Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 10-12-2020 and time 00:02:08 (Italy) in region 5 km S Bolognola (MC)

A magnitude ML 1.1 earthquake occured in region: 5 km S Bolognola (MC), on

  • 09-12-2020 23:02:08 (UTC)
  • 10-12-2020 00:02:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9500, 13.2270 at 7 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
Bolognola MC 5 142 142
Ussita MC 7 444 586
Castelsantangelo sul Nera MC 8 281 867
Montefortino FM 9 1178 2045
Montemonaco AP 10 604 2649
Acquacanina MC 10 121 2770
Amandola FM 11 3629 6399
Fiastra MC 11 559 6958
Sarnano MC 11 3264 10222
Visso MC 11 1107 11329
Montegallo AP 15 523 11852
Fiordimonte MC 15 202 12054
Comunanza AP 15 3166 15220
Gualdo MC 16 815 16035
Preci PG 17 724 16759
Pievebovigliana MC 17 866 17625
Pieve Torina MC 18 1458 19083
Cessapalombo MC 18 512 19595
Smerillo FM 19 365 19960
Monte Cavallo MC 19 145 20105
San Ginesio MC 19 3498 23603
Montefalcone Appennino FM 20 424 24027
Monte San Martino MC 20 765 24792
Palmiano AP 20 196 24988

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
51 Km NW of Teramo (54892 inhabitants)
64 Km NE of Terni (111501 inhabitants)
68 Km N of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
78 Km SW of Ancona (100861 inhabitants)
90 Km NW of Montesilvano (53738 inhabitants)
97 Km NW of Pescara (121014 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 2020-12-09
23:02:08		 42.9495 13.2268 7 2020-12-09
23:12:14		 Sala Sismica INGV-Roma 85325581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-09 23:02:08 ± 0.19
Latitude 42.9495 ± 0.0045
Longitude 13.2268 ± 0.0049
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85325581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 435
Semi-minor axis of confidence ellipse (meter) 208
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 344
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.24192
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 85325581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-09 23:12:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-12-09T23:02:23.84 3.0 undecidable manual S -0.23 0
IV.CESI.HHZ. 2020-12-09T23:02:18.72 0.6 undecidable manual S 283 26.8509 105 0.21 47
IT.MTCL.HGZ. 2020-12-09T23:02:16.23 0.6 undecidable manual S 285 19.0698 111 0.28 47
IV.MF5.EHZ. 2020-12-09T23:02:16.55 0.6 undecidable manual S 77 19.3695 111 0.51 45
IV.GUMA.HHZ. 2020-12-09T23:02:15.15 0.3 undecidable manual S 35 15.3735 116 0.4 69
IV.CSP1.EHZ. 2020-12-09T23:02:15.07 0.6 undecidable manual S 354 15.873 115 0.15 49
IV.NRCA.HHZ. 2020-12-09T23:02:15.30 0.3 undecidable manual S 215 15.7731 115 0.41 69
IV.FDMO.HHZ. 2020-12-09T23:02:14.45 0.3 undecidable manual S 311 14.874 116 -0.15 73
IV.CESI.HHZ. 2020-12-09T23:02:14.37 0.3 negative manual P 283 26.8509 105 -0.06 73
IV.MF5.EHZ. 2020-12-09T23:02:13.29 0.3 undecidable manual P 77 19.3695 111 0.29 70
IV.NRCA.HHZ. 2020-12-09T23:02:12.41 0.1 negative manual P 215 15.7731 115 0.07 99
IV.GUMA.HHZ. 2020-12-09T23:02:12.22 0.3 undecidable manual P 35 15.3735 116 -0.03 75
IT.MTCL.HGZ. 2020-12-09T23:02:12.94 0.6 undecidable manual P 285 19.0698 111 -0.01 50
IV.MMO1.EHZ. 2020-12-09T23:02:12.73 0.3 undecidable manual S 124 9.879 127 -0.38 70
IV.PF6.EHZ. 2020-12-09T23:02:12.88 0.3 undecidable manual P 353 21.0678 109 -0.43 68
IV.FDMO.HHZ. 2020-12-09T23:02:11.91 0.6 positive manual P 311 14.874 116 -0.26 48
IV.MC2.EHZ. 2020-12-09T23:02:11.96 0.3 undecidable manual S 216 5.1948 145 -0.01 76
IV.CSP1.EHZ. 2020-12-09T23:02:11.97 0.6 positive manual P 354 15.873 115 -0.38 46
IV.MC2.EHZ. 2020-12-09T23:02:10.55 0.1 positive manual P 216 5.1948 145 -0.1 100
IV.MMO1.EHZ. 2020-12-09T23:02:10.99 0.3 positive manual P 124 9.879 127 -0.31 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0.6 0.000042391735 0.3072 AML other m 2020-12-09T23:02:16.44
IV.FDMO.HHN. ML:0.5 0.000036139245 0.2176 AML other m 2020-12-09T23:02:15.86
IV.CSP1.EHE. ML:1.0 0.00009407106 0.2432 AML other m 2020-12-09T23:02:16.19
IV.CSP1.EHN. ML:1.0 0.000102872615 0.32 AML other m 2020-12-09T23:02:16.76
IV.NRCA.HHE. ML:1.2 0.00016278 0.1664 AML other m 2020-12-09T23:02:15.53
IV.NRCA.HHN. ML:1.0 0.00010739573 0.1152 AML other m 2020-12-09T23:02:16.48
IV.NRCA.HNE. ML:1.5 0.00029561905 2.816 AML other m 2020-12-09T23:02:15.95
IV.NRCA.HNN. ML:1.3 0.00020597159999999998 3.4432 AML other m 2020-12-09T23:02:15.42
IV.CESI.HNN. ML:1.4 0.00013722025 0.704 AML other m 2020-12-09T23:02:22.97
IV.CESI.HHE. ML:1.0 0.000057497325000000004 0.2048 AML other m 2020-12-09T23:02:18.96
IV.CESI.HHN. ML:0.9 0.000046545085 0.1408 AML other m 2020-12-09T23:02:19.15
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