Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 14-12-2018 and time 21:22:28 (Italy) in region 1 km S Modica (RG)

A magnitude ML 1.5 earthquake occured in region: 1 km S Modica (RG), on

  • 14-12-2018 20:22:28 (UTC)
  • 14-12-2018 21:22:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 36.8500, 14.7660 at 25 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
Modica RG 1 54633 54633
Scicli RG 8 27077 81710
Ragusa RG 9 73313 155023
Ispica RG 14 16061 171084
Pozzallo RG 15 19552 190636
Rosolini SR 17 21427 212063
Comiso RG 18 30156 242219

Municipalities with at least 50000 inhabitants

An earthquake occurred to
1 Km S of Modica (54633 inhabitants)
9 Km SE of Ragusa (73313 inhabitants)
23 Km SE of Vittoria (63339 inhabitants)
52 Km SE of Gela (75827 inhabitants)
53 Km W of Siracusa (122291 inhabitants)
78 Km SW of Catania (314555 inhabitants)
92 Km SW of Acireale (52622 inhabitants)
95 Km SE of Caltanissetta (63360 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 1.5 2018-12-14
20:22:28		 36.8503 14.7658 25 2019-06-04
09:16:18		 Bollettino Sismico Italiano INGV 68969771
Reviewed
Rev100 		ML 1.6 2018-12-14
20:22:28		 36.8462 14.7702 27 2018-12-14
20:33:12		 Sala Sismica INGV-Roma 63914511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-14 20:22:28 ± 0.19
Latitude 36.8503 ± 0.0099
Longitude 14.7658 ± 0.0112
Depth (km) 25 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 68969771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 937
Semi-minor axis of confidence ellipse (meter) 822
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 345
Circular confidence region, given by single value of horizontal uncertainty (meter) 940.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.10972
Epicentral distance of station farthest from the epicenter (degree) 0.53420
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 68969771
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-05-28 10:14:55

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 63914511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-14 20:33:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAGA.HHZ. 2018-12-14T20:22:47.14 0.6 undecidable manual S 35 59.2962 106 -0.26 44
IV.HLNI.HHZ. 2018-12-14T20:22:46.68 0.6 undecidable manual S 10 56.0994 107 0.1 45
IV.SSY.HHZ. 2018-12-14T20:22:43.85 0.6 undecidable manual S 39 43.623 113 0.38 44
IV.HPAC.HHZ. 2018-12-14T20:22:40.58 0.6 undecidable manual S 123 28.749 125 0.59 43
IV.RAFF.HHN. 2018-12-14T20:22:39.42 0.3 undecidable manual P 319 54.6009 108 0.66 59
IV.HAGA.HHZ. 2018-12-14T20:22:39.23 0.3 undecidable manual P 35 59.2962 106 -0.22 67
IV.HLNI.HHZ. 2018-12-14T20:22:38.76 0.1 undecidable manual P 10 56.0994 107 -0.22 90
IV.CROCE.HHZ. 2018-12-14T20:22:38.26 0.3 undecidable manual S 265 20.6682 136 -0.07 73
IV.SSY.HHZ. 2018-12-14T20:22:37.18 0.1 positive manual P 39 43.623 113 0 95
IV.HMDC.HHZ. 2018-12-14T20:22:36.91 0.3 undecidable manual S 7 12.1767 151 -0.06 75
IV.CROCE.HHZ. 2018-12-14T20:22:34.11 0.1 undecidable manual P 265 20.6682 136 -0.1 97
IV.HPAC.HHZ. 2018-12-14T20:22:34.67 0.6 undecidable manual P 123 28.749 125 -0.5 44
IV.HMDC.HHZ. 2018-12-14T20:22:33.36 0.1 undecidable manual P 7 12.1767 151 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HMDC.HHN. ML:1.7 0.0002728486 0.0768 AML other m 2018-12-14T20:22:37.13
IV.HMDC.HHE. ML:1.7 0.00029077300000000003 0.2176 AML other m 2018-12-14T20:22:37.20
IV.HPAC.HHE. ML:1.2 0.00006295103 1.6672 AML other m 2018-12-14T20:22:40.93
IV.HPAC.HHN. ML:0.7 0.000020798831500000004 0.2176 AML other m 2018-12-14T20:22:41.15
IV.CROCE.HHE. ML:1.4 0.00012209689999999999 0.9344 AML other m 2018-12-14T20:22:43.32
IV.SSY.HHN. ML:2.0 0.000240220535 1.7184 AML other m 2018-12-14T20:22:45.91
IV.HLNI.HHE. ML:1.5 0.000065867105 0.128 AML other m 2018-12-14T20:22:47.16
IV.CROCE.HHN. ML:1.4 0.00012340025 0.8704 AML other m 2018-12-14T20:22:47.30
IV.HLNI.HHN. ML:1.5 0.000066874031 0.1024 AML other m 2018-12-14T20:22:47.83
IV.SSY.HHE. ML:1.8 0.000174383925 0.6528 AML other m 2018-12-14T20:22:57.81
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