Earthquake with magnitude of ML 1.5 on date 27-10-2021 and time 06:39:17 (UTC) in region 1 km SW Amatrice (RI)

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

  • 27-10-2021 06:39:17 (UTC)
  • 27-10-2021 08:39:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.622, 13.277 at 9 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
Posta RI 18 694 10083
Cagnano Amiterno AQ 18 1369 11452
Crognaleto TE 19 1297 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
32 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)
73 Km W of Montesilvano (53738 inhabitants)
79 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)
90 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.5 2021-10-27
06:39:17
42.6215 13.2772 9 2021-10-27
06:48:12
Sala Sismica INGV-Roma 97014791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-27 06:39:17 ± 0.06
Latitude 42.6215 ± 0.0036
Longitude 13.2772 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97014791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 368
Semi-minor axis of confidence ellipse (meter) 302
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 37
Circular confidence region, given by single value of horizontal uncertainty (meter) 370
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.47035
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 97014791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-27 06:48:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CTL8.HNZ. 2021-10-27T06:41:15.40 3.0 undecidable manual Sg 15.47 0
MN.KLV.HHZ. 2021-10-27T06:41:14.70 3.0 undecidable manual Pn -2.98 0
IV.CTI.HHZ. 2021-10-27T06:41:06.95 3.0 undecidable manual Sg 8.37 0
SL.LJU.BHZ. 2021-10-27T06:40:51.22 3.0 undecidable manual Sn -5.45 0
IV.PTRP.HHZ. 2021-10-27T06:40:50.75 3.0 undecidable manual Sg 7.09 0
IV.HAGA.HHZ. 2021-10-27T06:40:48.91 3.0 undecidable manual Pg 7.83 0
IV.MNTV.EHZ. 2021-10-27T06:40:46.10 3.0 undecidable manual Sn 0.14 0
IV.MTMR.EHZ. 2021-10-27T06:40:22.68 3.0 undecidable manual Sg -0.85 0
IV.JOPP.HHZ. 2021-10-27T06:40:22.15 3.0 undecidable manual Pn -4.56 0
IV.EUCT.HNZ. 2021-10-27T06:40:18.43 3.0 negative manual Pn -0.46 0
IV.IMOL.HNZ. 2021-10-27T06:40:17.92 3.0 undecidable manual Sn -2.71 0
IV.CAR1.HHZ. 2021-10-27T06:40:15.86 3.0 negative manual Pn -4.78 0
IV.TDS.HHZ. 2021-10-27T06:40:15.36 3.0 negative manual Pn -1.45 0
IV.RIBO.EHZ.01 2021-10-27T06:40:12.62 3.0 undecidable manual Sg 1.27 0
IV.MELA.HHZ. 2021-10-27T06:40:10.40 3.0 undecidable manual Sg -1.22 0
IX.SCL3.EHZ.02 2021-10-27T06:40:03.81 3.0 negative manual Pg 3.53 0
IV.RAVA.EHZ. 2021-10-27T06:40:00.31 3.0 positive manual Pn -0.63 0
IV.ARVD.HHZ. 2021-10-27T06:39:34.57 3.0 positive manual P -1.41 0
IV.FOSV.EHZ. 2021-10-27T06:39:33.25 3.0 negative manual P -0.19 0
IV.GAVE.EHZ. 2021-10-27T06:39:28.03 0.3 undecidable manual S 284 0.2905 50 -0.53 65
IV.MMO1.EHZ. 2021-10-27T06:39:28.31 0.3 undecidable manual S 7 0.2797 106 0.05 72
IV.NRCA.HHZ. 2021-10-27T06:39:27.00 0.3 undecidable manual S 331 0.2437 108 0.09 72
IV.CSP1.EHZ. 2021-10-27T06:39:26.84 3.0 negative manual P -0.63 0
IV.CESI.HHZ. 2021-10-27T06:39:26.87 0.3 undecidable manual P 325 0.4703 50 0.09 69
IV.TERO.HHZ. 2021-10-27T06:39:26.58 0.3 undecidable manual S 90 0.2401 109 -0.22 70
IV.FDMO.HHZ. 2021-10-27T06:39:26.20 0.3 undecidable manual P 342 0.4371 50 -0.01 71
IV.GUMA.HHZ. 2021-10-27T06:39:26.85 0.3 undecidable manual P 5 0.4434 50 0.55 63
IV.ARRO.EHZ. 2021-10-27T06:39:25.40 0.3 undecidable manual P 264 0.3786 50 0.2 69
