Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 01-02-2020 and time 17:57:27 (UTC) in region 5 km SW Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 5 km SW Norcia (PG), on

  • 01-02-2020 17:57:27 (UTC)
  • 01-02-2020 18:57:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7530, 13.0650 at 8 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
Norcia PG 5 4957 4957
Cascia PG 6 3217 8174
Poggiodomo PG 12 117 8291
Cerreto di Spoleto PG 14 1075 9366
Preci PG 14 724 10090
Monteleone di Spoleto PG 15 599 10689
Accumoli RI 16 667 11356
Vallo di Nera PG 17 364 11720
Cittareale RI 17 482 12202
Castelsantangelo sul Nera MC 17 281 12483
Sant'Anatolia di Narco PG 19 564 13047
Sellano PG 19 1079 14126
Arquata del Tronto AP 19 1178 15304
Scheggino PG 20 461 15765
Visso MC 20 1107 16872

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SE of Foligno (57155 inhabitants)
40 Km NE of Terni (111501 inhabitants)
52 Km NW of L'Aquila (69753 inhabitants)
53 Km W of Teramo (54892 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
87 Km E of Viterbo (67173 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
99 Km W 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
Bulletin
Rev1000 		ML 0.9 2020-02-01
17:57:27		 42.7533 13.0647 8 2020-07-18
21:08:33		 Bollettino Sismico Italiano INGV 78417721
Reviewed
Rev100 		ML 0.9 2020-02-01
17:57:27		 42.7523 13.0572 8 2020-02-01
18:05:10		 Sala Sismica INGV-Roma 76106861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-01 17:57:27 ± 0.17
Latitude 42.7533 ± 0.0027
Longitude 13.0647 ± 0.0049
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 78417721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 385
Semi-minor axis of confidence ellipse (meter) 199
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 118
Circular confidence region, given by single value of horizontal uncertainty (meter) 390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 140
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.24372
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 78417721
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-04-20 16:38:35

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 76106861
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-01 18:05:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CR.ZAG.BHZ. 2020-02-01T17:59:26.84 3.0 undecidable manual Sg 14.52 0
IV.PIPA.HHZ. 2020-02-01T17:59:22.59 3.0 undecidable manual Sn -6 0
IV.LPDG.HHZ. 2020-02-01T17:59:17.67 3.0 undecidable manual Pn 1.47 0
IV.ZONE.HHZ. 2020-02-01T17:59:15.95 3.0 undecidable manual Sn 4.48 0
IV.VARE.HHZ. 2020-02-01T17:58:46.77 3.0 undecidable manual Pg 10.61 0
IV.SPS2.HHZ. 2020-02-01T17:58:44.43 3.0 negative manual Pg 9.26 0
IV.TDS.HHZ. 2020-02-01T17:58:40.06 3.0 undecidable manual Pg 9.01 0
IV.IST3.HHZ. 2020-02-01T17:58:38.05 3.0 negative manual Pn 2.47 0
IV.PTRJ.HHZ. 2020-02-01T17:58:28.38 3.0 undecidable manual Sg 2.25 0
IT.LRNO.HNZ. 2020-02-01T17:58:25.36 3.0 undecidable manual Sg 1.78 0
IV.BRIS.HHZ. 2020-02-01T17:58:24.69 3.0 undecidable manual Sg 0.43 0
IV.MNTV.HNZ. 2020-02-01T17:58:18.28 3.0 undecidable manual Pg 2.46 0
GU.GRAM.HHZ. 2020-02-01T17:58:12.59 3.0 negative manual Pn -1.72 0
IV.VIVA.HHZ. 2020-02-01T17:57:51.11 3.0 undecidable manual P 0.4 0
IV.CPGN.EHZ. 2020-02-01T17:57:51.43 3.0 undecidable manual P -0.68 0
IV.PTQR.HHZ. 2020-02-01T17:57:44.36 3.0 undecidable manual P -1.58 0
IV.ARVD.HHZ. 2020-02-01T17:57:39.72 3.0 negative manual P -4.41 0
IV.MTRA.HNZ. 2020-02-01T17:57:37.32 0.6 undecidable manual S 89 27.0507 107 0.09 48
IV.SMA1.EHZ. 2020-02-01T17:57:37.15 0.3 undecidable manual S 122 25.9518 107 0.29 69
IV.MC2.EHE. 2020-02-01T17:57:35.12 0.3 undecidable manual S 30 20.2686 112 0.12 73
IV.GAVE.HNZ. 2020-02-01T17:57:33.50 0.6 undecidable manual S 244 15.4734 118 0.02 50
IV.LNSS.HHZ. 2020-02-01T17:57:33.79 0.1 undecidable manual S 187 16.7721 116 -0.11 98
IV.MTRA.HNZ. 2020-02-01T17:57:32.78 0.3 undecidable manual P 89 27.0507 107 -0.31 69
IV.SMA1.EHZ. 2020-02-01T17:57:32.74 0.3 undecidable manual P 122 25.9518 107 -0.14 72
IV.LNSS.HHZ. 2020-02-01T17:57:31.18 0.3 undecidable manual P 187 16.7721 116 0.01 75
IV.MC2.EHE. 2020-02-01T17:57:31.76 0.6 undecidable manual P 30 20.2686 112 -0.04 49
IV.NRCA.HHZ. 2020-02-01T17:57:31.73 0.1 undecidable manual S 24 9.7791 129 -0.1 99
IV.GAVE.HNZ. 2020-02-01T17:57:31.11 0.3 undecidable manual P 244 15.4734 118 0.19 72
IV.NRCA.HHZ. 2020-02-01T17:57:30.02 0.1 undecidable manual P 24 9.7791 129 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.4 0.00032269605 0.192 AML other m 2020-02-01T17:57:31.87
IV.NRCA.HHN. ML:1.0 0.00013915264999999998 0.1024 AML other m 2020-02-01T17:57:31.92
IV.LNSS.HHE. ML:1.2 0.00014900000000000002 0.36 AML other m 2020-02-01T17:57:34.05
IV.LNSS.HHN. ML:1.2 0.00014000000000000001 0.78 AML other m 2020-02-01T17:57:34.05
IV.SMA1.EHN. ML:0.6 0.000026249999999999998 0.82 AML other m 2020-02-01T17:57:37.67
IV.RM33.EHN. ML:0.8 0.0000293 0.84 AML other m 2020-02-01T17:57:38.59
IV.RM33.EHE. ML:0.7 0.000027400000000000002 0.14 AML other m 2020-02-01T17:57:39.35
IV.SMA1.EHE. ML:0.6 0.000022983644999999998 1.7312 AML other m 2020-02-01T17:57:39.90
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