Earthquake with magnitude of ML 0.8 on date 22-08-2019 and time 06:16:53 (Italy) in region 4 km SE Norcia (PG)

A magnitude ML 0.8 earthquake occured in region: 4 km SE Norcia (PG), on

  • 22-08-2019 04:16:53 (UTC)
  • 22-08-2019 06:16:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.76, 13.12 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.

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 10 3217 8174
Accumoli RI 13 667 8841
Arquata del Tronto AP 15 1178 10019
Preci PG 15 724 10743
Castelsantangelo sul Nera MC 16 281 11024
Poggiodomo PG 16 117 11141
Cittareale RI 16 482 11623
Cerreto di Spoleto PG 18 1075 12698
Monteleone di Spoleto PG 18 599 13297
Visso MC 19 1107 14404
Montegallo AP 20 523 14927
Amatrice RI 20 2657 17584

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
71 Km SE of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
95 Km W of Pescara (121014 inhabitants)
97 Km W of Chieti (51815 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 0.8 2019-08-22
04:16:53
42.76 13.12 9 2019-08-22
06:45:40
Sala Sismica INGV-Roma 71693531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-22 04:16:53 ± 0.11
Latitude 42.76 ± 0.01
Longitude 13.12 ± 0.01
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 71693531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 691
Semi-minor axis of confidence ellipse (meter) 529
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 318
Circular confidence region, given by single value of horizontal uncertainty (meter) 690
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 110
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) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 0.38131
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:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 71693531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-22 06:45:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HHZ. 2019-08-22T04:17:07.72 0.6 undecidable manual S 111 0.3813 50 -0.25 46
IV.RM33.EHE. 2019-08-22T04:17:04.25 0.3 undecidable manual S 164 0.259 108 -0.09 74
IV.MMO1.EHZ. 2019-08-22T04:17:02.39 0.6 undecidable manual S 47 0.2077 112 -0.08 50
IV.SMA1.EHZ. 2019-08-22T04:17:02.75 0.6 undecidable manual S 129 0.2041 112 0.39 47
IV.TERO.HHZ. 2019-08-22T04:17:02.38 1.0 undecidable manual P 111 0.3813 50 0.38 23
IV.LNSS.HHZ. 2019-08-22T04:17:01.19 0.6 undecidable manual S 200 0.1655 117 0.18 49
IV.RM33.EHE. 2019-08-22T04:17:00.20 0.1 undecidable manual P 164 0.259 108 0.3 94
IV.GAVE.EHZ. 2019-08-22T04:17:00.99 0.6 undecidable manual S 248 0.1772 116 -0.42 47
IV.LNSS.HHZ. 2019-08-22T04:16:58.17 1.0 undecidable manual P 200 0.1655 117 0.19 25
IV.SMA1.EHZ. 2019-08-22T04:16:58.28 0.1 undecidable manual P 129 0.2041 112 -0.47 92
IV.GAVE.EHZ. 2019-08-22T04:16:58.23 0.6 undecidable manual P 248 0.1772 116 0.02 51
IV.NRCA.HHZ. 2019-08-22T04:16:58.22 0.6 undecidable manual S 358 0.0746 138 0.03 52
IV.MMO1.EHZ. 2019-08-22T04:16:58.76 0.6 undecidable manual P 47 0.2077 112 -0.06 50
IV.NRCA.HHZ. 2019-08-22T04:16:56.53 0.1 negative manual P 358 0.0746 138 0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.1 0.00017642905 0.08 AML other m 2019-08-22T04:16:58.46
IV.NRCA.HHN. ML:1.2 0.00020719335 0.08 AML other m 2019-08-22T04:16:58.34
IV.NRCA.HNE. ML:1 0.0001622473 0.08 AML other m 2019-08-22T04:16:58.46
IV.NRCA.HNN. ML:1.1 0.000174353555 0.1696 AML other m 2019-08-22T04:16:58.34
IV.LNSS.HHE. ML:0.6 3.2276615E-5 0.0992 AML other m 2019-08-22T04:17:01.68
IV.LNSS.HHN. ML:0.6 2.919763E-5 0.1376 AML other m 2019-08-22T04:17:01.95
IV.GAVE.EHE. ML:0.7 3.971036E-5 0.3776 AML other m 2019-08-22T04:17:01.45
IV.GAVE.EHN. ML:0.6 3.10878175E-5 0.0992 AML other m 2019-08-22T04:17:01.68
IV.TERO.HHN. ML:0.2 6.504437E-6 0.0608 AML other m 2019-08-22T04:17:08.59
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download