ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.1 on date 25-03-2019 and time 21:27:25 (Italy) in region 5 km S Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 5 km S Norcia (PG), on

  • 25-03-2019 20:27:25 (UTC)
  • 25-03-2019 21:27:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.75, 13.08 at 12 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 5 4957 4957
Cascia PG 7 3217 8174
Poggiodomo PG 13 117 8291
Preci PG 15 724 9015
Accumoli RI 15 667 9682
Cerreto di Spoleto PG 16 1075 10757
Monteleone di Spoleto PG 16 599 11356
Cittareale RI 16 482 11838
Castelsantangelo sul Nera MC 17 281 12119
Arquata del Tronto AP 18 1178 13297
Vallo di Nera PG 18 364 13661
Sellano PG 20 1079 14740
Visso MC 20 1107 15847

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SE of Foligno (57155 inhabitants)
42 Km NE of Terni (111501 inhabitants)
52 Km NW of L'Aquila (69753 inhabitants)
52 Km W of Teramo (54892 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
88 Km E of Viterbo (67173 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km N of Tivoli (56533 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
98 Km W of Pescara (121014 inhabitants)
99 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 1.1 2019-03-25
20:27:25
42.75 13.08 12 2019-03-25
20:46:05
Sala Sismica INGV-Roma 66920801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-25 20:27:25 ± 0.08
Latitude 42.75 ± 0.00
Longitude 13.08 ± 0.01
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 66920801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 532
Semi-minor axis of confidence ellipse (meter) 185
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 104
Circular confidence region, given by single value of horizontal uncertainty (meter) 530
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 129
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.2626
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 66920801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-25 20:46:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMUR.HNZ. 2019-03-25T20:27:50.25 3.0 undecidable manual S 0.53 0
IV.CPGN.EHZ. 2019-03-25T20:27:45.19 3.0 undecidable manual P -0.39 0
IV.MMUR.HNZ. 2019-03-25T20:27:38.31 3.0 negative manual P -0.23 0
IV.RM33.EHZ. 2019-03-25T20:27:35.37 0.3 undecidable manual S 159 0.2626 93 -0.21 75
IV.SMA1.EHZ. 2019-03-25T20:27:34.84 0.3 undecidable manual S 124 0.2212 95 0.48 71
IV.MMO1.EHZ. 2019-03-25T20:27:34.56 0.3 undecidable manual S 51 0.2302 94 -0.06 78
IV.MC2.EHZ. 2019-03-25T20:27:33.27 0.3 undecidable manual S 26 0.1754 98 0.25 75
IV.GAVE.HNZ. 2019-03-25T20:27:32.62 0.3 undecidable manual S 246 0.1529 102 0.27 76
IV.LNSS.HHZ. 2019-03-25T20:27:32.32 0.3 undecidable manual S 192 0.1538 102 -0.06 79
IV.RM33.EHZ. 2019-03-25T20:27:31.05 0.1 undecidable manual P 159 0.2626 93 -0.2 100
IV.MMO1.EHZ. 2019-03-25T20:27:30.51 0.3 undecidable manual P 51 0.2302 94 -0.19 76
IV.SMA1.EHZ. 2019-03-25T20:27:30.49 0.3 undecidable manual P 124 0.2212 95 -0.06 78
IV.NRCA.HHZ. 2019-03-25T20:27:30.22 0.3 undecidable manual S 15 0.0827 130 -0.27 77
IV.GAVE.HNZ. 2019-03-25T20:27:29.48 0.3 undecidable manual P 246 0.1529 102 0.09 79
IV.LNSS.HHZ. 2019-03-25T20:27:29.38 0.3 undecidable manual P 192 0.1538 102 -0.03 79
IV.MC2.EHZ. 2019-03-25T20:27:29.84 0.3 undecidable manual P 26 0.1754 98 0.07 79
IV.NRCA.HHZ. 2019-03-25T20:27:28.32 0.3 undecidable manual P 15 0.0827 130 0 81
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1 8.64E-5 0.1 AML other m 2019-03-25T20:27:32.70
IV.NRCA.HHN. ML:0.9 9.676758E-5 0.0896 AML other m 2019-03-25T20:27:30.97
IV.NRCA.HNE. ML:1.3 0.0002161409 0.1664 AML other m 2019-03-25T20:27:30.27
IV.LNSS.HHN. ML:1 7.493595E-5 0.1664 AML other m 2019-03-25T20:27:33.08
IV.RM33.EHE. ML:0.5 1.5795967E-5 0.1408 AML other m 2019-03-25T20:27:35.96
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