Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 17-12-2020 and time 13:59:20 (Italy) in region 4 km S Acquacanina (MC)

A magnitude ML 1.1 earthquake occured in region: 4 km S Acquacanina (MC), on

  • 17-12-2020 12:59:20 (UTC)
  • 17-12-2020 13:59:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9950, 13.1640 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Acquacanina MC 4 121 121
Fiastra MC 5 559 680
Bolognola MC 5 142 822
Ussita MC 6 444 1266
Fiordimonte MC 8 202 1468
Visso MC 9 1107 2575
Pievebovigliana MC 10 866 3441
Pieve Torina MC 11 1458 4899
Castelsantangelo sul Nera MC 11 281 5180
Sarnano MC 12 3264 8444
Monte Cavallo MC 13 145 8589
Muccia MC 14 915 9504
Cessapalombo MC 15 512 10016
Montefortino FM 16 1178 11194
Amandola FM 16 3629 14823
Preci PG 16 724 15547
Gualdo MC 16 815 16362
Caldarola MC 17 1823 18185
Montemonaco AP 17 604 18789
Camerino MC 18 6974 25763
Camporotondo di Fiastrone MC 18 563 26326
San Ginesio MC 18 3498 29824
Serravalle di Chienti MC 19 1070 30894
Belforte del Chienti MC 20 1886 32780

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
58 Km NW of Teramo (54892 inhabitants)
64 Km NE of Terni (111501 inhabitants)
64 Km E of Perugia (166134 inhabitants)
74 Km N of L'Aquila (69753 inhabitants)
75 Km SW of Ancona (100861 inhabitants)
95 Km S of Fano (60888 inhabitants)
97 Km NW of Montesilvano (53738 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.1 2020-12-17
12:59:20		 42.9948 13.164 10 2020-12-17
13:11:57		 Sala Sismica INGV-Roma 85493681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-17 12:59:20 ± 0.08
Latitude 42.9948 ± 0.0027
Longitude 13.1640 ± 0.0037
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85493681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 316
Semi-minor axis of confidence ellipse (meter) 174
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 313
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.33725
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 85493681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-17 13:11:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-12-17T12:59:32.86 0.3 undecidable manual S 352 37.4292 50 0.12 72
IV.MF5.EHZ. 2020-12-17T12:59:29.44 0.3 undecidable manual S 92 23.9538 50 0.29 69
IV.MML1.EHE. 2020-12-17T12:59:28.03 0.6 undecidable manual S 310 20.3685 117 0 49
IV.CESI.HHZ. 2020-12-17T12:59:28.31 0.3 undecidable manual S 273 21.0678 116 0.07 74
IV.MNTT.EHZ. 2020-12-17T12:59:28.29 3.0 positive manual P 0.39 0
IV.EL6.EHZ. 2020-12-17T12:59:27.23 1.0 positive manual P 352 37.4292 50 -0.17 23
IV.PF6.EHE. 2020-12-17T12:59:26.40 0.6 undecidable manual S 9 16.0728 123 -0.32 47
IT.MTCL.HGZ. 2020-12-17T12:59:26.03 0.6 undecidable manual S 270 13.3755 128 0.08 49
IV.NRCA.HHZ. 2020-12-17T12:59:26.85 0.6 undecidable manual S 193 18.3705 119 -0.55 44
IV.MC2.EHZ. 2020-12-17T12:59:25.15 0.6 undecidable manual S 168 9.4794 137 0.2 48
IV.FEMA.HNZ. 2020-12-17T12:59:25.31 0.6 undecidable manual S 249 9.9789 136 0.24 48
IV.CSP1.EHZ. 2020-12-17T12:59:25.33 0.6 undecidable manual S 17 11.2776 132 -0.06 50
IV.MF5.EHZ. 2020-12-17T12:59:25.30 0.3 positive manual P 92 23.9538 50 -0.03 74
IV.FDMO.HHZ. 2020-12-17T12:59:24.37 0.6 undecidable manual S 307 7.7811 143 -0.2 49
IV.NRCA.HHZ. 2020-12-17T12:59:24.02 0.1 positive manual P 193 18.3705 119 -0.3 93
IV.MML1.EHE. 2020-12-17T12:59:24.66 0.1 undecidable manual P 310 20.3685 117 -0.02 98
IV.CESI.HHZ. 2020-12-17T12:59:24.77 0.3 negative manual P 273 21.0678 116 -0.03 73
IV.CSP1.EHZ. 2020-12-17T12:59:23.23 0.1 negative manual P 17 11.2776 132 0.07 98
IT.MTCL.HGZ. 2020-12-17T12:59:23.48 0.1 undecidable manual P 270 13.3755 128 0 100
IV.PF6.EHE. 2020-12-17T12:59:23.75 0.1 undecidable manual P 9 16.0728 123 -0.17 97
IV.MC2.EHZ. 2020-12-17T12:59:23.01 0.6 undecidable manual P 168 9.4794 137 0.11 49
IV.FEMA.HNZ. 2020-12-17T12:59:23.28 0.1 undecidable manual P 249 9.9789 136 0.31 95
IV.FDMO.HHZ. 2020-12-17T12:59:22.76 0.1 undecidable manual P 307 7.7811 143 0.08 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.2 0.00022700000000000002 1.72 AML other m 2020-12-17T12:59:24.00
IV.FDMO.HHE. ML:1.0 0.000146 0.62 AML other m 2020-12-17T12:59:25.34
IV.CSP1.EHN. ML:1.3 0.000215 0.48 AML other m 2020-12-17T12:59:25.61
IV.CSP1.EHE. ML:1.2 0.0002055 1.04 AML other m 2020-12-17T12:59:26.61
IV.NRCA.HHE. ML:1.2 0.00013350000000000002 1.06 AML other m 2020-12-17T12:59:27.01
IV.NRCA.HHN. ML:1.1 0.000112 0.14 AML other m 2020-12-17T12:59:27.77
IV.CESI.HHN. ML:0.8 0.00004355000000000001 0.18 AML other m 2020-12-17T12:59:28.42
IV.CESI.HHE. ML:0.7 0.00003545 1.08 AML other m 2020-12-17T12:59:29.60
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download