Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 09-12-2021 and time 07:36:34 (Italy) in region 2 km N Preci (PG)

A magnitude ML 1.6 earthquake occured in region: 2 km N Preci (PG), on

  • 09-12-2021 06:36:34 (UTC)
  • 09-12-2021 07:36:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9000, 13.0340 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.

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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
Preci PG 2 724 724
Visso MC 6 1107 1831
Sellano PG 9 1079 2910
Castelsantangelo sul Nera MC 10 281 3191
Ussita MC 10 444 3635
Monte Cavallo MC 11 145 3780
Norcia PG 13 4957 8737
Cerreto di Spoleto PG 13 1075 9812
Fiordimonte MC 16 202 10014
Pieve Torina MC 16 1458 11472
Fiastra MC 18 559 12031
Acquacanina MC 19 121 12152
Pievebovigliana MC 19 866 13018
Bolognola MC 19 142 13160

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
49 Km NE of Terni (111501 inhabitants)
57 Km E of Perugia (166134 inhabitants)
61 Km W of Teramo (54892 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
89 Km SW of Ancona (100861 inhabitants)
93 Km NE of Viterbo (67173 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
Bulletin
Rev1000 		ML 1.6 2021-12-09
06:36:34		 42.9003 13.034 10 2022-03-30
13:04:27		 Bollettino Sismico Italiano INGV 99434561
Reviewed
Rev100 		ML 1.8 2021-12-09
06:36:34		 42.9002 13.0373 11 2021-12-09
06:41:27		 Sala Sismica INGV-Roma 98338101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-09 06:36:34 ± 0.05
Latitude 42.9003 ± 0.0027
Longitude 13.0340 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99434561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 344
Semi-minor axis of confidence ellipse (meter) 245
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 67
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 44
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.06295
Epicentral distance of station farthest from the epicenter (degree) 0.56567
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 98338101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-09 06:41:27

