###### Abstract  
We mapped flow velocity and calving rates of the iconic Perito Moreno Glacier (PMG), belonging to the Southern Patagonian Icefield (SPI) in the Argentinian Patagonia. We tracked PMG from 2001 to 2017, focusing mostly upon the latest images from 2016-2017. PMG delivers about ca. \(10^{6}\) m\({}^{3}\) day\({}^{-1}\) of ice in the Lago Argentino, and its front periodically reaches the Peninsula Magallanes. Therein, the PMG causes an ice-dam, clogging Brazo Rico channel, and lifting water level by about 10 m, until ice-dam failure, normally occurring in March. Here, we used 36 pairs of satellite images with a resolution of 10 m (SENTINEL2, visible, 9 pairs of images) and 15 m (LANDSAT imagery, panchromatic, 27 pairs of images) to calculate surface velocity (\(V_{S}\)). We used Orientation Correlation technique, implemented via the ImGRAT(tm) TemplateMatch tool. Calving rates were then calculated with two methods, namely, (i) \(M1\), by ice flow through the glacier front, and (ii) \(M2\), by ice flow at 7.5 km upstream of the front minus ablation losses. Surface velocity ranged from about 4 m day\({}^{-1}\) in the accumulation area to about 2 m day\({}^{-1}\) in the calving front, but it is variable seasonally with maxima in the summer (December-January-February). Calving rate (\(CR_{M}\)) ranges from 7.72 \(\times\)\(10^{5}\)\(\pm\) 32% to 8.76 \(\times\)\(10^{5}\)\(\pm\) 31% m\({}^{3}\) day\({}^{-1}\), in line with recent studies, also with maxima in the summer. We found slightly lower flow velocity and calving rates than previously published values, but our estimates cover a different period, and a generally large uncertainty in flow assessment suggests a recent overall stability of the glacier. P 2021 2021 202  
the proglacial lake and collapse of the ice-dam [12; 13]. The near-steady behavior of the glacier may be attributed to the downslope bedrock topography near the glacier tongue [8]. Several studies have revealed empirically that calving rates are linearly related to water depth [14; 15], so that the calving rate of PMG may increase with the front advancement and decrease with a retreat. Thus, calving has a regulating effect upon tongue fluctuations. However, this stable condition is rather rare worldwide. As an example, the well-known Karakoram Anomaly refers to glaciers within Karakoram Range having remained rather stable (area-wise) in the early twenty-first century, in contrast to general glacier retreat as observed worldwide [16]. Causes of such an anomaly are found in (i) the recent increase of snow cover areas seasonally, (ii) the increased number of snowfall events lately, and (iii) the reduction of mean summer temperatures. Before the 1970s, few preliminary studies investigated a Patagonia glacier (e.g., [17]). In 1983 and 1985, detailed surveys of flow velocity were carried out over two glaciers, namely, Glaciers _Soler_ and _San Rafael_[18] in the _Campo de Hielo Patagonico Norte_ (Northern Patagonia Ice field, NPI). Tidewater and freshwater calving phenomena were studied by [PERSON] et al. [15; 19]. A comprehensive glaciological study on PMG was performed under the support of the Japan-Argentina-Chile joint Glacier Research Project in Patagonia (GRPP) in the austral summers of 1990-1991 and 1993-1994, when measurements of surface elevation, ice flow and heat balance were carried out in the ablation area [20; 21]. Another joint program on mass balance and ice dynamics of the glacier based on field research and satellite data analyses was initiated in 1995, in cooperation between Innsbruck University, Instituto Antartico Argentino, and Alfred-Wegener Institut [8]. More recently, [PERSON] et al. [22; 23] studied the PMG to assess seasonal variations of front position as controlled by seasonal ablation, glacier calving, and corresponding tsunami waves at glacier's toe. [PERSON] et al. [22] focused on measuring front position and ice surface speed from 1999 to 2013, depending upon air and water temperature.