Istituto Nazionale di Geofisica e Vulcanologia

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) 42.7590, 13.2310 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.

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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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.4 2020-03-12
10:18:57		 42.759 13.2313 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 42.7590 ± 0.0063
Longitude 13.2313 ± 0.0073
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) 620.0
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) 0.00000
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(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2020-03-12T10:19:08.76 0.3 undecidable manual S 116 33.9438 100 -0.1 72
IV.FDMO.HHZ. 2020-03-12T10:19:07.64 3.0 undecidable manual S -0.21 0
IV.RM33.HNZ. 2020-03-12T10:19:07.38 0.3 undecidable manual S 183 27.75 104 0.13 73
IV.LNSS.HNZ. 2020-03-12T10:19:05.95 0.3 undecidable manual S 222 23.2545 108 -0.15 73
IV.MC2.EHZ. 2020-03-12T10:19:05.31 0.1 undecidable manual S 349 17.2716 118 0.7 86
IV.MMO1.EHZ. 2020-03-12T10:19:04.34 0.3 undecidable manual S 27 17.3715 118 -0.31 71
IV.TERO.HHZ. 2020-03-12T10:19:04.13 0.1 undecidable manual P 116 33.9438 100 0.17 96
IV.SMA1.EHZ. 2020-03-12T10:19:04.38 0.3 undecidable manual S 149 16.5723 119 -0.08 75
IV.CSP1.EHZ. 2020-03-12T10:19:04.34 3.0 positive manual P 0.51 0
IV.NRCA.HNZ. 2020-03-12T10:19:03.14 0.3 undecidable manual S 311 12.5763 130 -0.44 70
IV.RM33.HNZ. 2020-03-12T10:19:03.09 0.1 undecidable manual P 183 27.75 104 0.06 99
IV.LNSS.HNZ. 2020-03-12T10:19:02.44 0.1 undecidable manual P 222 23.2545 108 0.08 100
IV.SMA1.EHZ. 2020-03-12T10:19:01.47 0.6 negative manual P 149 16.5723 119 0.05 51
IV.MC2.EHZ. 2020-03-12T10:19:01.48 1.0 undecidable manual P 349 17.2716 118 -0.03 25
IV.MMO1.EHZ. 2020-03-12T10:19:01.39 0.1 undecidable manual P 27 17.3715 118 -0.14 98
IV.NRCA.HNZ. 2020-03-12T10:19:00.80 0.1 undecidable manual P 311 12.5763 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 0.000021514104 0.1024 AML other m 2020-03-12T10:19:04.60
IV.SMA1.EHN. ML:0.6 0.000027951785 0.1792 AML other m 2020-03-12T10:19:04.52
IV.TERO.HHE. ML:0.1 0.00000737614 0.6208 AML other m 2020-03-12T10:19:16.96
IV.TERO.HHN. ML:0.6 0.000017208865 0.8 AML other m 2020-03-12T10:19:15.93
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download