Earthquake with magnitude of ML 0.9 on date 31-12-2019 and time 18:57:20 (Italy) in region 4 km SW Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 4 km SW Norcia (PG), on

  • 31-12-2019 17:57:20 (UTC)
  • 31-12-2019 18:57:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.76, 13.06 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
Norcia PG 4 4957 4957
Cascia PG 6 3217 8174
Poggiodomo PG 12 117 8291
Preci PG 13 724 9015
Cerreto di Spoleto PG 13 1075 10090
Monteleone di Spoleto PG 15 599 10689
Vallo di Nera PG 16 364 11053
Castelsantangelo sul Nera MC 17 281 11334
Accumoli RI 17 667 12001
Sellano PG 18 1079 13080
Cittareale RI 18 482 13562
Sant'Anatolia di Narco PG 19 564 14126
Visso MC 19 1107 15233
Scheggino PG 19 461 15694
Arquata del Tronto AP 20 1178 16872

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SE of Foligno (57155 inhabitants)
41 Km NE of Terni (111501 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
54 Km W of Teramo (54892 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
87 Km E of Viterbo (67173 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
93 Km W 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
Bulletin
Rev1000
ML 0.9 2019-12-31
17:57:20
42.76 13.06 10 2020-02-28
16:42:22
Bollettino Sismico Italiano INGV 76313881
Reviewed
Rev100
ML 0.9 2019-12-31
17:57:20
42.76 13.06 11 2019-12-31
18:07:15
Sala Sismica INGV-Roma 75143861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-31 17:57:20 ± 0.05
Latitude 42.76 ± 0.00
Longitude 13.06 ± 0.00
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 76313881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 435
Semi-minor axis of confidence ellipse (meter) 214
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 293
Circular confidence region, given by single value of horizontal uncertainty (meter) 430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 68
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.08004
Epicentral distance of station farthest from the epicenter (degree) 0.36153
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 9
Type of magnitude ML
Reference to an origin 75143861
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-31 18:07:15

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 76313881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-07 09:47:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2019-12-31T17:57:30.70 0.3 undecidable manual S 4 0.2734 50 -0.24 70
IV.MMO1.EHZ. 2019-12-31T17:57:29.90 0.3 undecidable manual S 55 0.2383 50 0 74
IV.MOMA.HNE. 2019-12-31T17:57:28.03 0.6 undecidable manual P 276 0.3615 50 0.1 47
IV.LNSS.HHZ. 2019-12-31T17:57:27.20 0.3 undecidable manual S 185 0.1619 120 -0.24 72
IV.CESI.HNE. 2019-12-31T17:57:26.34 0.6 undecidable manual P 335 0.2662 50 0.04 49
IV.SMA1.EHE. 2019-12-31T17:57:26.11 0.1 undecidable manual P 123 0.2428 50 0.21 95
IV.FDMO.HHZ. 2019-12-31T17:57:26.39 1.0 undecidable manual P 4 0.2734 50 -0.03 24
IV.GAVE.EHZ. 2019-12-31T17:57:26.80 0.3 undecidable manual S 239 0.1412 124 0.04 75
IV.RM33.EHE. 2019-12-31T17:57:26.38 0.6 undecidable manual P 156 0.2797 50 -0.15 48
IV.MMO1.EHZ. 2019-12-31T17:57:25.76 1.0 undecidable manual P 55 0.2383 50 -0.06 24
IV.LNSS.HHZ. 2019-12-31T17:57:24.38 0.1 undecidable manual P 185 0.1619 120 -0.02 100
IV.NRCA.HHZ. 2019-12-31T17:57:24.90 0.1 undecidable manual S 30 0.08 139 -0.09 100
IV.GAVE.EHZ. 2019-12-31T17:57:24.11 0.6 positive manual P 239 0.1412 124 0.1 49
IV.NRCA.HHZ. 2019-12-31T17:57:23.18 0.1 positive manual P 30 0.08 139 0.2 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:1.1 0.000153819625 0.1792 AML other m 2019-12-31T17:57:25.13
IV.NRCA.HHN. ML:0.9 9.28E-5 0.98 AML other m 2019-12-31T17:57:25.15
IV.GAVE.EHN. ML:0 0.0001225 1.78 AML other m 2019-12-31T17:57:27.09
IV.GAVE.EHE. ML:1.1 0.0001114 0.16 AML other m 2019-12-31T17:57:27.51
IV.LNSS.HHN. ML:0.9 6.245E-5 0.76 AML other m 2019-12-31T17:57:27.44
IV.LNSS.HHE. ML:0.9 6.575E-5 0.16 AML other m 2019-12-31T17:57:27.68
IV.FDMO.HHN. ML:0.6 1.853662E-5 0.192 AML other m 2019-12-31T17:57:31.38
IV.FDMO.HHE. ML:0.5 1.534753E-5 0.1152 AML other m 2019-12-31T17:57:31.78
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download