Earthquake with magnitude of ML 1.2 on date 11-08-2020 and time 11:22:34 (UTC) in region 8 km SE Norcia (PG)

A magnitude ML 1.2 earthquake occured in region: 8 km SE Norcia (PG), on

  • 11-08-2020 11:22:34 (UTC)
  • 11-08-2020 13:22:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.76, 13.17 at 11 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 8 4957 4957
Accumoli RI 9 667 5624
Arquata del Tronto AP 10 1178 6802
Cascia PG 14 3217 10019
Castelsantangelo sul Nera MC 15 281 10300
Cittareale RI 16 482 10782
Montegallo AP 16 523 11305
Amatrice RI 17 2657 13962
Preci PG 17 724 14686
Acquasanta Terme AP 19 2916 17602

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km SE of Foligno (57155 inhabitants)
45 Km W of Teramo (54892 inhabitants)
48 Km E of Terni (111501 inhabitants)
49 Km NW of L'Aquila (69753 inhabitants)
75 Km SE of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
91 Km W of Pescara (121014 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km W of Chieti (51815 inhabitants)
94 Km NE of Tivoli (56533 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
100 Km S of Ancona (100861 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
Reviewed
Rev100
ML 1.2 2020-08-11
11:22:34
42.76 13.17 11 2020-08-11
11:29:25
Sala Sismica INGV-Roma 81877091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-11 11:22:34 ± 0.04
Latitude 42.76 ± 0.00
Longitude 13.17 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81877091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 304
Semi-minor axis of confidence ellipse (meter) 222
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 86
Circular confidence region, given by single value of horizontal uncertainty (meter) 300
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.33365
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 81877091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-11 11:29:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-08-11T11:22:55.82 3.0 undecidable manual S 0.19 0
IV.CSP1.EHZ. 2020-08-11T11:22:47.45 0.6 undecidable manual S 4 0.3336 50 0.17 47
IV.FDMO.HHZ. 2020-08-11T11:22:45.73 0.3 undecidable manual S 347 0.2851 50 -0.1 71
IV.RM33.EHZ. 2020-08-11T11:22:44.73 0.3 undecidable manual S 173 0.2509 50 -0.1 71
IV.OFFI.HHZ. 2020-08-11T11:22:44.33 3.0 negative manual P 0.42 0
IV.GAVE.EHZ. 2020-08-11T11:22:43.77 0.3 undecidable manual S 252 0.2149 50 0.01 73
IV.MMO1.EHZ. 2020-08-11T11:22:42.66 0.3 undecidable manual S 39 0.1799 50 -0.07 73
IV.LNSS.HHZ. 2020-08-11T11:22:42.86 0.3 undecidable manual S 212 0.1835 50 0.03 74
IV.CSP1.EHZ. 2020-08-11T11:22:42.05 0.3 undecidable manual P 4 0.3336 50 0 72
IV.MC2.EHZ. 2020-08-11T11:22:42.05 0.3 undecidable manual S 4 0.1529 123 0.13 73
IV.FDMO.HHZ. 2020-08-11T11:22:41.09 0.1 undecidable manual P 347 0.2851 50 -0.12 95
IV.MTRA.EHZ. 2020-08-11T11:22:41.92 0.3 undecidable manual S 91 0.1637 50 -0.32 69
IV.GAVE.EHZ. 2020-08-11T11:22:40.02 0.1 undecidable manual P 252 0.2149 50 0 98
IV.RM33.EHZ. 2020-08-11T11:22:40.54 0.1 undecidable manual P 173 0.2509 50 -0.09 95
IV.MC2.EHZ. 2020-08-11T11:22:39.03 0.1 undecidable manual P 4 0.1529 123 0.08 98
IV.NRCA.HNZ. 2020-08-11T11:22:39.77 0.3 undecidable manual S 330 0.0863 139 -0.18 73
IV.MMO1.EHZ. 2020-08-11T11:22:39.39 0.1 undecidable manual P 39 0.1799 50 -0.03 98
IV.LNSS.HHZ. 2020-08-11T11:22:39.42 0.1 undecidable manual P 212 0.1835 50 -0.05 97
IV.MTRA.EHZ. 2020-08-11T11:22:39.46 0.3 undecidable manual P 91 0.1637 50 0.32 71
IV.SMA1.EHZ. 2020-08-11T11:22:39.67 0.3 undecidable manual P 137 0.1745 50 0.35 70
IV.NRCA.HNZ. 2020-08-11T11:22:37.88 0.1 undecidable manual P 330 0.0863 139 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.7 0.000636 0.18 AML other m 2020-08-11T11:22:39.79
IV.NRCA.HHN. ML:1.7 0.000657 0.08 AML other m 2020-08-11T11:22:39.79
IV.MTRA.EHN. ML:1.1 0.00010285 0.28 AML other m 2020-08-11T11:22:42.51
IV.MTRA.EHE. ML:1.2 0.000128 0.22 AML other m 2020-08-11T11:22:43.43
IV.GAVE.EHN. ML:1.2 8.43E-5 0.32 AML other m 2020-08-11T11:22:44.17
IV.GAVE.EHE. ML:1.2 0.0001033 0.46 AML other m 2020-08-11T11:22:44.22
IV.RM33.EHE. ML:1.1 7.135E-5 0.14 AML other m 2020-08-11T11:22:45.12
IV.FDMO.HHE. ML:1 3.97E-5 0.2 AML other m 2020-08-11T11:22:46.49
IV.FDMO.HHN. ML:0.8 2.71E-5 0.52 AML other m 2020-08-11T11:22:46.60
IV.NRCA.HNE. ML:1.5 0.00041600065 0.0704 AML other m 2020-08-11T11:22:39.80
IV.NRCA.HNN. ML:1.6 0.00056505665 0.0704 AML other m 2020-08-11T11:22:39.80
IV.LNSS.HHN. ML:1.2 0.00012203775 0.1152 AML other m 2020-08-11T11:22:43.96
IV.LNSS.HHE. ML:1.2 0.0001262603 0.1024 AML other m 2020-08-11T11:22:43.25
IV.RM33.EHN. ML:0.9 4.578443E-5 0.2368 AML other m 2020-08-11T11:22:45.11
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