Earthquake with magnitude of ML 1.5 on date 21-10-2021 and time 12:12:27 (Italy) in region 1 km SW Amatrice (RI)

A magnitude ML 1.5 earthquake occured in region: 1 km SW Amatrice (RI), on

  • 21-10-2021 10:12:27 (UTC)
  • 21-10-2021 12:12:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.62, 13.282 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
Amatrice RI 1 2657 2657
Accumoli RI 9 667 3324
Cittareale RI 10 482 3806
Campotosto AQ 10 542 4348
Montereale AQ 11 2581 6929
Capitignano AQ 11 665 7594
Borbona RI 17 617 8211
Arquata del Tronto AP 17 1178 9389
Crognaleto TE 18 1297 10686
Cagnano Amiterno AQ 18 1369 12055
Posta RI 19 694 12749
Cortino TE 19 656 13405
Barete AQ 19 737 14142
Acquasanta Terme AP 20 2916 17058

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of L'Aquila (69753 inhabitants)
35 Km W of Teramo (54892 inhabitants)
52 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
72 Km W of Montesilvano (53738 inhabitants)
78 Km W of Pescara (121014 inhabitants)
79 Km W of Chieti (51815 inhabitants)
83 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
99 Km E of Viterbo (67173 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 1.5 2021-10-21
10:12:27
42.6202 13.282 13 2021-10-21
10:18:44
Sala Sismica INGV-Roma 96839601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-21 10:12:27 ± 0.06
Latitude 42.6202 ± 0.0045
Longitude 13.2820 ± 0.0037
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 96839601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 447
Semi-minor axis of confidence ellipse (meter) 69
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 187
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 77
Number of associated phases, regardless of their use for origin computation 49
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.38221
Number of stations at which the event was observed 38
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 96839601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-21 10:18:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ECTS.HHZ. 2021-10-21T10:13:35.56 3.0 undecidable manual Sg 2.35 0
MN.VSL.HHZ. 2021-10-21T10:13:30.17 3.0 undecidable manual Sn -5.57 0
IV.IMOL.HNZ. 2021-10-21T10:13:20.77 3.0 undecidable manual Sn 0.2 0
IV.SPS2.HHZ. 2021-10-21T10:13:19.47 3.0 undecidable manual Sg 5.39 0
IV.FIR.HHZ. 2021-10-21T10:13:12.10 3.0 undecidable manual Sn -1.16 0
IV.HAGA.HHZ. 2021-10-21T10:13:05.57 3.0 undecidable manual Pg 10.13 0
GU.GRAM.HHZ. 2021-10-21T10:13:05.04 3.0 positive manual Pg 13.66 0
IT.LNT.HGZ. 2021-10-21T10:12:55.09 3.0 undecidable manual Pn 0.1 0
IV.ATFO.HHZ. 2021-10-21T10:12:54.63 3.0 undecidable manual Sn 2.27 0
IV.MSSA.HHZ. 2021-10-21T10:12:50.29 3.0 undecidable manual Pn -3.3 0
IV.GIZZ.HHZ. 2021-10-21T10:12:47.23 3.0 undecidable manual Pg 8.11 0
IV.SPS2.HHZ. 2021-10-21T10:12:43.35 3.0 undecidable manual Pg 6.65 0
IV.MSAG.HHZ. 2021-10-21T10:12:41.10 3.0 undecidable manual Sn -1.35 0
IV.GAVE.EHZ. 2021-10-21T10:12:38.94 0.3 undecidable manual S 284 0.2941 97 0.02 72
IT.FIE.HGZ. 2021-10-21T10:12:38.18 3.0 positive manual Pn 1.83 0
IV.GIGS.HHN. 2021-10-21T10:12:38.24 0.6 undecidable manual S 128 0.2716 98 -0.02 48
IV.PIPA.HHZ. 2021-10-21T10:12:37.40 3.0 negative manual Pn -1.06 0
IV.OFFI.HHZ. 2021-10-21T10:12:37.76 3.0 undecidable manual S 0.31 0
IV.TERO.HHZ. 2021-10-21T10:12:36.94 0.3 undecidable manual S 89 0.2365 100 -0.3 69
IV.RIBO.EHZ.01 2021-10-21T10:12:36.62 3.0 undecidable manual Pg 6.69 0
