Earthquake with magnitude of ML 1.9 on date 16-12-2020 and time 16:21:44 (UTC) in region 4 km NE Amaro (UD)

A magnitude ML 1.9 earthquake occured in region: 4 km NE Amaro (UD), on

  • 16-12-2020 16:21:44 (UTC)
  • 16-12-2020 17:21:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.4, 13.13 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Amaro UD 4 823 823
Moggio Udinese UD 5 1714 2537
Resiutta UD 7 309 2846
Venzone UD 7 2117 4963
Cavazzo Carnico UD 8 1052 6015
Bordano UD 9 754 6769
Tolmezzo UD 9 10440 17209
Verzegnis UD 11 863 18072
Zuglio UD 11 595 18667
Arta Terme UD 12 2171 20838
Gemona del Friuli UD 13 10964 31802
Trasaghis UD 13 2227 34029
Resia UD 13 1033 35062
Chiusaforte UD 14 672 35734
Paularo UD 15 2623 38357
Dogna UD 15 175 38532
Lauco UD 16 729 39261
Montenars UD 16 538 39799
Osoppo UD 16 2936 42735
Villa Santina UD 16 2233 44968
Ligosullo UD 17 116 45084
Treppo Carnico UD 17 618 45702
Sutrio UD 17 1332 47034
Artegna UD 17 2885 49919
Paluzza UD 17 2217 52136
Lusevera UD 18 643 52779
Pontebba UD 18 1433 54212
Cercivento UD 18 679 54891
Magnano in Riviera UD 19 2336 57227
Enemonzo UD 20 1319 58546

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km N of Udine (99169 inhabitants)
61 Km NE of Pordenone (51229 inhabitants)
96 Km NW of Trieste (204420 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours) *

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985 *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire *

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.9 2020-12-16
16:21:44
46.4 13.13 10 2021-02-26
14:56:15
Bollettino Sismico Italiano INGV 86241561
Reviewed
Rev100
ML 2.0 2020-12-16
16:21:44
46.39 13.12 13 2020-12-16
16:30:15
Sala Sismica INGV-Roma 85471431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-16 16:21:44 ± 0.11
Latitude 46.40 ± 0.01
Longitude 13.13 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86241561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 936
Semi-minor axis of confidence ellipse (meter) 564
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 193
Circular confidence region, given by single value of horizontal uncertainty (meter) 940
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 110
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.48
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.7204
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 85471431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-16 16:30:15

