Earthquake with magnitude of ML 1.1 on date 18-01-2021 and time 09:00:11 (Italy) in region 9 km W Arquata del Tronto (AP)

A magnitude ML 1.1 earthquake occured in region: 9 km W Arquata del Tronto (AP), on

  • 18-01-2021 08:00:11 (UTC)
  • 18-01-2021 09:00:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.81, 13.2 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 9 1178 1178
Norcia PG 9 4957 6135
Castelsantangelo sul Nera MC 10 281 6416
Montegallo AP 11 523 6939
Accumoli RI 13 667 7606
Montemonaco AP 14 604 8210
Preci PG 16 724 8934
Ussita MC 16 444 9378
Visso MC 16 1107 10485
Acquasanta Terme AP 17 2916 13401
Cascia PG 19 3217 16618
Montefortino FM 19 1178 17796

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km E of Foligno (57155 inhabitants)
44 Km W of Teramo (54892 inhabitants)
53 Km NE of Terni (111501 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
74 Km E of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
91 Km W of Pescara (121014 inhabitants)
93 Km S of Ancona (100861 inhabitants)
94 Km NW of Chieti (51815 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
100 Km NE of Tivoli (56533 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
Reviewed
Rev100
ML 1.1 2021-01-18
08:00:11
42.81 13.2 11 2021-01-18
08:09:53
Sala Sismica INGV-Roma 86349811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-18 08:00:11 ± 0.04
Latitude 42.81 ± 0.00
Longitude 13.20 ± 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 86349811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 295
Semi-minor axis of confidence ellipse (meter) 226
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 26
Circular confidence region, given by single value of horizontal uncertainty (meter) 290
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.07015
Epicentral distance of station farthest from the epicenter (degree) 0.34804
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:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 86349811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-18 08:09:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HHZ. 2021-01-18T08:00:24.76 0.6 undecidable manual S 122 0.348 50 -0.05 48
IV.CESI.HHZ. 2021-01-18T08:00:22.99 0.6 undecidable manual S 312 0.2932 50 -0.18 47
IV.LNSS.HHZ. 2021-01-18T08:00:21.68 0.3 undecidable manual S 210 0.2401 50 0.08 73
IV.TERO.HHZ. 2021-01-18T08:00:19.43 0.6 undecidable manual P 122 0.348 50 0.04 48
IV.CESI.HHZ. 2021-01-18T08:00:18.35 0.1 positive manual P 312 0.2932 50 -0.09 96
IV.CSP1.EHZ. 2021-01-18T08:00:18.26 0.6 negative manual P 0 0.2815 50 0.02 49
IV.CAMP.HHE. 2021-01-18T08:00:18.70 1.0 undecidable manual P 151 0.313 50 -0.09 24
IV.MF5.EHZ. 2021-01-18T08:00:18.26 1.0 undecidable manual P 46 0.2581 50 0.42 23
IV.MMO1.HNZ. 2021-01-18T08:00:18.08 0.6 undecidable manual S 45 0.1268 128 -0.06 50
IV.MTRA.EHZ. 2021-01-18T08:00:18.69 0.6 undecidable manual S 111 0.1511 123 -0.23 48
IV.LNSS.HHZ. 2021-01-18T08:00:17.60 0.3 negative manual P 210 0.2401 50 0.06 73
IV.FDMO.HHZ. 2021-01-18T08:00:17.39 1.0 undecidable manual P 339 0.2419 50 -0.17 24
IV.MC2.EHZ. 2021-01-18T08:00:17.62 0.6 undecidable manual S 354 0.1016 134 0.2 49
IV.MTRA.EHZ. 2021-01-18T08:00:16.01 0.3 undecidable manual P 111 0.1511 123 0.02 75
IV.NRCA.HHZ. 2021-01-18T08:00:16.50 0.1 undecidable manual S 289 0.0701 145 -0.12 100
IV.MC2.EHZ. 2021-01-18T08:00:15.33 1.0 undecidable manual P 354 0.1016 134 0.21 24
IV.MMO1.HNZ. 2021-01-18T08:00:15.62 1.0 undecidable manual P 45 0.1268 128 0.08 25
IV.NRCA.HHZ. 2021-01-18T08:00:14.76 0.1 positive manual P 289 0.0701 145 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.6 0.00058391975 0.096 AML other m 2021-01-18T08:00:16.60
IV.NRCA.HNE. ML:2 0.00121829755 0.1344 AML other m 2021-01-18T08:00:16.62
IV.NRCA.HHE. ML:2 0.00126747205 0.1408 AML other m 2021-01-18T08:00:16.61
IV.NRCA.HNN. ML:1.6 0.00049508945 0.096 AML other m 2021-01-18T08:00:16.57
IV.MTRA.EHE. ML:0.8 5.7066355E-5 0.2176 AML other m 2021-01-18T08:00:20.32
IV.MTRA.EHN. ML:0.8 5.5494705E-5 0.1024 AML other m 2021-01-18T08:00:20.24
IV.MTRA.HNE. ML:1.1 0.000102845075 0.2432 AML other m 2021-01-18T08:00:20.31
IV.MTRA.HNN. ML:1 7.742368E-5 0.3392 AML other m 2021-01-18T08:00:22.03
IV.LNSS.HHE. ML:0.9 3.861103E-5 0.1024 AML other m 2021-01-18T08:00:22.34
IV.LNSS.HHN. ML:1 4.853004E-5 0.3648 AML other m 2021-01-18T08:00:21.97
IV.LNSS.HNN. ML:1.3 0.000122300555 0.7104 AML other m 2021-01-18T08:00:31.67
IV.MF5.EHN. ML:1.6 0.0002113021 2.1568 AML other m 2021-01-18T08:00:20.34
IV.CESI.HHE. ML:0.9 3.2519575E-5 0.1792 AML other m 2021-01-18T08:00:23.35
IV.CESI.HHN. ML:1.2 6.664666E-5 0.16 AML other m 2021-01-18T08:00:23.58
IV.CESI.HNE. ML:1.5 0.00014878365 1.0944 AML other m 2021-01-18T08:00:30.26
IV.CESI.HNN. ML:1.4 0.000112688845 0.7552 AML other m 2021-01-18T08:00:26.12
IV.TERO.HHE. ML:0.8 2.5567645E-5 0.0832 AML other m 2021-01-18T08:00:25.16
IV.TERO.HHN. ML:1.2 5.3586215E-5 1.1392 AML other m 2021-01-18T08:00:32.00
IV.TERO.HNE. ML:1.4 8.695454E-5 0.5696 AML other m 2021-01-18T08:00:30.98
IV.TERO.HNN. ML:2 0.0003157734 0.6144 AML other m 2021-01-18T08:00:23.47
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