Earthquake with magnitude of ML 1.3 on date 18-10-2021 and time 13:03:38 (UTC) in region 2 km NE Amatrice (RI)

A magnitude ML 1.3 earthquake occured in region: 2 km NE Amatrice (RI), on

  • 18-10-2021 13:03:38 (UTC)
  • 18-10-2021 15:03:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.645, 13.297 at 12 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
Amatrice RI 2 2657 2657
Accumoli RI 7 667 3324
Campotosto AQ 11 542 3866
Cittareale RI 12 482 4348
Capitignano AQ 14 665 5013
Montereale AQ 14 2581 7594
Arquata del Tronto AP 14 1178 8772
Acquasanta Terme AP 17 2916 11688
Cortino TE 18 656 12344
Crognaleto TE 18 1297 13641
Valle Castellana TE 19 977 14618
Rocca Santa Maria TE 20 537 15155
Borbona RI 20 617 15772

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km W of Teramo (54892 inhabitants)
34 Km N of L'Aquila (69753 inhabitants)
54 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
71 Km W of Montesilvano (53738 inhabitants)
78 Km W of Pescara (121014 inhabitants)
79 Km W of Chieti (51815 inhabitants)
86 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
90 Km SE of Perugia (166134 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 1.3 2021-10-18
13:03:38
42.645 13.2968 12 2021-10-18
13:21:43
Sala Sismica INGV-Roma 96727131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-18 13:03:38 ± 0.09
Latitude 42.6450 ± 0.0054
Longitude 13.2968 ± 0.0061
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96727131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 609
Semi-minor axis of confidence ellipse (meter) 225
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 206
Circular confidence region, given by single value of horizontal uncertainty (meter) 610
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.36243
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 96727131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-18 13:21:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MF5.EHZ. 2021-10-18T13:03:52.73 0.3 undecidable manual S 19 0.3624 92 0.93 55
IV.GAVE.EHZ. 2021-10-18T13:03:49.76 0.3 undecidable manual S 279 0.2995 92 -0.17 70
IV.GIGS.HHE. 2021-10-18T13:03:49.06 0.3 undecidable manual S 133 0.2797 92 -0.27 71
IV.TERO.HNE. 2021-10-18T13:03:47.48 0.1 undecidable manual S 96 0.2266 94 -0.29 95
IV.MF5.EHZ. 2021-10-18T13:03:47.02 0.3 undecidable manual P 19 0.3624 92 0.8 58
IV.NRCA.HHZ. 2021-10-18T13:03:47.25 0.3 undecidable manual S 325 0.2311 93 -0.65 61
IV.LNSS.HNN. 2021-10-18T13:03:46.61 0.6 undecidable manual S 258 0.1934 95 -0.17 48
IV.RM33.EHZ. 2021-10-18T13:03:45.60 0.3 undecidable manual S 204 0.1484 101 0.12 74
IV.CAMP.HHE. 2021-10-18T13:03:45.04 0.3 undecidable manual S 143 0.1367 105 -0.09 75
IV.GAVE.EHZ. 2021-10-18T13:03:45.05 0.3 undecidable manual P 279 0.2995 92 -0.09 72
IV.MC2.EHZ. 2021-10-18T13:03:45.80 3.0 negative manual P 0.82 0
IV.NRCA.HHZ. 2021-10-18T13:03:44.20 0.3 undecidable manual P 325 0.2311 93 0.23 71
IV.MTRA.EHZ. 2021-10-18T13:03:44.43 0.3 undecidable manual S 33 0.1331 106 -0.6 65
IV.GIGS.HHE. 2021-10-18T13:03:44.84 0.3 undecidable manual P 133 0.2797 92 0.05 72
IV.LNSS.HNN. 2021-10-18T13:03:43.32 0.3 undecidable manual P 258 0.1934 95 0 74
IV.TERO.HNE. 2021-10-18T13:03:43.79 0.1 undecidable manual P 96 0.2266 94 -0.1 98
IV.MTRA.EHZ. 2021-10-18T13:03:42.16 0.1 undecidable manual P 33 0.1331 106 -0.15 98
IV.RM33.EHZ. 2021-10-18T13:03:42.80 0.1 undecidable manual P 204 0.1484 101 0.23 96
IV.CAMP.HHE. 2021-10-18T13:03:42.54 0.3 undecidable manual P 143 0.1367 105 0.17 73
IV.SMA1.EHZ. 2021-10-18T13:03:42.72 0.1 undecidable manual S 117 0.0315 159 -0.09 100
IV.T1299.EHN. 2021-10-18T13:03:41.16 0.1 undecidable manual P 225 0.0153 170 0.21 100
IV.SMA1.EHZ. 2021-10-18T13:03:41.21 0.1 undecidable manual P 117 0.0315 159 0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.4 0.00037664655 0.1152 AML other m 2021-10-18T13:03:42.79
IV.SMA1.EHE. ML:1.4 0.00035378285 0.1984 AML other m 2021-10-18T13:03:43.06
IV.MTRA.EHN. ML:1.6 0.00032087965 0.2624 AML other m 2021-10-18T13:03:44.90
IV.MTRA.EHE. ML:1.4 0.00023589765 0.2368 AML other m 2021-10-18T13:03:45.40
IV.RM33.EHN. ML:1 8.2711515E-5 0.1408 AML other m 2021-10-18T13:03:45.94
IV.RM33.EHE. ML:1 8.627911E-5 0.16 AML other m 2021-10-18T13:03:46.52
IV.GAVE.EHE. ML:1.3 8.4484715E-5 0.1344 AML other m 2021-10-18T13:03:50.60
IV.GAVE.EHN. ML:1.3 7.8E-5 0.24 AML other m 2021-10-18T13:03:51.00
IV.MTRA.HNE. ML:1.5 0.00026003725 0.2368 AML other m 2021-10-18T13:03:45.40
IV.MTRA.HNN. ML:1.6 0.00033385495 0.2688 AML other m 2021-10-18T13:03:44.90
IV.MF5.EHE. ML:1.1 4.01769E-5 0.2816 AML other m 2021-10-18T13:03:53.35
IV.MF5.EHN. ML:1.1 3.854384625E-5 0.3392 AML other m 2021-10-18T13:03:53.01
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download