Earthquake with magnitude of ML 1.1 on date 12-08-2020 and time 23:30:01 (UTC) in region 7 km SE Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 7 km SE Norcia (PG), on

  • 12-08-2020 23:30:01 (UTC)
  • 13-08-2020 01:30:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.75, 13.17 at 10 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 7 4957 4957
Accumoli RI 9 667 5624
Arquata del Tronto AP 11 1178 6802
Cascia PG 13 3217 10019
Cittareale RI 15 482 10501
Castelsantangelo sul Nera MC 16 281 10782
Montegallo AP 17 523 11305
Amatrice RI 17 2657 13962
Preci PG 17 724 14686
Poggiodomo PG 19 117 14803

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km SE of Foligno (57155 inhabitants)
45 Km W of Teramo (54892 inhabitants)
47 Km E of Terni (111501 inhabitants)
49 Km NW of L'Aquila (69753 inhabitants)
75 Km SE of Perugia (166134 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km W of Pescara (121014 inhabitants)
93 Km NE of Tivoli (56533 inhabitants)
93 Km W of Chieti (51815 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 1.1 2020-08-12
23:30:01
42.75 13.17 10 2020-08-12
23:34:05
Sala Sismica INGV-Roma 81922991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-12 23:30:01 ± 0.08
Latitude 42.75 ± 0.00
Longitude 13.17 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81922991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 436
Semi-minor axis of confidence ellipse (meter) 326
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 71
Circular confidence region, given by single value of horizontal uncertainty (meter) 440
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.34714
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 24
Type of magnitude ML
Reference to an origin 81922991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-12 23:34:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HHZ. 2020-08-12T23:30:14.16 0.6 undecidable manual S 112 0.3471 50 -0.68 42
IV.MF5.EHZ. 2020-08-12T23:30:14.57 0.6 undecidable manual S 42 0.3184 50 0.59 44
IV.ARRO.EHZ. 2020-08-12T23:30:14.50 0.6 undecidable manual S 240 0.3417 50 -0.18 48
IV.RM33.EHZ. 2020-08-12T23:30:11.81 0.6 undecidable manual S 172 0.2464 109 -0.04 50
IV.MNTT.EHZ. 2020-08-12T23:30:10.65 3.0 undecidable manual P -0.36 0
IV.MF5.EHZ. 2020-08-12T23:30:09.08 0.6 negative manual P 42 0.3184 50 0.25 48
IV.SMA1.EHZ. 2020-08-12T23:30:09.54 0.6 undecidable manual S 135 0.1745 117 0.25 49
IV.ARRO.EHZ. 2020-08-12T23:30:09.20 1.0 negative manual P 240 0.3417 50 -0.02 25
IV.TERO.HHZ. 2020-08-12T23:30:09.30 0.6 undecidable manual P 112 0.3471 50 -0.02 50
IV.MTRA.EHZ. 2020-08-12T23:30:09.01 0.6 undecidable manual S 89 0.1691 117 -0.1 51
IV.MMO1.EHZ. 2020-08-12T23:30:09.47 0.6 undecidable manual S 39 0.188 115 -0.28 49
IV.MC2.EHZ. 2020-08-12T23:30:08.74 0.6 undecidable manual S 6 0.1592 119 -0.03 51
IV.RM33.EHZ. 2020-08-12T23:30:07.90 1.0 undecidable manual P 172 0.2464 109 0.3 24
IV.MTRA.EHZ. 2020-08-12T23:30:06.10 0.6 undecidable manual P 89 0.1691 117 0.09 51
IV.NRCA.HHZ. 2020-08-12T23:30:06.45 0.6 undecidable manual S 335 0.089 134 -0.12 51
IV.MMO1.EHZ. 2020-08-12T23:30:06.24 0.1 undecidable manual P 39 0.188 115 -0.14 100
IV.SMA1.EHZ. 2020-08-12T23:30:06.33 0.6 negative manual P 135 0.1745 117 0.21 49
IV.MC2.EHZ. 2020-08-12T23:30:05.96 1.0 undecidable manual P 6 0.1592 119 0.15 25
IV.NRCA.HHZ. 2020-08-12T23:30:04.66 0.6 undecidable manual P 335 0.089 134 0.11 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:1.4 0.0003573024 0.0768 AML other m 2020-08-12T23:30:06.50
IV.NRCA.HHN. ML:1.5 0.00042159955 0.0768 AML other m 2020-08-12T23:30:06.50
IV.NRCA.HHE. ML:1.4 0.00035060655 0.0512 AML other m 2020-08-12T23:30:06.51
IV.NRCA.HNE. ML:1.4 0.00034052495 0.0768 AML other m 2020-08-12T23:30:06.50
IV.MTRA.EHE. ML:0.9 6.585083E-5 0.3072 AML other m 2020-08-12T23:30:09.80
IV.MTRA.EHN. ML:0.8 5.6481555E-5 0.32 AML other m 2020-08-12T23:30:09.91
IV.MTRA.HNE. ML:1.2 0.00014150365 0.96 AML other m 2020-08-12T23:30:08.29
IV.MTRA.HNN. ML:1.2 0.000122708095 0.8832 AML other m 2020-08-12T23:30:07.30
IV.SMA1.EHE. ML:0.5 2.415147E-5 0.576 AML other m 2020-08-12T23:30:14.80
IV.SMA1.EHN. ML:0.5 2.3030035E-5 0.1152 AML other m 2020-08-12T23:30:10.71
IV.RM33.EHN. ML:0.4 1.5337695E-5 0.2432 AML other m 2020-08-12T23:30:13.04
IV.RM33.HNN. ML:1.4 0.00012603975 1.6512 AML other m 2020-08-12T23:30:11.06
IV.RM33.EHE. ML:0.4 1.46877215E-5 0.128 AML other m 2020-08-12T23:30:12.71
IV.RM33.HNE. ML:1.4 0.00011774894 0.8576 AML other m 2020-08-12T23:30:15.73
IV.MF5.EHE. ML:1.3 8.6858565E-5 15.104 AML other m 2020-08-12T23:30:15.63
IV.MF5.EHN. ML:1 4.74886439E-5 15.9616 AML other m 2020-08-12T23:30:27.44
IV.ARRO.EHE. ML:0.4 8.4798415E-6 0.1792 AML other m 2020-08-12T23:30:16.80
IV.ARRO.EHN. ML:0.4 9.9670085E-6 0.1408 AML other m 2020-08-12T23:30:16.11
IV.TERO.HNN. ML:1.6 0.0001602239 1.2928 AML other m 2020-08-12T23:30:25.84
IV.TERO.HHE. ML:0.7 1.9984275E-5 0.128 AML other m 2020-08-12T23:30:14.90
IV.TERO.HNE. ML:1.6 0.0001391373 1.1776 AML other m 2020-08-12T23:30:17.52
IV.TERO.HHN. ML:0.7 1.974385E-5 0.1664 AML other m 2020-08-12T23:30:15.30
IV.MNTT.EHE. ML:1.2 4.661443E-5 7.6416 AML other m 2020-08-12T23:30:18.97
IV.MNTT.EHN. ML:1.3 5.369673E-5 10.2528 AML other m 2020-08-12T23:30:12.68
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