Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 18-09-2019 and time 01:14:33 (Italy) in region 3 km E Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 3 km E Norcia (PG), on

  • 17-09-2019 23:14:33 (UTC)
  • 18-09-2019 01:14:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8050, 13.1220 at 9 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 3 4957 4957
Castelsantangelo sul Nera MC 10 281 5238
Preci PG 11 724 5962
Cascia PG 13 3217 9179
Visso MC 14 1107 10286
Arquata del Tronto AP 15 1178 11464
Ussita MC 16 444 11908
Accumoli RI 16 667 12575
Cerreto di Spoleto PG 17 1075 13650
Montegallo AP 18 523 14173
Poggiodomo PG 18 117 14290
Sellano PG 18 1079 15369
Montemonaco AP 20 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
69 Km E of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km W of Pescara (121014 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
99 Km NW of Chieti (51815 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 2019-09-17
23:14:33		 42.8048 13.122 9 2020-02-28
16:42:16		 Bollettino Sismico Italiano INGV 75078681
Reviewed
Rev100 		ML 0.9 2019-09-17
23:14:33		 42.8072 13.1262 10 2019-09-17
23:20:41		 Sala Sismica INGV-Roma 72505121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-17 23:14:33 ± 0.08
Latitude 42.8048 ± 0.0027
Longitude 13.1220 ± 0.0049
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 75078681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 343
Semi-minor axis of confidence ellipse (meter) 273
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 99
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) 87
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.02878
Epicentral distance of station farthest from the epicenter (degree) 0.30757
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 75078681
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-12-29 10:38:05

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 9
Type of magnitude ML
Reference to an origin 72505121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-17 23:20:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHN. 2019-09-17T23:14:46.15 0.6 undecidable manual S 53 34.1436 50 0.4 44
IV.CESI.HNZ. 2019-09-17T23:14:44.00 0.6 undecidable manual S 322 28.3494 108 -0.1 47
IV.FDMO.HHZ. 2019-09-17T23:14:43.03 0.3 undecidable manual S 354 25.8519 110 -0.25 69
IV.LNSS.HHZ. 2019-09-17T23:14:42.59 0.6 undecidable manual S 197 23.3544 111 0.12 48
IV.GAVE.EHZ. 2019-09-17T23:14:42.33 0.6 undecidable manual S 236 22.3554 112 0.18 47
IV.T1299.HNZ. 2019-09-17T23:14:42.25 0.3 undecidable manual S 145 22.9548 112 -0.1 72
IV.MMO1.EHZ. 2019-09-17T23:14:41.06 0.6 undecidable manual S 58 19.6692 115 -0.23 47
IV.MF5.EHN. 2019-09-17T23:14:40.65 0.1 undecidable manual P 53 34.1436 50 -0.03 95
IV.FDMO.HHZ. 2019-09-17T23:14:39.03 0.1 undecidable manual P 354 25.8519 110 -0.22 93
IV.CESI.HNZ. 2019-09-17T23:14:39.70 0.3 undecidable manual P 322 28.3494 108 -0.03 72
IV.MC2.EHZ. 2019-09-17T23:14:39.82 0.3 undecidable manual S 25 12.9759 125 0.54 66
IV.T1299.HNZ. 2019-09-17T23:14:38.70 0.1 undecidable manual P 145 22.9548 112 -0.02 97
IV.LNSS.HHZ. 2019-09-17T23:14:38.69 0.1 undecidable manual P 197 23.3544 111 -0.1 95
IV.GAVE.EHZ. 2019-09-17T23:14:38.68 0.3 undecidable manual P 236 22.3554 112 0.08 72
IV.MMO1.EHZ. 2019-09-17T23:14:37.86 0.1 undecidable manual P 58 19.6692 115 -0.25 93
IV.NRCA.HHZ. 2019-09-17T23:14:37.09 0.1 undecidable manual S 349 3.1968 161 -0.04 100
IV.MC2.EHZ. 2019-09-17T23:14:37.15 0.1 undecidable manual P 25 12.9759 125 0.2 95
IV.NRCA.HHZ. 2019-09-17T23:14:35.88 0.1 undecidable manual P 349 3.1968 161 0.17 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:1.4 0.00038513065 0.1408 AML other m 2019-09-17T23:14:37.20
IV.NRCA.HHN. ML:1.4 0.0004065772 0.1408 AML other m 2019-09-17T23:14:37.20
IV.NRCA.HNE. ML:1.3 0.00036878575000000004 0.1024 AML other m 2019-09-17T23:14:37.77
IV.NRCA.HHE. ML:1.4 0.00039841860000000003 0.1152 AML other m 2019-09-17T23:14:37.72
IV.GAVE.EHN. ML:0.8 0.000041127114999999996 0.2176 AML other m 2019-09-17T23:14:42.66
IV.LNSS.HNE. ML:1.2 0.000094685039 0.3328 AML other m 2019-09-17T23:14:42.79
IV.LNSS.HHE. ML:1.0 0.000066231805 0.128 AML other m 2019-09-17T23:14:42.79
IV.LNSS.HHN. ML:1.0 0.00006047091 0.1536 AML other m 2019-09-17T23:14:42.84
IV.GAVE.HNE. ML:0.9 0.00004761734 1.552 AML other m 2019-09-17T23:14:43.03
IV.GAVE.EHE. ML:0.9 0.000047539025 0.2432 AML other m 2019-09-17T23:14:43.32
IV.LNSS.HNN. ML:1.2 0.00009284618 0.5888 AML other m 2019-09-17T23:14:43.46
IV.FDMO.HHE. ML:0.4 0.00001559031 0.1408 AML other m 2019-09-17T23:14:43.40
IV.FDMO.HHN. ML:0.5 0.000018531475 1.8848 AML other m 2019-09-17T23:14:44.01
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