Earthquake with magnitude of ML 0.9 on date 18-05-2020 and time 10:57:49 (Italy) in region 7 km E Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 7 km E Norcia (PG), on

  • 18-05-2020 08:57:49 (UTC)
  • 18-05-2020 10:57:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.78, 13.18 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 7 4957 4957
Arquata del Tronto AP 10 1178 6135
Accumoli RI 11 667 6802
Castelsantangelo sul Nera MC 13 281 7083
Montegallo AP 14 523 7606
Cascia PG 15 3217 10823
Preci PG 16 724 11547
Cittareale RI 18 482 12029
Montemonaco AP 18 604 12633
Visso MC 19 1107 13740
Acquasanta Terme AP 19 2916 16656
Amatrice RI 19 2657 19313
Ussita MC 19 444 19757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km E of Foligno (57155 inhabitants)
45 Km W of Teramo (54892 inhabitants)
50 Km E of Terni (111501 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
74 Km SE of Perugia (166134 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
91 Km W of Pescara (121014 inhabitants)
94 Km NW of Chieti (51815 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
97 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
Rev 100 ML 0.9 2020-05-18
08:57:49
42.78 13.18 9 2020-05-18
09:11:17
Sala Sismica INGV-Roma 79275991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-18 08:57:49 ± 0.2
Latitude 42.78 ± 0.00
Longitude 13.18 ± 0.04
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 79275991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2969
Semi-minor axis of confidence ellipse (meter) 252
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
Circular confidence region, given by single value of horizontal uncertainty (meter) 2970
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 172
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.31296
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 79275991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-18 09:11:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.IFIL.HHZ. 2020-05-18T08:59:48.35 3.0 undecidable manual Sn 5.01 0
IV.GIB.HHZ. 2020-05-18T08:59:13.95 3.0 positive manual Pg 14.24 0
IV.IFIL.HHZ. 2020-05-18T08:59:09.10 3.0 positive manual Pg 16.02 0
IV.ENIC.HNZ. 2020-05-18T08:59:07.89 3.0 negative manual Pn 1.22 0
IV.SPS2.HHZ. 2020-05-18T08:59:00.02 3.0 negative manual Pg 8.46 0
IV.VENT.EHZ. 2020-05-18T08:58:52.37 3.0 undecidable manual Sg 6.53 0
IV.EUCT.HNZ. 2020-05-18T08:58:49.13 3.0 positive manual Pn 3.38 0
IV.AGLI.HHZ. 2020-05-18T08:58:48.67 3.0 undecidable manual Pg 8.38 0
OX.MPRI.HHZ. 2020-05-18T08:58:47.98 3.0 undecidable manual Pg 6.59 0
IT.GNV.HGZ. 2020-05-18T08:58:46.10 3.0 negative manual Pn 4.43 0
IV.RIBO.EHZ.01 2020-05-18T08:58:41.04 3.0 undecidable manual Sg 5.15 0
IV.ROSPO.HHZ. 2020-05-18T08:58:37.02 3.0 undecidable manual S 5.06 0
IV.FREG.EHZ. 2020-05-18T08:58:37.60 3.0 undecidable manual Pn -1.39 0
IV.SAMA.EHZ. 2020-05-18T08:58:23.46 3.0 undecidable manual S -0.26 0
IV.LPEL.HHZ. 2020-05-18T08:58:22.78 3.0 undecidable manual S -0.19 0
IV.CSP1.EHZ. 2020-05-18T08:58:01.87 0.3 undecidable manual S 3 0.313 50 0.23 70
IV.RM33.EHZ. 2020-05-18T08:58:00.34 0.6 undecidable manual S 175 0.2707 50 -0.04 49
IV.LNSS.HHZ. 2020-05-18T08:57:58.08 0.1 undecidable manual S 211 0.2041 112 0.05 99
IV.CSP1.EHZ. 2020-05-18T08:57:56.36 0.3 undecidable manual P 3 0.313 50 -0.16 71
IV.RM33.EHZ. 2020-05-18T08:57:55.69 1.0 undecidable manual P 175 0.2707 50 -0.1 24
IV.FDMO.HHZ. 2020-05-18T08:57:55.50 0.6 negative manual P 345 0.2662 50 -0.22 47
IV.LNSS.HHZ. 2020-05-18T08:57:54.43 0.1 undecidable manual P 211 0.2041 112 0 100
IV.NRCA.HHZ. 2020-05-18T08:57:53.57 0.6 undecidable manual S 318 0.0737 139 -0.26 49
IV.NRCA.HHZ. 2020-05-18T08:57:52.19 0.1 negative manual P 318 0.0737 139 0.18 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.7 0.000821 0.16 AML other m 2020-05-18T08:57:53.69
IV.LNSS.HHE. ML:1 6.975E-5 0.16 AML other m 2020-05-18T08:57:58.51
IV.LNSS.HHN. ML:0.9 5.495E-5 1.58 AML other m 2020-05-18T08:57:58.20
IV.NRCA.HNE. ML:1.7 0.00076601225 0.16 AML other m 2020-05-18T08:57:53.69
IV.RM33.HNN. ML:1.4 0.00013554415 0.9984 AML other m 2020-05-18T08:58:00.20
IV.RM33.EHE. ML:0.5 1.25171795E-5 0.16 AML other m 2020-05-18T08:58:01.31
IV.CSP1.EHE. ML:0.7 2.1795132E-5 1.1776 AML other m 2020-05-18T08:58:02.55
IV.CSP1.EHN. ML:0.8 2.4398092E-5 2.4 AML other m 2020-05-18T08:58:03.00
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