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 44
Type of magnitude ML
Reference to an origin 99434561
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-07 09:39:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GUMA.HHZ. 2021-12-09T06:36:45.20 0.3 undecidable manual S 54 30.3474 50 0.13 73
IV.SSFR.HHZ. 2021-12-09T06:36:45.75 0.3 undecidable manual P 341 62.7927 50 0.26 67
IV.TERO.HHZ. 2021-12-09T06:36:44.10 0.6 undecidable manual P 123 55.6998 50 -0.28 45
IV.CSP1.EHZ. 2021-12-09T06:36:43.30 0.3 undecidable manual S 33 25.3524 111 -0.32 71
IV.EL6.EHZ. 2021-12-09T06:36:43.02 0.3 undecidable manual P 7 47.9187 50 -0.16 70
IV.FOSV.HNE. 2021-12-09T06:36:43.89 0.6 undecidable manual P 333 49.0176 50 0.54 43
IV.GAVE.EHZ. 2021-12-09T06:36:43.40 0.3 undecidable manual S 206 25.752 111 -0.35 70
IV.ARRO.EHZ. 2021-12-09T06:36:42.36 0.6 undecidable manual P 212 41.8248 50 0.12 48
IV.MML1.EHZ. 2021-12-09T06:36:42.80 0.3 undecidable manual S 348 24.1536 112 -0.44 69
IV.MOMA.HHZ. 2021-12-09T06:36:42.24 0.3 undecidable manual P 254 39.2274 50 0.4 68
IV.MMO1.EHZ. 2021-12-09T06:36:42.70 0.3 undecidable manual S 90 23.754 112 -0.42 69
IV.SNTG.HHZ. 2021-12-09T06:36:41.76 0.3 undecidable manual P 349 40.0266 50 -0.21 70
IV.MF5.EHZ. 2021-12-09T06:36:41.76 0.6 undecidable manual P 74 35.9418 50 0.43 45
IV.SMA1.EHZ. 2021-12-09T06:36:41.61 0.3 undecidable manual P 141 38.7279 50 -0.16 71
IV.MC2.EHZ. 2021-12-09T06:36:40.00 0.3 undecidable manual S 84 12.6762 127 0.26 73
IV.ASSB.HHZ. 2021-12-09T06:36:40.85 0.3 undecidable manual P 298 34.3434 50 -0.24 71
IV.GUMA.HHZ. 2021-12-09T06:36:40.60 0.3 undecidable manual P 54 30.3474 50 0.12 73
IV.CESI.HHZ. 2021-12-09T06:36:40.30 0.3 undecidable manual S 318 15.6732 122 -0.29 72
IV.MTRA.EHZ. 2021-12-09T06:36:40.73 0.3 undecidable manual P 118 33.5442 50 -0.24 71
IV.FDMO.HHZ. 2021-12-09T06:36:40.50 0.3 undecidable manual S 16 15.6732 122 -0.11 75
IV.LNSS.HHZ. 2021-12-09T06:36:40.66 0.3 undecidable manual P 179 33.0447 50 -0.23 71
IV.CSP1.EHZ. 2021-12-09T06:36:39.51 0.3 undecidable manual P 33 25.3524 111 -0.14 73
IV.MML1.EHZ. 2021-12-09T06:36:39.29 0.3 undecidable manual P 348 24.1536 112 -0.14 74
IT.MTCL.HGZ. 2021-12-09T06:36:39.20 0.3 undecidable manual S 345 10.7781 132 -0.03 77
IV.GAVE.EHZ. 2021-12-09T06:36:39.69 0.1 undecidable manual P 206 25.752 111 -0.03 100
IV.MMO1.EHZ. 2021-12-09T06:36:39.23 0.3 undecidable manual P 90 23.754 112 -0.12 74
IV.NRCA.HHZ. 2021-12-09T06:36:39.00 0.3 undecidable manual S 139 9.879 134 -0.01 77
IV.CESI.HHZ. 2021-12-09T06:36:38.17 0.1 negative manual P 318 15.6732 122 0.28 97
IV.FDMO.HHZ. 2021-12-09T06:36:38.02 0.3 undecidable manual P 16 15.6732 122 0.12 75
IV.FEMA.HNZ. 2021-12-09T06:36:38.50 0.3 undecidable manual S 11 6.993 144 0.15 76
IV.NRCA.HHZ. 2021-12-09T06:36:37.21 0.1 undecidable manual P 139 9.879 134 0.23 99
IV.MC2.EHZ. 2021-12-09T06:36:37.70 0.1 undecidable manual P 84 12.6762 127 0.3 97
IT.MTCL.HGZ. 2021-12-09T06:36:37.32 0.3 undecidable manual P 345 10.7781 132 0.22 74
IV.FEMA.HNZ. 2021-12-09T06:36:36.97 0.3 undecidable manual P 11 6.993 144 0.37 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FEMA.HNE. ML:1.8 0.00100330845 0.1696 AML other m 2021-12-09T06:36:39.28
IV.FEMA.HNN. ML:1.6 0.0006343258 0.0896 AML other m 2021-12-09T06:36:39.58
