ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.2 on date 23-03-2019 and time 22:23:01 (Italy) in region 3 km S Arquata del Tronto (AP)

A magnitude ML 1.2 earthquake occured in region: 3 km S Arquata del Tronto (AP), on

  • 23-03-2019 21:23:01 (UTC)
  • 23-03-2019 22:23:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.75, 13.3 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
Arquata del Tronto AP 3 1178 1178
Accumoli RI 7 667 1845
Acquasanta Terme AP 9 2916 4761
Montegallo AP 11 523 5284
Amatrice RI 13 2657 7941
Valle Castellana TE 16 977 8918
Montemonaco AP 17 604 9522
Norcia PG 18 4957 14479
Cittareale RI 18 482 14961
Roccafluvione AP 19 2010 16971
Rocca Santa Maria TE 20 537 17508

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km W of Teramo (54892 inhabitants)
45 Km N of L'Aquila (69753 inhabitants)
54 Km E of Foligno (57155 inhabitants)
57 Km E of Terni (111501 inhabitants)
74 Km W of Montesilvano (53738 inhabitants)
81 Km W of Pescara (121014 inhabitants)
84 Km NW of Chieti (51815 inhabitants)
84 Km E of Perugia (166134 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
98 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 1.2 2019-03-23
21:23:01
42.75 13.3 11 2019-03-23
21:27:00
Sala Sismica INGV-Roma 66847341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-23 21:23:01 ± 0.05
Latitude 42.75 ± 0.00
Longitude 13.30 ± 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 66847341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 365
Semi-minor axis of confidence ellipse (meter) 298
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 45
Circular confidence region, given by single value of horizontal uncertainty (meter) 360
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.07105
Epicentral distance of station farthest from the epicenter (degree) 0.38761
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 66847341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-23 21:27:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HHZ. 2019-03-23T21:23:15.84 0.6 undecidable manual S 312 0.3876 50 0.21 46
IV.TERO.HHZ. 2019-03-23T21:23:11.43 0.6 undecidable manual S 119 0.2554 50 -0.3 46
IV.RM33.EHZ. 2019-03-23T21:23:11.56 0.6 undecidable manual S 195 0.2473 50 0.08 49
IV.LNSS.HHZ. 2019-03-23T21:23:11.37 0.6 undecidable manual S 233 0.2401 50 0.09 49
IV.CESI.HHZ. 2019-03-23T21:23:09.53 1.0 undecidable manual P 312 0.3876 50 -0.19 23
IV.MC2.EHZ. 2019-03-23T21:23:09.56 0.6 undecidable manual S 333 0.1826 50 0 50
IV.MMO1.EHZ. 2019-03-23T21:23:08.46 0.6 undecidable manual S 7 0.152 123 -0.17 49
IV.NRCA.HHZ. 2019-03-23T21:23:08.65 0.6 undecidable manual S 302 0.161 121 -0.27 47
IV.GIGS.HHZ. 2019-03-23T21:23:08.94 1.0 negative manual P 146 0.3561 50 -0.26 23
IV.CSP1.EHZ. 2019-03-23T21:23:08.94 0.6 positive manual P 348 0.3507 50 -0.16 47
IV.LNSS.HHZ. 2019-03-23T21:23:07.29 0.3 negative manual P 233 0.2401 50 0.08 73
IV.MF5.EHZ. 2019-03-23T21:23:07.91 0.1 positive manual P 26 0.2662 50 0.25 93
IV.TERO.HHZ. 2019-03-23T21:23:07.32 0.1 positive manual P 119 0.2554 50 -0.15 96
IV.RM33.EHZ. 2019-03-23T21:23:07.36 0.6 positive manual P 195 0.2473 50 0.03 49
IV.MC2.EHZ. 2019-03-23T21:23:06.27 0.6 positive manual P 333 0.1826 50 0.05 49
IV.MTRA.HNZ. 2019-03-23T21:23:06.48 0.6 undecidable manual S 83 0.071 144 0.16 49
IV.MMO1.EHZ. 2019-03-23T21:23:05.66 0.1 undecidable manual P 7 0.152 123 -0.03 100
IV.NRCA.HHZ. 2019-03-23T21:23:05.76 0.6 undecidable manual P 302 0.161 121 -0.09 49
IV.MTRA.HNZ. 2019-03-23T21:23:04.61 0.3 undecidable manual P 83 0.071 144 0.26 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.2 0.0002025 0.4 AML other m 2019-03-23T21:23:06.73
IV.MTRA.EHN. ML:1.1 0.0001795 0.44 AML other m 2019-03-23T21:23:06.52
IV.NRCA.HHE. ML:1.3 0.0001455 1.78 AML other m 2019-03-23T21:23:09.09
IV.NRCA.HHN. ML:1.2 0.0001135 0.16 AML other m 2019-03-23T21:23:09.15
IV.LNSS.HHE. ML:1 6.06E-5 0.64 AML other m 2019-03-23T21:23:11.65
IV.TERO.HHN. ML:0.8 3.105E-5 0.06 AML other m 2019-03-23T21:23:11.80
IV.LNSS.HHN. ML:1.3 0.0001019 1.16 AML other m 2019-03-23T21:23:12.09
IV.TERO.HHE. ML:0.9 3.89E-5 1.12 AML other m 2019-03-23T21:23:12.69
IV.CSP1.EHN. ML:1.9 0.0002575 0.42 AML other m 2019-03-23T21:23:28.43
IV.CSP1.EHE. ML:1.9 0.0002925 0.42 AML other m 2019-03-23T21:23:28.64
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