Earthquake with magnitude of ML 1.0 on date 21-03-2019 and time 00:30:34 (Italy) in region 7 km E Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 7 km E Norcia (PG), on

  • 20-03-2019 23:30:34 (UTC)
  • 21-03-2019 00:30:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.18 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 7 4957 4957
Arquata del Tronto AP 10 1178 6135
Castelsantangelo sul Nera MC 11 281 6416
Accumoli RI 13 667 7083
Montegallo AP 14 523 7606
Preci PG 15 724 8330
Cascia PG 16 3217 11547
Visso MC 17 1107 12654
Ussita MC 17 444 13098
Montemonaco AP 17 604 13702
Acquasanta Terme AP 19 2916 16618
Cittareale RI 20 482 17100

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
46 Km W of Teramo (54892 inhabitants)
51 Km NE of Terni (111501 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
73 Km E of Perugia (166134 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
93 Km W of Pescara (121014 inhabitants)
95 Km NW of Chieti (51815 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km E of Viterbo (67173 inhabitants)
98 Km NE of Tivoli (56533 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 1.0 2019-03-20
23:30:34
42.8 13.18 11 2019-03-20
23:37:05
Sala Sismica INGV-Roma 66739711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-20 23:30:34 ± 0.04
Latitude 42.80 ± 0.00
Longitude 13.18 ± 0.00
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 66739711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 380
Semi-minor axis of confidence ellipse (meter) 320
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 330
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
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) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.05936
Epicentral distance of station farthest from the epicenter (degree) 0.29048
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 66739711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-20 23:37:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HHZ. 2019-03-20T23:30:45.21 0.6 undecidable manual S 316 0.2878 90 -0.04 48
IV.RM33.EHZ. 2019-03-20T23:30:45.42 0.3 undecidable manual S 175 0.2905 90 0.1 72
IV.LNSS.HHE. 2019-03-20T23:30:43.35 0.3 undecidable manual S 208 0.2203 90 0.11 73
IV.FDMO.HHZ. 2019-03-20T23:30:43.98 0.6 undecidable manual S 344 0.2473 90 -0.06 48
IV.SMA1.EHZ. 2019-03-20T23:30:42.75 0.6 undecidable manual S 146 0.2032 90 0.01 49
IV.MMO1.EHZ. 2019-03-20T23:30:41.15 0.6 undecidable manual S 47 0.1484 90 0.05 49
IV.MTRA.EHZ. 2019-03-20T23:30:41.57 0.6 undecidable manual S 105 0.1646 90 -0.03 49
IV.MF5.EHE. 2019-03-20T23:30:40.81 0.6 undecidable manual P 47 0.2797 90 0.35 45
IV.CESI.HHZ. 2019-03-20T23:30:40.42 0.1 undecidable manual P 316 0.2878 90 -0.18 94
IV.RM33.EHZ. 2019-03-20T23:30:40.93 0.3 undecidable manual P 175 0.2905 90 0.29 69
IV.FDMO.HHZ. 2019-03-20T23:30:39.74 0.1 undecidable manual P 344 0.2473 90 -0.16 95
IV.SMA1.EHZ. 2019-03-20T23:30:39.07 0.1 undecidable manual P 146 0.2032 90 -0.08 96
IV.LNSS.HHE. 2019-03-20T23:30:39.23 0.6 undecidable manual P 208 0.2203 90 -0.22 47
IV.MMO1.EHZ. 2019-03-20T23:30:38.19 0.1 positive manual P 47 0.1484 90 -0.02 99
IV.MTRA.EHZ. 2019-03-20T23:30:38.43 0.6 undecidable manual P 105 0.1646 90 -0.07 49
IV.NRCA.HHZ. 2019-03-20T23:30:38.56 0.6 undecidable manual S 307 0.0594 139 -0.16 49
IV.T1299.EHE. 2019-03-20T23:30:38.88 0.3 undecidable manual P 155 0.1808 90 0.11 73
IV.NRCA.HHZ. 2019-03-20T23:30:36.86 0.1 undecidable manual P 307 0.0594 139 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.2 0.00021048435 0.0768 AML other m 2019-03-20T23:30:38.59
IV.NRCA.HHN. ML:1.3 0.0002836632 0.064 AML other m 2019-03-20T23:30:38.59
IV.NRCA.HNE. ML:1.2 0.0002186182 0.0768 AML other m 2019-03-20T23:30:38.73
IV.NRCA.HNN. ML:1.3 0.00026707525 0.1152 AML other m 2019-03-20T23:30:40.00
IV.MTRA.EHE. ML:0.9 6.326427E-5 0.192 AML other m 2019-03-20T23:30:43.49
IV.MTRA.EHN. ML:0.9 6.553781E-5 0.2432 AML other m 2019-03-20T23:30:43.21
IV.MTRA.HNN. ML:1.3 0.000167253 0.4992 AML other m 2019-03-20T23:30:44.56
IV.SMA1.EHE. ML:0.8 4.171241E-5 0.0768 AML other m 2019-03-20T23:30:42.85
IV.SMA1.EHN. ML:0.8 3.8515812E-5 0.1024 AML other m 2019-03-20T23:30:42.94
IV.FDMO.HHE. ML:0.5 1.39733105E-5 0.256 AML other m 2019-03-20T23:30:46.16
IV.CESI.HHE. ML:0.9 3.3194551E-5 0.2048 AML other m 2019-03-20T23:30:45.81
IV.CESI.HHN. ML:0.8 2.647306E-5 0.128 AML other m 2019-03-20T23:30:45.70
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