Earthquake with magnitude of ML 0.4 on date 12-03-2020 and time 10:18:57 (UTC) in region 6 km W Arquata del Tronto (AP)

A magnitude ML 0.4 earthquake occured in region: 6 km W Arquata del Tronto (AP), on

  • 12-03-2020 10:18:57 (UTC)
  • 12-03-2020 11:18:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.76, 13.23 at 15 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 6 1178 1178
Accumoli RI 7 667 1845
Norcia PG 12 4957 6802
Montegallo AP 13 523 7325
Acquasanta Terme AP 15 2916 10241
Amatrice RI 15 2657 12898
Castelsantangelo sul Nera MC 16 281 13179
Cittareale RI 17 482 13661
Montemonaco AP 18 604 14265
Cascia PG 18 3217 17482

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km W of Teramo (54892 inhabitants)
47 Km N of L'Aquila (69753 inhabitants)
48 Km E of Foligno (57155 inhabitants)
53 Km E of Terni (111501 inhabitants)
79 Km E of Perugia (166134 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
87 Km W of Pescara (121014 inhabitants)
89 Km NW of Chieti (51815 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km NE of Tivoli (56533 inhabitants)
98 Km S of Ancona (100861 inhabitants)
100 Km E of Viterbo (67173 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 0.4 2020-03-12
10:18:57
42.76 13.23 15 2020-03-12
10:26:06
Sala Sismica INGV-Roma 77214371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-12 10:18:57 ± 0.2
Latitude 42.76 ± 0.01
Longitude 13.23 ± 0.01
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77214371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 618
Semi-minor axis of confidence ellipse (meter) 476
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 620
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.30577
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:0.4

Field Value
Value 0.4
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 77214371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-12 10:26:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HHZ. 2020-03-12T10:19:08.76 0.3 undecidable manual S 116 0.3058 100 -0.1 72
IV.RM33.HNZ. 2020-03-12T10:19:07.38 0.3 undecidable manual S 183 0.25 104 0.13 73
IV.FDMO.HHZ. 2020-03-12T10:19:07.64 3.0 undecidable manual S -0.21 0
IV.LNSS.HNZ. 2020-03-12T10:19:05.95 0.3 undecidable manual S 222 0.2095 108 -0.15 73
IV.MC2.EHZ. 2020-03-12T10:19:05.31 0.1 undecidable manual S 349 0.1556 118 0.7 86
IV.TERO.HHZ. 2020-03-12T10:19:04.13 0.1 undecidable manual P 116 0.3058 100 0.17 96
IV.SMA1.EHZ. 2020-03-12T10:19:04.38 0.3 undecidable manual S 149 0.1493 119 -0.08 75
IV.CSP1.EHZ. 2020-03-12T10:19:04.34 3.0 positive manual P 0.51 0
IV.MMO1.EHZ. 2020-03-12T10:19:04.34 0.3 undecidable manual S 27 0.1565 118 -0.31 71
IV.NRCA.HNZ. 2020-03-12T10:19:03.14 0.3 undecidable manual S 311 0.1133 130 -0.44 70
IV.RM33.HNZ. 2020-03-12T10:19:03.09 0.1 undecidable manual P 183 0.25 104 0.06 99
IV.LNSS.HNZ. 2020-03-12T10:19:02.44 0.1 undecidable manual P 222 0.2095 108 0.08 100
IV.MMO1.EHZ. 2020-03-12T10:19:01.39 0.1 undecidable manual P 27 0.1565 118 -0.14 98
IV.SMA1.EHZ. 2020-03-12T10:19:01.47 0.6 negative manual P 149 0.1493 119 0.05 51
IV.MC2.EHZ. 2020-03-12T10:19:01.48 1.0 undecidable manual P 349 0.1556 118 -0.03 25
IV.NRCA.HNZ. 2020-03-12T10:19:00.80 0.1 undecidable manual P 311 0.1133 130 -0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.4 2.1514104E-5 0.1024 AML other m 2020-03-12T10:19:04.60
IV.SMA1.EHN. ML:0.6 2.7951785E-5 0.1792 AML other m 2020-03-12T10:19:04.52
IV.TERO.HHE. ML:0.1 7.37614E-6 0.6208 AML other m 2020-03-12T10:19:16.96
IV.TERO.HHN. ML:0.6 1.7208865E-5 0.8 AML other m 2020-03-12T10:19:15.93
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