated 5,900 N/A N/A 0.67 127,092 Calcatreu Argentina Vein Indicated 7,995 26 6,606 2.63 676,028 TOTALS
Measured + Indicated 190,678 116 710,590 -- 1,182,377
MINERAL RESOURCES - INFERRED
Location Type Classification Tonnes (000s) Ag (g/mt) Ag Cont. (000s oz) Au (g/mt) Au Cont (oz) Huaron Peru Vein Inferred 5,416 177 30,754 N/A N/A Morococha (92.2%) Peru Vein/Mantos Inferred 6,260 177 35,621 N/A N/A La Colorada Mexico Vein Inferred 2,750 308 27,245 0.35 31,113 Quiruvilca Peru Vein Inferred 923 113 3,368 0.44 12,951 Alamo Dorado Mexico Disseminated Inferred 1,146 44 1,622 0.59 21,885 Manantial Espejo Argentina Vein Inferred 1,410 103 4,685 1.09 49,419 San Vicente (95%) Bolivia Vein Inferred 513 302 4,977 N/A N/A Navidad Argentina Mantos, Diss. Inferred 45,900 81 119,386 N/A N/A Pico Machay Peru Disseminated Inferred 23,900 N/A NA 0.58 445,673 Calcatreu Argentina Vein Inferred 3,413 17 1,822 2.06 226,045 TOTALS
Inferred 91,631 78 229,479 -- 787,086
HISTORICAL ESTIMATES
Location Unclassified Tonnes (000s) Ag (g/mt) Ag Cont. (000s oz) Au (g/mt) Pb (%) Au Cont (oz) Hog Heaven (iii) USA Historical (iii) (iv) 2,705 167 14,550 0.62 N/A N/A Hog Heaven (iii) USA Historical (ii) (v) 7,639 133 32,730 0.70 N/A N/A Waterloo (iv) USA Historical 33,758 93 100,937 N/A N/A N/A TOTAL
Historical 44,102 104 148,217
Notes: Mineral resources are in addition to reserves.

Mineral reserves and resources are as defined by the CIM Definiton Standards on Mineral Resources and Mineral Reserves.

Mineral resources do not have demonstrated economic viability. This table illustrates Pan American Silver Corps share of mineral reserves and resources.

Properties in which Pan American has less than 100% interest are noted next to the property name.

Environmental, permitting, legal, title, taxation, socio-economic, political, marketing or other issues are not expected to materially affect the above estimates of mineral reserves.
Prices used to calculate December 31, 2009 ore reserves for all mines were Ag: $13.00/oz, Au: $875/oz, Pb: $1,600/tonne, Cu: $5,000/tonne, Zn: $1,600/tonne.

Prices used for Navidad were Ag: $12.52/oz and Pb: $1,100/tonne. Prices used for Calcatreu were Ag: $12.50/oz and Au: $650/oz.
(ii) The historical estimate for Hog Heaven was calculated by Gregory Hahn, Chief Geological Engineer for CoCa Mines Inc., a previous owner of the property, in a report titled "Hog Heaven Project Optimization Study" dated May 1989, prior to implementation of NI 43-101.

The historical estimate was based on extensive diamond drilling, and was calculated using a silver price of $6.50 per ounce and a gold price of $400 per ounce (these were relevant prices at the time of the calculation). Michael Steinmann, P.Geo., Qualified Person ("QP") for the Company, has reviewed the available data, including drill sections, surface maps, and additional supporting information sources, and believes that the historic calculation was conducted in a professional and competent manner and is relevant for the purposes of the Companys decision to maintain its interest in this property.

In the study, the historic estimate was sub-categorized as follows:
Category Tons oz/ton Ag oz/ton Au Proven reserves 2,981,690 4.88 0.018 Probable & possible reserves 904,200 10.40 0.020 Heap leach ore 316,100 1.56 0.014 Possible resources 4,500,000 2.41 0.020 Inferred resources 2,700,000 4.44 0.022
However, the Company has not completed the work necessary to verify the historical estimate.

Accordingly, the Company is not treating the historical estimate as NI 43-101 compliant categories of mineral resources based on information prepared by or under the supervision of a QP.

These historical estimates should not be relied upon.
(iii) The Company believes that the historical estimate category of "proven reserves" for Hog Heaven most closely corresponds to 2,705,000 tonnes in the NI 43-101 category of "indicated resources".
(iv) The Company believes that the historical estimate categories of "proven & possible reserves", "heap leach ore stockpile", "possible resources" and "inferred resources" most closely correspond to 7,639,000 tonnes in the NI 43-101 category of "inferred resources."
(v) The historical estimate for Waterloo was initially calculated by Asarco Inc.

in 1968.