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 25
Type of magnitude ML
Reference to an origin 86241561
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-23 18:26:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RMP.HHZ. 2020-12-16T16:23:40.12 3.0 undecidable manual Sn -9.84 0
IV.SACS.HHZ. 2020-12-16T16:23:26.59 3.0 undecidable manual Sn -0.42 0
IV.MNTT.EHZ. 2020-12-16T16:23:14.52 3.0 undecidable manual Sn -5.03 0
IV.VIVA.HHZ. 2020-12-16T16:23:04.42 3.0 undecidable manual Pg 8.49 0
IV.APEC.HHZ. 2020-12-16T16:23:00.58 3.0 undecidable manual Sn -7.6 0
OT.OT14.EHZ. 2020-12-16T16:22:59.21 3.0 negative manual Pn -0.38 0
IV.VVLD.HHZ. 2020-12-16T16:22:58.99 3.0 undecidable manual Pg 4.62 0
IV.RAVA.EHZ. 2020-12-16T16:22:45.97 3.0 undecidable manual Sn -4.8 0
IV.FIR.HHZ. 2020-12-16T16:22:33.92 3.0 undecidable manual Pn 1.44 0
SL.BOJS.BHZ. 2020-12-16T16:22:16.55 0.3 undecidable manual P 120 1.7204 38 1.33 29
ST.VARA.EHZ. 2020-12-16T16:22:15.76 0.1 undecidable manual P 251 1.6521 38 1.49 37
SI.LUSI.HHZ. 2020-12-16T16:22:14.48 0.3 undecidable manual P 255 1.5774 50 1.27 33
ST.DOSS.HHZ. 2020-12-16T16:22:12.19 0.3 undecidable manual P 250 1.4425 50 1.29 35
ST.OZOL.EHZ. 2020-12-16T16:22:12.37 0.3 undecidable manual P 271 1.4353 50 1.6 30
ST.PANI.EHZ. 2020-12-16T16:22:10.02 0.3 undecidable manual P 255 1.2914 50 1.7 29
SI.KOSI.HHZ. 2020-12-16T16:22:08.35 0.3 undecidable manual P 274 1.2123 50 1.4 36
OX.VARN.HHZ. 2020-12-16T16:22:00.93 0.3 undecidable manual P 241 0.8184 50 0.71 55
OX.DRE.HHZ. 2020-12-16T16:21:59.71 0.6 undecidable manual S 122 0.4173 50 -0.01 48
OX.PRED.HNZ. 2020-12-16T16:21:56.06 0.6 undecidable manual S 81 0.3004 50 -0.2 47
OX.ACOM.HHZ. 2020-12-16T16:21:56.54 0.6 undecidable manual S 60 0.3022 50 0.22 47
IV.FVI.HHZ. 2020-12-16T16:21:55.92 0.3 undecidable manual S 310 0.3157 50 -0.79 59
OX.SABO.HHZ. 2020-12-16T16:21:54.88 0.3 undecidable manual P 140 0.5351 50 -0.49 63
NI.PURA.HHZ. 2020-12-16T16:21:54.74 0.6 undecidable manual S 276 0.2725 50 -0.69 41
OX.CIMO.HHZ. 2020-12-16T16:21:53.56 0.6 undecidable manual P 260 0.4829 50 -0.93 36
OX.MPRI.HHZ. 2020-12-16T16:21:52.13 0.6 undecidable manual S 213 0.1853 116 -0.46 46
OX.BAD.HNZ. 2020-12-16T16:21:52.29 0.3 undecidable manual S 155 0.179 117 -0.07 74
NI.VINO.HHZ. 2020-12-16T16:21:52.05 0.6 undecidable manual S 146 0.1718 118 -0.09 49
OX.DRE.HHZ. 2020-12-16T16:21:52.80 0.1 undecidable manual P 122 0.4173 50 -0.55 85
OX.CLUD.HHZ. 2020-12-16T16:21:52.07 0.6 undecidable manual S 289 0.1844 116 -0.5 45
IV.STAL.HHZ. 2020-12-16T16:21:51.03 0.1 undecidable manual P 245 0.3229 50 -0.71 81
OX.ACOM.HHZ. 2020-12-16T16:21:51.43 0.1 undecidable manual P 60 0.3022 50 0.04 97
IV.PTCC.HHZ. 2020-12-16T16:21:51.69 0.1 undecidable manual S 86 0.152 121 0.24 96
IV.FVI.HHZ. 2020-12-16T16:21:51.27 0.1 positive manual P 310 0.3157 50 -0.35 91
OX.PRED.HNZ. 2020-12-16T16:21:51.20 0.1 undecidable manual P 81 0.3004 50 -0.16 95
RF.GEPF.HHZ. 2020-12-16T16:21:50.27 0.6 undecidable manual S 179 0.1205 127 -0.19 49