IV.MF5.EHZ. 2021-10-21T10:12:36.58 3.0 undecidable manual S -2.43 0
IV.ARRO.EHZ. 2021-10-21T10:12:35.39 0.1 undecidable manual P 264 0.3822 95 -0.29 89
IV.LNSS.HHZ. 2021-10-21T10:12:35.59 0.3 undecidable manual S 265 0.179 107 0.03 74
IV.MC2.EHZ. 2021-10-21T10:12:35.65 3.0 undecidable manual S -2.47 0
IV.GAVE.EHZ. 2021-10-21T10:12:34.16 0.1 undecidable manual P 284 0.2941 97 -0.02 96
IV.CAMP.HHZ. 2021-10-21T10:12:34.21 0.6 undecidable manual S 132 0.1259 120 0.09 49
IV.MTRA.EHZ. 2021-10-21T10:12:34.89 0.3 undecidable manual S 32 0.1601 110 -0.16 72
IV.GIGS.HHN. 2021-10-21T10:12:33.67 0.1 undecidable manual P 128 0.2716 98 -0.13 95
IV.TERO.HHZ. 2021-10-21T10:12:33.38 0.1 undecidable manual P 89 0.2365 100 0.16 95
IV.RM33.EHZ. 2021-10-21T10:12:33.76 0.3 undecidable manual S 204 0.1214 121 -0.25 72
IV.NRCA.HHZ. 2021-10-21T10:12:33.58 3.0 undecidable manual S -3.1 0
IV.MTRA.EHZ. 2021-10-21T10:12:32.13 0.1 undecidable manual P 32 0.1601 110 0.18 96
IV.SMA1.EHZ. 2021-10-21T10:12:32.27 0.3 undecidable manual S 75 0.0405 157 -0.15 75
IV.LNSS.HHZ. 2021-10-21T10:12:32.31 0.1 undecidable manual P 265 0.179 107 0.06 98
IV.RM33.EHZ. 2021-10-21T10:12:31.50 0.1 undecidable manual P 204 0.1214 121 0.15 97
IV.T1299.HNN. 2021-10-21T10:12:31.92 0.6 undecidable manual S 1 0.0144 172 -0.28 49
IV.CAMP.HHZ. 2021-10-21T10:12:31.58 0.1 undecidable manual P 132 0.1259 120 0.17 97
IV.SCHR.EHZ. 2021-10-21T10:12:30.47 3.0 positive manual Pg 4.24 0
IV.T1299.HNN. 2021-10-21T10:12:30.39 0.1 undecidable manual P 1 0.0144 172 0.08 100
IV.SMA1.EHZ. 2021-10-21T10:12:30.70 0.1 undecidable manual P 75 0.0405 157 0.27 96
IV.MRVN.HHZ. 2021-10-21T10:12:27.74 3.0 undecidable manual Pg 5.37 0
IV.FOSV.EHZ. 2021-10-21T10:12:24.00 3.0 undecidable manual Pg 1.15 0
IV.EL6.EHZ. 2021-10-21T10:12:22.03 3.0 negative manual Pg -0.24 0
IV.ATFO.HHZ. 2021-10-21T10:12:21.96 3.0 undecidable manual Pn -2.54 0
IV.MELA.HHZ. 2021-10-21T10:12:08.44 3.0 negative manual P -2.47 0
IV.MTMR.EHZ. 2021-10-21T10:12:08.23 3.0 undecidable manual Pn -3.2 0
IV.MOCO.HHZ. 2021-10-21T10:12:08.19 3.0 positive manual P -2.81 0
IT.PLTA.HNZ. 2021-10-21T10:12:07.02 3.0 undecidable manual P -0.56 0
IV.GIUL.HHZ. 2021-10-21T10:12:02.73 3.0 undecidable manual S -0.02 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.7 0.000677 0.14 AML other m 2021-10-21T10:12:32.59
IV.SMA1.EHE. ML:2.1 0.00149 0.3 AML other m 2021-10-21T10:12:32.69
IV.RM33.EHN. ML:1.4 0.00021128995 0.1216 AML other m 2021-10-21T10:12:34.16
IV.RM33.EHE. ML:1.7 0.00042699445 0.1984 AML other m 2021-10-21T10:12:34.17
IV.MTRA.EHN. ML:1.7 0.000353 0.2 AML other m 2021-10-21T10:12:35.22
IV.MTRA.EHE. ML:1.6 0.000268 0.16 AML other m 2021-10-21T10:12:35.40
IV.LNSS.HHN. ML:1.4 0.0001719545 0.16 AML other m 2021-10-21T10:12:35.70
IV.LNSS.HHE. ML:1.6 0.0002685 0.14 AML other m 2021-10-21T10:12:35.73
IV.TERO.HHE. ML:1.2 9.064158E-5 0.0832 AML other m 2021-10-21T10:12:37.09
IV.TERO.HHN. ML:1.4 0.0001258242 0.0832 AML other m 2021-10-21T10:12:37.13
IV.NRCA.HHN. ML:1.5 0.000146 1.08 AML other m 2021-10-21T10:12:37.65
IV.NRCA.HHE. ML:1.5 0.00016 0.36 AML other m 2021-10-21T10:12:37.70
IV.GAVE.EHE. ML:1.4 0.00010695 0.4 AML other m 2021-10-21T10:12:39.62
IV.GAVE.EHN. ML:1.4 0.0001072597 0.1792 AML other m 2021-10-21T10:12:39.54
IV.RM33.HNE. ML:1.6 0.00038047305 0.1216 AML other m 2021-10-21T10:12:34.17
IV.RM33.HNN. ML:1.4 0.0002283691 0.192 AML other m 2021-10-21T10:12:35.75
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