Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 27-01-2021 and time 17:17:28 (Italy) in region 5 km NE Montereale (AQ)

A magnitude ML 1.2 earthquake occured in region: 5 km NE Montereale (AQ), on

  • 27-01-2021 16:17:28 (UTC)
  • 27-01-2021 17:17:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5680, 13.2680 at 12 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Montereale AQ 5 2581 2581
Capitignano AQ 6 665 3246
Amatrice RI 7 2657 5903
Campotosto AQ 9 542 6445
Cittareale RI 10 482 6927
Cagnano Amiterno AQ 13 1369 8296
Borbona RI 13 617 8913
Barete AQ 13 737 9650
Accumoli RI 14 667 10317
Pizzoli AQ 15 4326 14643
Posta RI 15 694 15337
Crognaleto TE 18 1297 16634

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NW of L'Aquila (69753 inhabitants)
37 Km W of Teramo (54892 inhabitants)
51 Km E of Terni (111501 inhabitants)
63 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
77 Km NE of Guidonia Montecelio (88673 inhabitants)
77 Km NE of Tivoli (56533 inhabitants)
78 Km W of Chieti (51815 inhabitants)
78 Km W of Pescara (121014 inhabitants)
94 Km SE of Perugia (166134 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
99 Km NE of Roma (2864731 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.2 2021-01-27
16:17:28		 42.5682 13.268 12 2021-07-12
16:54:58		 Bollettino Sismico Italiano INGV 86992771
Reviewed
Rev100 		ML 1.3 2021-01-27
16:17:28		 42.5678 13.2697 13 2021-01-27
16:22:36		 Sala Sismica INGV-Roma 86633791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-27 16:17:28 ± 0.08
Latitude 42.5682 ± 0.0036
Longitude 13.2680 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86992771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 331
Semi-minor axis of confidence ellipse (meter) 305
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 339
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 20
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.33365
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 86992771
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-11 13:12:33

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 86633791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-27 16:22:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-01-27T16:17:55.76 3.0 undecidable manual S -2.58 0
IV.PE3.EHZ. 2021-01-27T16:17:50.13 3.0 positive manual P -0.34 0
IV.MMO1.EHZ. 2021-01-27T16:17:41.35 0.6 undecidable manual S 7 37.0296 93 0.34 46
IV.GAVE.EHZ. 2021-01-27T16:17:39.92 0.6 undecidable manual S 294 33.4443 93 -0.14 48
IV.NRCA.HHZ. 2021-01-27T16:17:39.48 0.6 undecidable manual S 337 32.0457 94 -0.19 47
IV.TERO.HHZ. 2021-01-27T16:17:38.25 0.6 undecidable manual S 77 28.0497 95 -0.38 46
IV.MTRA.HNE. 2021-01-27T16:17:37.10 0.3 undecidable manual S 27 23.3544 97 -0.28 70
IV.LNSS.HHZ. 2021-01-27T16:17:36.19 0.1 undecidable manual S 282 18.9699 101 -0.03 100
IV.GAVE.EHZ. 2021-01-27T16:17:35.35 0.3 undecidable manual P 294 33.4443 93 0.11 72
IV.MMO1.EHZ. 2021-01-27T16:17:35.41 0.6 undecidable manual P 7 37.0296 93 -0.38 45
IV.NRCA.HHZ. 2021-01-27T16:17:34.93 0.1 undecidable manual P 337 32.0457 94 -0.09 96
IV.CAMP.HHZ. 2021-01-27T16:17:34.29 0.6 undecidable manual S 107 12.0768 120 -0.19 49
IV.TERO.HHZ. 2021-01-27T16:17:34.52 0.1 undecidable manual P 77 28.0497 95 0.1 97
IV.T1299.HNZ. 2021-01-27T16:17:33.40 0.6 undecidable manual S 9 7.3815 139 -0.12 50
IV.LNSS.HHZ. 2021-01-27T16:17:33.15 0.1 undecidable manual P 282 18.9699 101 0.12 98
IV.RM33.EHZ. 2021-01-27T16:17:33.35 0.1 undecidable manual S 214 7.881 137 -0.25 98
IV.MTRA.HNE. 2021-01-27T16:17:33.77 0.3 undecidable manual P 27 23.3544 97 0.07 74
IV.SMA1.EHZ. 2021-01-27T16:17:33.80 0.3 undecidable manual S 38 8.88 133 0.02 77
IV.CAMP.HHZ. 2021-01-27T16:17:32.14 0.1 undecidable manual P 107 12.0768 120 0.12 99
IV.SMA1.EHZ. 2021-01-27T16:17:31.90 0.1 positive manual P 38 8.88 133 0.28 97
IV.T1299.HNZ. 2021-01-27T16:17:31.63 0.1 positive manual P 9 7.3815 139 0.16 99
IV.RM33.EHZ. 2021-01-27T16:17:31.65 0.1 negative manual P 214 7.881 137 0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.4 0.00030400000000000007 0.26 AML other m 2021-01-27T16:17:33.52
IV.SMA1.EHE. ML:1.4 0.0002735 1.78 AML other m 2021-01-27T16:17:33.96
IV.SMA1.EHN. ML:1.2 0.000202 1.46 AML other m 2021-01-27T16:17:33.26
IV.RM33.EHE. ML:1.3 0.000242 0.64 AML other m 2021-01-27T16:17:34.27
IV.LNSS.HHE. ML:1.4 0.00016549999999999998 0.38 AML other m 2021-01-27T16:17:36.51
IV.LNSS.HHN. ML:1.3 0.0001595 0.36 AML other m 2021-01-27T16:17:36.39
IV.TERO.HHN. ML:1.0 0.000053099999999999996 0.2 AML other m 2021-01-27T16:17:38.51
IV.TERO.HHE. ML:0.8 0.00003505 0.42 AML other m 2021-01-27T16:17:38.77
IV.NRCA.HHE. ML:1.3 0.00009165 1.06 AML other m 2021-01-27T16:17:39.64
IV.NRCA.HHN. ML:1.1 0.00005665 0.76 AML other m 2021-01-27T16:17:40.26
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