In September 1994 Robert J.

Rodger, P.Eng., reviewed the Asarco reports and prepared a Technical Evaluation Report on the Waterloo property, prior to the implementation of NI 43-101.

The Technical Evaluation Report confirmed that the historical estimate was based on reverse circulation drilling and underground sampling, and concluded the estimate was based on sound methodology.

The historical estimate at Waterloo was calculated using a silver price of $5.00 per ounce (the relevant price at the time of the calculation).

Michael Steinmann, P.Geo., QP for the Company, has reviewed the Technical Evaluation Report and believes the historic calculation was conducted in a professional and competent manner and is relevant for purposes of the Companys decision to maintain its interest in the property.

The Company believes that the historical estimate category of 37,235,000 tons (at 2.71 ounces per ton silver) of "measured and indicated reserves" most closely correspond to 33,758,000 tonnes in the NI 43-101 category of "indicated resource." However, the Company has not completed the work necessary to verify the historical estimate.

Accordingly, the Company is not treating the historical estimate as NI 43-101 compliant categories of mineral resources based on information prepared by or under the supervision of a QP.

These historical estimates should not be relied upon.
Mineral resource and reserve estimates for Huaron, Quiruvilca, San Vicente, La Colorada, Manantial Espejo, Alamo Dorado and Morococha were prepared under the supervision of Michael Steinmann, P.

Geo., Executive Vice-President Geology & Exploration and Martin G.

Wafforn, P.

Eng., Vice-President Technical Services as Qualified Persons as that term is defined in NI 43-101.

Navidad resource estimates were prepared by Snowden under the supervision of Pamela De Mark, P.

Geo., Sr.

Consultant Snowden Mining Industry Consultants, John J.

Chulick, P.

Geo., Dean K. Williams, Licensed Professional Geologist, Damian Spring, Mining Engineer, and John.

A.

Wells, Independent Metallurgical Consultant. Mineral resource estimates for Hog Heaven and Waterloo are based on historical third party estimates.

About Pan American Silver Pan American Silvers mission is to be the worlds largest and lowest cost primary silver mining company by increasing its low-cost silver production and silver reserves.

The Company has eight mining operations in Mexico, Peru, Argentina and Bolivia.

Pan American also owns the Navidad project in Chubut, Argentina and is the operator of the La Preciosa project in Durango, Mexico. Michael Steinmann, P.

Geo., Executive VP Geology & Exploration, and Martin Wafforn, P.

Eng., VP Technical Services, each of whom are Qualified Persons, as the term is defined in National Instrument 43-101 "NI 43-101", have reviewed and approved the contents of this press release. Information Contact Kettina Cordero Coordinator, Investor Relations (604) 684-1175
www.panamericansilver.com
This NEWS RELEASE contains "forward-looking STATEMENTS" within the meaning of the UNITED STATES Private Securities Litigation reform act of 1995 and "fORWARD-LOOKING INFORMATION" WITHIN THE MEANING OF applicable Canadian securities legislation.

Statements containing forward-looking information express, as at the date of this NEWS RELEASE, the Companys plans, estimates, forecasts, projections, expectations, or beliefs as to future events or results and the Company does not intend, and does not assume any obligation to, update such statements containing the forward-looking information.

SUCH forward-looking statements AND information include, but are not limited to statements as to: the accuracy of estimated mineral reserves and resources, anticipated Results of future exploration, and FORECAST future Precious metal prices.

AND EXPECTATIONS THAT Environmental, permitting, legal, title, taxation, socio-economic, political, marketing or other issues WILL NOT materially affect estimates of mineral reserves.

These statements reflect the Companys current views with respect to future events and are necessarily based upon a number of assumptions and estimates that, while considered reasonable by the Company, are inherently subject to significant business, economic, competitive, political and social uncertainties and contingencies.


These statements reflect the Companys current views with respect to future events and are necessarily based upon a number of assumptions and estimates that, while considered reasonable by the Company, are inherently subject to significant business, economic, competitive, political and social uncertainties and contingencies.

Many factors, both known and unknown, could cause actual results, performance or achievements to be materially different from the results, performance or achievements that are or may be expressed or implied by such forward-looking statements contained in this News Release and the Company has made assumptions and estimates based on or related to many of these factors.