IV.NRCA.HNN. ML:2.1 0.001815 0.14 AML other m 2021-12-09T06:36:39.20
IV.NRCA.HHN. ML:2.2 0.00191 0.14 AML other m 2021-12-09T06:36:39.20
IT.MTCL.HGN. ML:3.5 0.04337688 0.0608 AML other m 2021-12-09T06:36:39.36
IV.NRCA.HNE. ML:1.9 0.00105454395 0.1696 AML other m 2021-12-09T06:36:39.48
IV.NRCA.HHE. ML:1.9 0.001145 0.18 AML other m 2021-12-09T06:36:39.48
IT.MTCL.HGE. ML:3.5 0.037822045000000006 0.0896 AML other m 2021-12-09T06:36:39.96
IV.FDMO.HHE. ML:1.6 0.00034506455000000004 0.2592 AML other m 2021-12-09T06:36:40.96
IV.MC2.EHN. ML:2.0 0.0010765 0.18 AML other m 2021-12-09T06:36:41.15
IV.CESI.HNE. ML:1.5 0.00027222995 0.16 AML other m 2021-12-09T06:36:41.43
IV.CESI.HHE. ML:1.5 0.0003235014 0.24 AML other m 2021-12-09T06:36:41.43
IV.CESI.HNN. ML:1.7 0.00053378485 0.1216 AML other m 2021-12-09T06:36:41.18
IV.CESI.HHN. ML:1.7 0.0005326514499999999 0.1216 AML other m 2021-12-09T06:36:41.18
IV.FDMO.HHN. ML:1.5 0.00027012125 0.24 AML other m 2021-12-09T06:36:41.31
IV.MC2.EHE. ML:1.7 0.0006135 0.2 AML other m 2021-12-09T06:36:41.29
IV.MMO1.EHN. ML:1.9 0.00045603355000000003 0.2208 AML other m 2021-12-09T06:36:43.58
IV.MMO1.EHE. ML:1.7 0.00032299999999999994 0.2 AML other m 2021-12-09T06:36:43.26
IV.MML1.EHN. ML:1.4 0.0001637335 0.1792 AML other m 2021-12-09T06:36:43.46
IV.MML1.EHE. ML:1.2 0.000093149475 0.1408 AML other m 2021-12-09T06:36:43.52
IV.GAVE.EHE. ML:1.5 0.00016748985 0.1184 AML other m 2021-12-09T06:36:44.26
IV.GAVE.EHN. ML:1.4 0.00015515 0.98 AML other m 2021-12-09T06:36:44.42
IV.MML1.HNE. ML:1.2 0.00010663084499999999 0.16 AML other m 2021-12-09T06:36:43.51
IV.MML1.HNN. ML:1.4 0.00015551413 0.0704 AML other m 2021-12-09T06:36:43.46
IV.CSP1.EHE. ML:1.4 0.00015922393499999998 45.12 AML other m 2021-12-09T06:36:39.59
IV.CSP1.EHN. ML:1.7 0.000291088 0.1792 AML other m 2021-12-09T06:36:44.09
IV.GAVE.HNE. ML:1.5 0.00018530519 0.1312 AML other m 2021-12-09T06:36:44.25
IV.GUMA.HNN. ML:1.6 0.00021406587500000002 0.1024 AML other m 2021-12-09T06:36:45.44
IV.GUMA.HHE. ML:1.8 0.00031753390000000003 0.1376 AML other m 2021-12-09T06:36:45.52
IV.GUMA.HNE. ML:1.7 0.000260462465 0.3424 AML other m 2021-12-09T06:36:46.69
IV.LNSS.HHN. ML:1.4 0.00011933292 0.1824 AML other m 2021-12-09T06:36:46.44
IV.LNSS.HNE. ML:1.5 0.00013177337 0.24 AML other m 2021-12-09T06:36:45.89
IV.LNSS.HHE. ML:1.4 0.00010811463500000001 0.1792 AML other m 2021-12-09T06:36:45.92
IV.MTRA.EHE. ML:1.4 0.00011159068999999999 0.0992 AML other m 2021-12-09T06:36:46.26
IV.MTRA.HNE. ML:1.5 0.000138116185 0.4576 AML other m 2021-12-09T06:36:44.40
IV.ASSB.HHE. ML:1.2 0.000063824785 0.16 AML other m 2021-12-09T06:36:46.80
IV.ASSB.HHN. ML:1.3 0.00008010653500000001 0.1824 AML other m 2021-12-09T06:36:46.38
IV.SMA1.EHE. ML:1.4 0.00008996132499999999 0.4224 AML other m 2021-12-09T06:36:52.62
IV.SNTG.HHE. ML:1.3 0.000062530525 0.0992 AML other m 2021-12-09T06:36:48.17
IV.SNTG.HHN. ML:1.3 0.000062691 0.1184 AML other m 2021-12-09T06:36:48.19
IV.MOMA.HHN. ML:1.2 0.000061220845 0.1376 AML other m 2021-12-09T06:36:49.58
IV.MOMA.HHE. ML:1.2 0.00005642184 0.1216 AML other m 2021-12-09T06:36:49.01
IV.SSFR.HHE. ML:1.5 0.00006666234 0.1984 AML other m 2021-12-09T06:36:56.04
IV.SSFR.HHN. ML:1.4 0.000056889 0.1408 AML other m 2021-12-09T06:36:55.53
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