IV.LNSS.HHZ. 2021-10-27T06:39:24.66 0.3 undecidable manual S 264 0.1754 115 0.2 72
IV.MC2.EHZ. 2021-10-27T06:39:23.86 0.3 undecidable manual P 347 0.2968 50 0.06 72
IV.GAVE.EHZ. 2021-10-27T06:39:23.43 0.1 undecidable manual P 284 0.2905 50 -0.26 92
IV.MMO1.EHZ. 2021-10-27T06:39:23.49 0.3 undecidable manual P 7 0.2797 106 -0.03 73
IV.RM33.EHZ. 2021-10-27T06:39:22.76 0.3 undecidable manual S 202 0.1214 124 0.11 74
IV.NRCA.HHZ. 2021-10-27T06:39:22.66 0.1 undecidable manual P 331 0.2437 108 -0.07 97
IV.CAMP.HHZ. 2021-10-27T06:39:22.85 0.3 undecidable manual S 131 0.1295 122 -0.06 74
IV.TERO.HHZ. 2021-10-27T06:39:22.55 0.1 undecidable manual P 90 0.2401 109 -0.12 96
IV.LNSS.HHZ. 2021-10-27T06:39:21.37 0.1 undecidable manual P 264 0.1754 115 0.05 98
IV.RM33.EHZ. 2021-10-27T06:39:20.30 0.1 undecidable manual P 202 0.1214 124 0.03 100
IV.SMA1.EHZ. 2021-10-27T06:39:20.69 0.3 undecidable manual S 78 0.0441 152 0.12 75
IV.CAMP.HHZ. 2021-10-27T06:39:20.56 0.3 undecidable manual P 131 0.1295 122 0.14 73
IV.SMA1.EHZ. 2021-10-27T06:39:19.36 0.1 undecidable manual P 78 0.0441 152 0.29 96
IV.T1299.HNZ. 2021-10-27T06:39:19.72 0.3 undecidable manual S 16 0.0135 171 -0.46 70
IV.T1299.HNZ. 2021-10-27T06:39:18.73 0.1 undecidable manual P 16 0.0135 171 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.HNE. ML:1.6 0.0004117492 0.272 AML other m 2021-10-27T06:39:23.20
IV.RM33.EHE. ML:1.6 0.00040254595 0.2176 AML other m 2021-10-27T06:39:23.21
IV.RM33.EHN. ML:1.6 0.0004174847 0.4192 AML other m 2021-10-27T06:39:25.68
IV.LNSS.HHE. ML:1.5 0.00026537595 0.1216 AML other m 2021-10-27T06:39:25.02
IV.LNSS.HHN. ML:1.5 0.00025251505 0.2016 AML other m 2021-10-27T06:39:25.08
IV.RM33.HNN. ML:1.6 0.000472 0.4 AML other m 2021-10-27T06:39:25.67
IV.TERO.HHN. ML:1.5 0.00018093495 0.1184 AML other m 2021-10-27T06:39:27.27
IV.NRCA.HHE. ML:1.6 0.00021760625 0.1024 AML other m 2021-10-27T06:39:27.14
IV.TERO.HHE. ML:1.5 0.0001683736 0.1216 AML other m 2021-10-27T06:39:27.52
IV.NRCA.HHN. ML:1.5 0.000158 0.12 AML other m 2021-10-27T06:39:27.65
IV.GAVE.EHE. ML:1.7 0.0002355 0.26 AML other m 2021-10-27T06:39:28.31
IV.GAVE.EHN. ML:1.6 0.0001722648 0.1824 AML other m 2021-10-27T06:39:29.26
IV.ARRO.EHE. ML:1.2 5.07E-5 0.66 AML other m 2021-10-27T06:39:33.06
IV.ARRO.EHN. ML:1.1 4.733407E-5 0.1984 AML other m 2021-10-27T06:39:37.45
IV.SMA1.EHE. ML:2.2 0.003089535 0.2816 AML other m 2021-10-27T06:39:20.80
IV.SMA1.EHN. ML:2 0.0018176735 0.1824 AML other m 2021-10-27T06:39:21.02
IV.LNSS.HNE. ML:1.6 0.00030824045 0.1696 AML other m 2021-10-27T06:39:24.81
IV.LNSS.HNN. ML:1.6 0.0002828802 0.2688 AML other m 2021-10-27T06:39:27.80
IV.TERO.HNE. ML:1.6 0.00020220265 0.0928 AML other m 2021-10-27T06:39:27.47
IV.NRCA.HNE. ML:1.6 0.0002051205 0.112 AML other m 2021-10-27T06:39:27.14
IV.NRCA.HNN. ML:1.4 0.0001485186 0.1024 AML other m 2021-10-27T06:39:28.55
IV.GAVE.HNE. ML:1.7 0.0002364946 0.2816 AML other m 2021-10-27T06:39:28.30
IV.FDMO.HHE. ML:1 3.0500685E-5 0.3392 AML other m 2021-10-27T06:39:36.23
IV.FDMO.HHN. ML:1 2.913571E-5 0.2016 AML other m 2021-10-27T06:39:36.05
IV.CSP1.EHE. ML:1.5 8.058069E-5 0.4192 AML other m 2021-10-27T06:39:39.38
IV.CSP1.EHN. ML:1.4 5.94056325E-5 0.3808 AML other m 2021-10-27T06:39:38.64
IV.CESI.HHE. ML:1.2 3.3843245E-5 0.3616 AML other m 2021-10-27T06:39:39.13
IV.CESI.HHN. ML:1.2 4.112594E-5 0.2784 AML other m 2021-10-27T06:39:35.80
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