Earthquake with magnitude of Md 1.1 on date 31-05-2020 and time 19:44:43 (Italy) in region 4 km SW Arquata del Tronto (AP)

A magnitude Md 1.1 earthquake occured in region: 4 km SW Arquata del Tronto (AP), on

  • 31-05-2020 17:44:43 (UTC)
  • 31-05-2020 19:44:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.74, 13.28 at 13 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 4 1178 1178
Accumoli RI 6 667 1845
Acquasanta Terme AP 11 2916 4761
Montegallo AP 12 523 5284
Amatrice RI 13 2657 7941
Norcia PG 16 4957 12898
Cittareale RI 17 482 13380
Montemonaco AP 18 604 13984
Valle Castellana TE 18 977 14961
Castelsantangelo sul Nera MC 20 281 15242

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km W of Teramo (54892 inhabitants)
45 Km N of L'Aquila (69753 inhabitants)
52 Km E of Foligno (57155 inhabitants)
55 Km E of Terni (111501 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
83 Km W of Pescara (121014 inhabitants)
83 Km E of Perugia (166134 inhabitants)
85 Km NW of Chieti (51815 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km NE of Tivoli (56533 inhabitants)
99 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
Reviewed
Rev100
Md 1.1 2020-05-31
17:44:43
42.74 13.28 13 2020-05-31
17:52:42
Sala Sismica INGV-Roma 79758331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-31 17:44:43 ± 0.05
Latitude 42.74 ± 0.00
Longitude 13.28 ± 0.00
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 79758331

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 359
Semi-minor axis of confidence ellipse (meter) 108
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 251
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) 76
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.37772
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 13
Magnitude information

Md:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 13
Type of magnitude Md
Reference to an origin 79758331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-31 17:52:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HNE. 2020-05-31T17:44:57.24 0.3 undecidable manual S 314 0.3777 94 0.08 71
IV.CSP1.EHN. 2020-05-31T17:44:56.80 0.3 undecidable manual S 352 0.3525 94 0.38 67
IV.FDMO.HHZ. 2020-05-31T17:44:55.57 0.1 undecidable manual S 335 0.3247 94 -0.01 95
IV.RM33.EHE. 2020-05-31T17:44:53.03 0.1 undecidable manual S 191 0.2383 97 0 96
IV.TERO.HHZ. 2020-05-31T17:44:53.80 0.1 undecidable manual S 116 0.2689 96 -0.14 93
IV.LNSS.HNZ. 2020-05-31T17:44:52.48 0.1 undecidable manual S 231 0.223 99 -0.1 95
IV.CAMP.HHE. 2020-05-31T17:44:52.51 0.3 undecidable manual S 155 0.2284 98 -0.25 68
IV.MC2.EHZ. 2020-05-31T17:44:51.51 0.1 undecidable manual S 339 0.1808 103 0.16 97
IV.CESI.HNE. 2020-05-31T17:44:51.44 0.3 undecidable manual P 314 0.3777 94 0.06 71
IV.NRCA.HHN. 2020-05-31T17:44:50.07 0.1 undecidable manual S 307 0.1493 110 -0.4 91
IV.CSP1.EHN. 2020-05-31T17:44:50.89 0.1 undecidable manual P 352 0.3525 94 -0.06 94
IV.MMO1.EHZ. 2020-05-31T17:44:50.73 0.1 undecidable manual S 13 0.161 107 -0.06 97
IV.FDMO.HHZ. 2020-05-31T17:44:50.31 0.1 undecidable manual P 335 0.3247 94 -0.17 92
IV.RM33.EHE. 2020-05-31T17:44:49.35 0.3 undecidable manual P 191 0.2383 97 0.35 69
IV.CAMP.HHE. 2020-05-31T17:44:49.03 0.3 undecidable manual P 155 0.2284 98 0.19 72
IV.TERO.HHZ. 2020-05-31T17:44:49.46 0.3 undecidable manual P 116 0.2689 96 -0.06 71
IV.SMA1.EHZ. 2020-05-31T17:44:49.44 0.1 undecidable manual S 159 0.1205 119 -0.24 93
IV.T1299.EHZ. 2020-05-31T17:44:49.54 0.1 undecidable manual S 178 0.1088 123 0.16 99
IV.MC2.EHZ. 2020-05-31T17:44:48.05 0.1 undecidable manual P 339 0.1808 103 0.02 99
IV.MTRA.EHZ. 2020-05-31T17:44:48.81 0.1 undecidable manual S 81 0.089 131 -0.12 96
IV.LNSS.HNZ. 2020-05-31T17:44:48.68 0.1 undecidable manual P 231 0.223 99 -0.06 96
IV.LRP.EHZ. 2020-05-31T17:44:47.30 3.0 positive manual P -0.65 0
IV.T1299.EHZ. 2020-05-31T17:44:47.14 0.1 undecidable manual P 178 0.1088 123 0.25 97
IV.NRCA.HHN. 2020-05-31T17:44:47.45 0.1 undecidable manual P 307 0.1493 110 -0.07 97
IV.MMO1.EHZ. 2020-05-31T17:44:47.78 0.1 undecidable manual P 13 0.161 107 0.07 99
IV.SMA1.EHZ. 2020-05-31T17:44:47.16 0.1 undecidable manual P 159 0.1205 119 0.1 100
IV.MTRA.EHZ. 2020-05-31T17:44:46.78 0.1 undecidable manual P 81 0.089 131 0.15 99
IV.ROSPO.HHZ. 2020-05-31T17:44:42.51 3.0 undecidable manual S 0.37 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHZ. Md:0.5 4 END duration s
IV.SMA1.EHZ. Md:0.5 4 END duration s
IV.MMO1.EHZ. Md:1 7 END duration s
IV.MC2.EHZ. Md:1.1 8 END duration s
IV.TERO.HHZ. Md:1.3 10 END duration s
IV.FDMO.HHZ. Md:1.4 10 END duration s
IV.LNSS.HNZ. Md:1.1 8 END duration s
IV.RM33.EHE. Md:1 6 END duration s
IV.T1299.EHZ. Md:0.7 5 END duration s
IV.NRCA.HHN. Md:0.7 5 END duration s
IV.CESI.HNE. Md:1.3 9 END duration s
IV.CAMP.HHE. Md:1.1 8 END duration s
IV.CSP1.EHN. Md:1.4 10 END duration s
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