Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 22-07-2019 and time 18:30:19 (Italy) in region 6 km NE Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 6 km NE Norcia (PG), on

  • 22-07-2019 16:30:19 (UTC)
  • 22-07-2019 18:30:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8270, 13.1580 at 9 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
Norcia PG 7 4957 4957
Castelsantangelo sul Nera MC 8 281 5238
Preci PG 11 724 5962
Arquata del Tronto AP 13 1178 7140
Visso MC 13 1107 8247
Ussita MC 13 444 8691
Montegallo AP 14 523 9214
Montemonaco AP 16 604 9818
Accumoli RI 16 667 10485
Cascia PG 17 3217 13702
Bolognola MC 20 142 13844
Cerreto di Spoleto PG 20 1075 14919
Montefortino FM 20 1178 16097

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
48 Km W of Teramo (54892 inhabitants)
51 Km NE of Terni (111501 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
95 Km W of Pescara (121014 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
98 Km NW of Chieti (51815 inhabitants)
98 Km NE of Guidonia Montecelio (88673 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 0.9 2019-07-22
16:30:19		 42.8272 13.1585 9 2019-07-22
16:50:43		 Sala Sismica INGV-Roma 70799071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-07-22 16:30:19 ± 0.09
Latitude 42.8272 ± 0.0054
Longitude 13.1585 ± 0.0049
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 70799071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 495
Semi-minor axis of confidence ellipse (meter) 435
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) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.03327
Epicentral distance of station farthest from the epicenter (degree) 0.42448
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 70799071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-07-22 16:50:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2019-07-22T16:30:28.12 1.0 positive manual P 301 47.1195 50 -0.24 23
IV.MTRA.EHZ. 2019-07-22T16:30:27.22 0.6 undecidable manual S 112 20.868 112 0.03 50
IV.RM33.EHZ. 2019-07-22T16:30:26.50 0.3 undecidable manual P 173 35.5422 50 -0.08 72
IV.MF5.EHZ. 2019-07-22T16:30:25.60 0.6 negative manual P 54 30.2475 106 -0.06 49
IV.MMO1.EHZ. 2019-07-22T16:30:25.37 0.3 undecidable manual S 60 15.873 118 -0.24 72
IV.MTRA.EHZ. 2019-07-22T16:30:24.03 0.3 undecidable manual P 112 20.868 112 0.15 73
IV.MC2.EHZ. 2019-07-22T16:30:23.92 0.3 undecidable manual S 15 9.6792 132 0.08 76
IV.MC2.EHZ. 2019-07-22T16:30:22.10 0.1 undecidable manual P 15 9.6792 132 0.16 99
IV.MMO1.EHZ. 2019-07-22T16:30:22.96 0.3 undecidable manual P 60 15.873 118 -0.01 76
IV.NRCA.HNZ. 2019-07-22T16:30:22.34 0.3 undecidable manual S 281 3.6963 157 -0.25 74
IV.NRCA.HNZ. 2019-07-22T16:30:21.39 0.1 positive manual P 281 3.6963 157 0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHN. ML:0.8 0.00005115 0.28 AML other m 2019-07-22T16:30:27.61
IV.MTRA.EHE. ML:1.0 0.0000729 0.62 AML other m 2019-07-22T16:30:28.45
IV.ASSB.HHN. ML:0.8 0.00001905 0.38 AML other m 2019-07-22T16:30:34.97
IV.ASSB.HHE. ML:0.7 0.0000164 0.6 AML other m 2019-07-22T16:30:35.46
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