NI.PURA.HHZ. 2020-12-16T16:21:50.38 0.1 positive manual P 276 0.2725 50 -0.5 89
OX.FUSE.HHZ. 2020-12-16T16:21:49.81 0.1 undecidable manual S 281 0.0935 134 0.15 99
OX.BOO.HNZ. 2020-12-16T16:21:49.43 0.1 undecidable manual S 198 0.08 138 0.13 100
OX.CLUD.HHZ. 2020-12-16T16:21:49.02 0.1 positive manual P 289 0.1844 116 -0.21 96
OX.BAD.HNZ. 2020-12-16T16:21:48.87 0.1 undecidable manual P 155 0.179 117 -0.23 96
OX.MPRI.HHZ. 2020-12-16T16:21:48.97 0.1 negative manual P 213 0.1853 116 -0.27 95
RF.GEPF.HHZ. 2020-12-16T16:21:48.09 0.1 undecidable manual P 179 0.1205 127 0.08 100
IV.PTCC.HHZ. 2020-12-16T16:21:48.74 0.1 positive manual P 86 0.152 121 0.16 98
NI.VINO.HHZ. 2020-12-16T16:21:48.79 0.1 negative manual P 146 0.1718 118 -0.19 97
OX.BOO.HNZ. 2020-12-16T16:21:47.51 0.1 undecidable manual P 198 0.08 138 0.17 99
OX.FUSE.HHZ. 2020-12-16T16:21:47.70 0.1 negative manual P 281 0.0935 134 0.15 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTCC.HHN. ML:2.4 0.00222 0.14 AML other m 2020-12-16T16:21:51.84
IV.PTCC.HHE. ML:2 0.0008645 0.16 AML other m 2020-12-16T16:21:52.00
NI.VINO.HHN. ML:1.8 0.00043208045 0.2048 AML other m 2020-12-16T16:21:52.23
OX.CLUD.HHE. ML:1.7 0.0003570186 0.4224 AML other m 2020-12-16T16:21:52.44
OX.MPRI.HHE. ML:1.7 0.00034829585 0.32 AML other m 2020-12-16T16:21:52.43
OX.MPRI.HNE. ML:1.6 0.0002696105 0.32 AML other m 2020-12-16T16:21:52.27
NI.VINO.HHE. ML:1.6 0.00028063615 0.1792 AML other m 2020-12-16T16:21:52.31
OX.CLUD.HNN. ML:1.4 0.00019872525 0.1792 AML other m 2020-12-16T16:21:52.60
OX.CLUD.HHN. ML:1.5 0.00021127565 0.192 AML other m 2020-12-16T16:21:52.60
OX.CLUD.HNE. ML:1.7 0.00038361175 0.6016 AML other m 2020-12-16T16:21:52.44
OX.MPRI.HHN. ML:1.8 0.0004580664 0.2176 AML other m 2020-12-16T16:21:52.77
OX.MPRI.HNN. ML:1.7 0.0003648025 0.2304 AML other m 2020-12-16T16:21:52.76
IV.FVI.HHE. ML:2.4 0.001057 0.1 AML other m 2020-12-16T16:21:56.23
IV.FVI.HHN. ML:2.3 0.000897 0.12 AML other m 2020-12-16T16:21:56.25
OX.ACOM.HNN. ML:1.9 0.00035630905 0.5632 AML other m 2020-12-16T16:21:57.05
OX.ACOM.HNE. ML:2.1 0.0005285 1.62 AML other m 2020-12-16T16:21:56.97
OX.ACOM.HHN. ML:1.9 0.0003520445 0.3712 AML other m 2020-12-16T16:21:57.05
IV.STAL.HHN. ML:1.4 9.372485E-5 0.1792 AML other m 2020-12-16T16:21:57.80
IV.STAL.HHE. ML:1.4 0.000102955215 0.256 AML other m 2020-12-16T16:21:57.89
MN.TRI.HHE. ML:0 3.685E-5 0.1 AML other m 2020-12-16T16:22:16.33
MN.TRI.HHN. ML:0 2.47E-5 1.08 AML other m 2020-12-16T16:22:17.83
ST.DOSS.HHN. ML:2 4.427586E-5 0.4992 AML other m 2020-12-16T16:22:32.54
ST.OZOL.EHE. ML:2.2 7.2923E-5 0.2176 AML other m 2020-12-16T16:22:33.68
SI.LUSI.HHN. ML:2.2 6.251746E-5 0.4992 AML other m 2020-12-16T16:22:36.73
SI.LUSI.HHE. ML:2.2 5.605E-5 0.86 AML other m 2020-12-16T16:22:36.20
ST.VARA.EHN. ML:2.3 6.932829E-5 0.1792 AML other m 2020-12-16T16:22:39.42
IV.MAGA.HHN. ML:2.2 5.200334E-5 0.2176 AML other m 2020-12-16T16:22:45.13
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download