Such factors include, without limitation: fluctuations in spot and forward markets for silver, gold, base metals and certain other commodities (such as natural gas, fuel oil and electricity); fluctuations in currency markets (such as the Peruvian sol, Mexican peso, Argentine peso and Bolivian boliviano versus the U.S. dollar); risks related to the technological and operational nature of the Companys business; changes in national and local government, legislation, taxation, controls or regulations and political or economic developments in Canada, the United States, Mexico, Peru, Argentina, Bolivia or other countries where the Company may carry on business in the future; risks and hazards associated with the business of mineral exploration, development and mining (including environmental hazards, industrial accidents, unusual or unexpected geological or structural formations, pressures, cave-ins and flooding); RISKS RELATING TO THE CREDIT WORTHINESS OR FINANCIAL CONDITION OF SUPPLIERS, REFINERS AND OTHER PARTIES WITH WHOM THE COMPANY DOES BUSINESS; inadequate insurance, or inability to obtain insurance, to cover these risks and hazards; employee relations; RELATIONSHIPS WITH AND CLAIMS BY LOCAL COMMUNITIES AND INDIGENOUS POPULATIONS; availability and increasing costs associated with mining inputs and labour; the speculative nature of mineral exploration and development, including the risks of obtaining necessary licenses and permits AND THE PRESENCE OF LAWS AND REGULATIONS THAT MAY IMPOSE RESTRICTIONS ON MINING, INCLUDING THOSE CURRENTLY IN THE PROVINCE OF CHUBUT, ARGENTINA; diminishing quantities or grades of mineral reserves as properties are mined; global financial conditions; business opportunities that may be presented to, or pursued by, the Company; the Companys ability to complete and successfully integrate acquisitions AND TO MITIGATE OTHER BUSINESS COMBINATION RISKS; challenges to, OR DIFFICULTY IN MAINTAINING, the Companys title to properties AND CONTINUED OWNERSHIP THEREOF; the actual results of current exploration activities, conclusions of economic evaluations, and changes in project parameters to deal with unanticipated economic or other factors; increased competition in the mining industry for properties, equipment, qualified personnel, and their costs; and those factors identified under the caption "Risks Related to Pan Americans Business" in the Companys most recent Form 40F and Annual Information Form filed with the United States Securities and Exchange Commission and Canadian provincial securities regulatory authorities.

Investors are cautioned against attributing undue certainty or reliance on forward-looking statements.

Although the Company has attempted to identify important factors that could cause actual results to differ materially, there may be other factors that cause results not to be as anticipated, estimated, described or intended.

The Company does not intend, and does not assume any obligation, to update these forward-looking statements or information to reflect changes in assumptions or changes in circumstances or any other events affecting such statements or information, other than as required by applicable law.
CAUTIONARY NOTE TO US INVESTORS CONCERNING ESTIMATES OF MEASURED AND INDICATED RESOURCES
This news release has been prepared in accordance with the requirements of Canadian provincial securities laws, which differ from the requirements of U.S.

securities laws.

Unless otherwise indicated, all mineral reserve and resource estimates included in this news release have been prepared in accordance with Canadian National Instrument 43-101 - Standards of Disclosure for Mineral Projects (NI 43-101) and the Canadian Institute of Mining, Metallurgy and Petroleum classification system.

NI 43-101 is a rule developed by the Canadian Securities Administrators that establishes standards for all public disclosure an issuer makes of scientific and technical information concerning mineral projects.
Canadian standards, including NI 43-101, differ significantly from the requirements of the United States Securities and Exchange Commission (the "SEC"), and information concerning mineralization, deposits, mineral reserve and resource information contained or referred to herein may not be comparable to similar information disclosed by U.S. companies.

In particular, and without limiting the generality of the foregoing, this press release uses the terms measured resources, indicated resources and inferred resources.

U.S.

investors are advised that, while such terms are recognized and required by Canadian securities laws, the SEC does not recognize them.

Under U.S.

standards, mineralization may not be classified as a reserve unless the determination has been made that the mineralization could be economically and legally produced or extracted at the time the reserve determination is made.

U.S.

investors are cautioned not to assume that any part of a "measured resource" or "indicated resource" will ever be converted into a "reserve".

U.S.

investors should also understand that "inferred resources" have a great amount of uncertainty as to their existence and great uncertainty as to their economic and legal feasibility.

It cannot be assumed that all or any part of "inferred resources" exist, are economically or legally mineable or will ever be upgraded to a higher category.

Under Canadian securities laws, estimated "inferred resources" may not form the basis of feasibility or pre-feasibility studies except in rare cases.

Disclosure of "contained ounces" in a mineral resource is permitted disclosure under Canadian securities laws.

However, the SEC normally only permits issuers to report mineralization that does not constitute "reserves" by SEC standards as in place tonnage and grade, without reference to unit measures.

The requirements of NI 43-101 for identification of "reserves" are also not the same as those of the SEC, and reserves reported by the Company in compliance with NI 43-101 may not qualify as "reserves" under SEC standards.

Accordingly, information concerning mineral deposits set forth herein may not be comparable with information made public by companies that report in accordance with U.S.

standards.